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More SSLv2 (and SSLv3) related fixes 

In doing some work on cipher_pref_check() I noticed that it was failing on SSLv2 since the call to "$OPENSSL s_client" includes SNI. I've also noticed in my testing that "$OPENSSL s_client" will not connect to an SSLv2-only server unless the "-ssl2" flag is included. So, I carefully checked each call to "$OPENSSL s_client" in the program (other than in run_allciphers and run_cipher_per_proto, since those functions are already addresses in PR #341) to see whether they would inappropriate fail with an SSLv2-only (or SSLv3-only) server.

As a general rule, if the call doesn't currently include the protocol, then I added "-ssl2" if $OPTIMAL_PROTO is "-ssl2", indicating that the server only supports SSLv2, and I removed any $SNI if a protocol is specified if a protocol is specified and it is either SSLv2 or SSLv3.

I tested it on an SSLv2-only server, and the results are much better. I also tested it on a collection of other servers, none of which support SSLv2, and the results are the same as with the current code.

The only thing I haven't been able to test is how the revised code works when the "--starttls" option is used. I don't believe the changes I made would cause anything to break in that case, but I also don't think code will work any better in that case, if the server only supports SSLv2. Of course, since no server should support SSLv2 (let alone only SSLv2), it shouldn't really be an issue.

One thing that I did not change, but that I do not understand; why does determine_optimal_proto() try the protocols in the order "-tls1_2 -tls1 -ssl3 -tls1_1 -ssl2" rather than "-tls1_2 -tls1_1 -tls1 -ssl3 -ssl2"? Doesn't the current ordering imply that TLS v1.0 and SSLv3 are better than TLS v1.1?
This commit is contained in:
David Cooper 2016-04-29 17:04:01 -04:00
parent 269a9e8c60
commit 9d1803d6eb
1 changed files with 125 additions and 43 deletions
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168
testssl.sh
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@ -617,10 +617,12 @@ wait_kill(){
runs_HTTP() { runs_HTTP() {
local -i ret=0 local -i ret=0
local -i was_killed local -i was_killed
local addcmd=""
if ! $CLIENT_AUTH; then if ! $CLIENT_AUTH; then
# SNI is nonsense for !HTTPS but fortunately for other protocols s_client doesn't seem to care # SNI is nonsense for !HTTPS but fortunately for other protocols s_client doesn't seem to care
printf "$GET_REQ11" | $OPENSSL s_client $1 -quiet $BUGS -connect $NODEIP:$PORT $PROXY $SNI >$TMPFILE 2>$ERRFILE & [[ ! "$1" =~ ssl ]] && addcmd="$SNI"
printf "$GET_REQ11" | $OPENSSL s_client $1 -quiet $BUGS -connect $NODEIP:$PORT $PROXY $addcmd >$TMPFILE 2>$ERRFILE &
wait_kill $! $HEADER_MAXSLEEP wait_kill $! $HEADER_MAXSLEEP
was_killed=$? was_killed=$?
head $TMPFILE | grep -aq ^HTTP && SERVICE=HTTP head $TMPFILE | grep -aq ^HTTP && SERVICE=HTTP
@ -670,7 +672,7 @@ runs_HTTP() {
#problems not handled: chunked #problems not handled: chunked
run_http_header() { run_http_header() {
local header local header addcmd=""
local -i ret local -i ret
local referer useragent local referer useragent
local url redirect local url redirect
@ -680,12 +682,13 @@ run_http_header() {
outln outln
[[ -z "$1" ]] && url="/" || url="$1" [[ -z "$1" ]] && url="/" || url="$1"
printf "$GET_REQ11" | $OPENSSL s_client $OPTIMAL_PROTO $BUGS -quiet -ign_eof -connect $NODEIP:$PORT $PROXY $SNI >$HEADERFILE 2>$ERRFILE & [[ ! "$OPTIMAL_PROTO" =~ ssl ]] && addcmd="$SNI"
printf "$GET_REQ11" | $OPENSSL s_client $OPTIMAL_PROTO $BUGS -quiet -ign_eof -connect $NODEIP:$PORT $PROXY $addcmd >$HEADERFILE 2>$ERRFILE &
wait_kill $! $HEADER_MAXSLEEP wait_kill $! $HEADER_MAXSLEEP
if [[ $? -eq 0 ]]; then if [[ $? -eq 0 ]]; then
# we do the get command again as it terminated within $HEADER_MAXSLEEP. Thus it didn't hang, we do it # we do the get command again as it terminated within $HEADER_MAXSLEEP. Thus it didn't hang, we do it
# again in the foreground ito get an ccurate header time! # again in the foreground ito get an accurate header time!
printf "$GET_REQ11" | $OPENSSL s_client $OPTIMAL_PROTO $BUGS -quiet -ign_eof -connect $NODEIP:$PORT $PROXY $SNI >$HEADERFILE 2>$ERRFILE printf "$GET_REQ11" | $OPENSSL s_client $OPTIMAL_PROTO $BUGS -quiet -ign_eof -connect $NODEIP:$PORT $PROXY $addcmd >$HEADERFILE 2>$ERRFILE
NOW_TIME=$(date "+%s") NOW_TIME=$(date "+%s")
HTTP_TIME=$(awk -F': ' '/^date:/ { print $2 } /^Date:/ { print $2 }' $HEADERFILE) HTTP_TIME=$(awk -F': ' '/^date:/ { print $2 } /^Date:/ { print $2 }' $HEADERFILE)
HAD_SLEPT=0 HAD_SLEPT=0
@ -1335,11 +1338,12 @@ prettyprint_local() {
# list ciphers (and makes sure you have them locally configured) # list ciphers (and makes sure you have them locally configured)
# arg[1]: cipher list (or anything else) # arg[1]: cipher list (or anything else)
# arg[2]: protocol (e.g., -ssl2)
listciphers() { listciphers() {
local -i ret local -i ret
local debugname="$(sed -e s'/\!/not/g' -e 's/\:/_/g' <<< "$1")" local debugname="$(sed -e s'/\!/not/g' -e 's/\:/_/g' <<< "$1")"
$OPENSSL ciphers "$1" &>$TMPFILE $OPENSSL ciphers $2 "$1" &>$TMPFILE
ret=$? ret=$?
debugme cat $TMPFILE debugme cat $TMPFILE
@ -1353,12 +1357,14 @@ listciphers() {
# argv[3]: ok to offer? 0: yes, 1: no # argv[3]: ok to offer? 0: yes, 1: no
std_cipherlists() { std_cipherlists() {
local -i sclient_success local -i sclient_success
local singlespaces local singlespaces proto="" addcmd=""
local debugname="$(sed -e s'/\!/not/g' -e 's/\:/_/g' <<< "$1")" local debugname="$(sed -e s'/\!/not/g' -e 's/\:/_/g' <<< "$1")"
[[ "$OPTIMAL_PROTO" == "-ssl2" ]] && addcmd="$OPTIMAL_PROTO" && proto="$OPTIMAL_PROTO"
[[ ! "$OPTIMAL_PROTO" =~ ssl ]] && addcmd="$SNI"
pr_bold "$2 " # indent in order to be in the same row as server preferences pr_bold "$2 " # indent in order to be in the same row as server preferences
if listciphers "$1"; then # is that locally available?? if listciphers "$1" $proto; then # is that locally available??
$OPENSSL s_client -cipher "$1" $BUGS $STARTTLS -connect $NODEIP:$PORT $PROXY $SNI 2>$ERRFILE >$TMPFILE </dev/null $OPENSSL s_client -cipher "$1" $BUGS $STARTTLS -connect $NODEIP:$PORT $PROXY $addcmd 2>$ERRFILE >$TMPFILE </dev/null
sclient_connect_successful $? $TMPFILE sclient_connect_successful $? $TMPFILE
sclient_success=$? sclient_success=$?
debugme cat $ERRFILE debugme cat $ERRFILE
@ -1407,7 +1413,11 @@ std_cipherlists() {
tmpfile_handle $FUNCNAME.$debugname.txt tmpfile_handle $FUNCNAME.$debugname.txt
else else
singlespaces=$(echo "$2" | sed -e 's/ \+/ /g' -e 's/^ //' -e 's/ $//g' -e 's/ //g') singlespaces=$(echo "$2" | sed -e 's/ \+/ /g' -e 's/^ //' -e 's/ $//g' -e 's/ //g')
local_problem_ln "No $singlespaces configured in $OPENSSL" if [[ "$OPTIMAL_PROTO" == "-ssl2" ]]; then
local_problem_ln "No $singlespaces for SSLv2 configured in $OPENSSL"
else
local_problem_ln "No $singlespaces configured in $OPENSSL"
fi
fileout "std_$4" "WARN" "Cipher $2 ($1) not supported by local OpenSSL ($OPENSSL)" fileout "std_$4" "WARN" "Cipher $2 ($1) not supported by local OpenSSL ($OPENSSL)"
fi fi
# we need 1xlf in those cases: # we need 1xlf in those cases:
@ -1535,7 +1545,11 @@ test_just_one(){
neat_list $HEXC $ciph $kx $enc | grep -qwai "$arg" neat_list $HEXC $ciph $kx $enc | grep -qwai "$arg"
fi fi
if [[ $? -eq 0 ]]; then # string matches, so we can ssl to it: if [[ $? -eq 0 ]]; then # string matches, so we can ssl to it:
$OPENSSL s_client -cipher $ciph $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI 2>$ERRFILE >$TMPFILE </dev/null if [[ "$sslvers" == "SSLv2" ]]; then
$OPENSSL s_client -ssl2 -cipher $ciph $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY 2>$ERRFILE >$TMPFILE </dev/null
else
$OPENSSL s_client -cipher $ciph $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI 2>$ERRFILE >$TMPFILE </dev/null
fi
sclient_connect_successful $? $TMPFILE sclient_connect_successful $? $TMPFILE
sclient_success=$? sclient_success=$?
if [[ $kx == "Kx=ECDH" ]] || [[ $kx == "Kx=DH" ]] || [[ $kx == "Kx=EDH" ]]; then if [[ $kx == "Kx=ECDH" ]] || [[ $kx == "Kx=DH" ]] || [[ $kx == "Kx=EDH" ]]; then
@ -2482,14 +2496,16 @@ run_server_preference() {
# now reversed offline via tac, see https://github.com/thomassa/testssl.sh/commit/7a4106e839b8c3033259d66697893765fc468393 : # now reversed offline via tac, see https://github.com/thomassa/testssl.sh/commit/7a4106e839b8c3033259d66697893765fc468393 :
local list_reverse="AES256-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-DSS-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDH-RSA-AES256-SHA:ECDH-RSA-AES128-SHA:ECDH-RSA-DES-CBC3-SHA:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-AES128-SHA:AES256-SHA:AES128-SHA256:AES128-SHA:RC4-SHA:DES-CBC-SHA:RC4-MD5:DES-CBC3-SHA" local list_reverse="AES256-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-DSS-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDH-RSA-AES256-SHA:ECDH-RSA-AES128-SHA:ECDH-RSA-DES-CBC3-SHA:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-AES128-SHA:AES256-SHA:AES128-SHA256:AES128-SHA:RC4-SHA:DES-CBC-SHA:RC4-MD5:DES-CBC3-SHA"
local has_cipher_order=true local has_cipher_order=true
local isok local isok addcmd="" addcmd2="" sni=""
outln outln
pr_headlineln " Testing server preferences " pr_headlineln " Testing server preferences "
outln outln
pr_bold " Has server cipher order? " pr_bold " Has server cipher order? "
$OPENSSL s_client $STARTTLS -cipher $list_fwd $BUGS -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>$ERRFILE >$TMPFILE [[ "$OPTIMAL_PROTO" == "-ssl2" ]] && addcmd="$OPTIMAL_PROTO"
[[ ! "$OPTIMAL_PROTO" =~ ssl ]] && addcmd="$SNI" && sni="$SNI"
$OPENSSL s_client $STARTTLS -cipher $list_fwd $BUGS -connect $NODEIP:$PORT $PROXY $addcmd </dev/null 2>$ERRFILE >$TMPFILE
if ! sclient_connect_successful $? $TMPFILE && [[ -z "$STARTTLS_PROTOCOL" ]]; then if ! sclient_connect_successful $? $TMPFILE && [[ -z "$STARTTLS_PROTOCOL" ]]; then
pr_warning "no matching cipher in this list found (pls report this): " pr_warning "no matching cipher in this list found (pls report this): "
outln "$list_fwd . " outln "$list_fwd . "
@ -2501,7 +2517,8 @@ run_server_preference() {
# workaround is to connect with a protocol # workaround is to connect with a protocol
debugme out "(workaround #188) " debugme out "(workaround #188) "
determine_optimal_proto $STARTTLS_PROTOCOL determine_optimal_proto $STARTTLS_PROTOCOL
$OPENSSL s_client $STARTTLS $STARTTLS_OPTIMAL_PROTO -cipher $list_fwd $BUGS -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>$ERRFILE >$TMPFILE [[ ! "$STARTTLS_OPTIMAL_PROTO" =~ ssl ]] && addcmd2="$SNI"
$OPENSSL s_client $STARTTLS $STARTTLS_OPTIMAL_PROTO -cipher $list_fwd $BUGS -connect $NODEIP:$PORT $PROXY $addcmd2 </dev/null 2>$ERRFILE >$TMPFILE
if ! sclient_connect_successful $? $TMPFILE; then if ! sclient_connect_successful $? $TMPFILE; then
pr_warning "no matching cipher in this list found (pls report this): " pr_warning "no matching cipher in this list found (pls report this): "
outln "$list_fwd . " outln "$list_fwd . "
@ -2513,7 +2530,15 @@ run_server_preference() {
if $has_cipher_order; then if $has_cipher_order; then
cipher1=$(grep -wa Cipher $TMPFILE | egrep -avw "New|is" | sed -e 's/^ \+Cipher \+://' -e 's/ //g') cipher1=$(grep -wa Cipher $TMPFILE | egrep -avw "New|is" | sed -e 's/^ \+Cipher \+://' -e 's/ //g')
$OPENSSL s_client $STARTTLS $STARTTLS_OPTIMAL_PROTO -cipher $list_reverse $BUGS -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>>$ERRFILE >$TMPFILE addcmd2=""
if [[ -n "$STARTTLS_OPTIMAL_PROTO" ]]; then
addcmd2="$STARTTLS_OPTIMAL_PROTO"
[[ ! "$STARTTLS_OPTIMAL_PROTO" =~ ssl ]] && addcmd2="$addcmd2 $SNI"
else
[[ "$OPTIMAL_PROTO" == "-ssl2" ]] && addcmd2="$OPTIMAL_PROTO"
[[ ! "$OPTIMAL_PROTO" =~ ssl ]] && addcmd2="$addcmd2 $SNI"
fi
$OPENSSL s_client $STARTTLS -cipher $list_reverse $BUGS -connect $NODEIP:$PORT $PROXY $addcmd2 </dev/null 2>>$ERRFILE >$TMPFILE
# that worked above so no error handling here # that worked above so no error handling here
cipher2=$(grep -wa Cipher $TMPFILE | egrep -avw "New|is" | sed -e 's/^ \+Cipher \+://' -e 's/ //g') cipher2=$(grep -wa Cipher $TMPFILE | egrep -avw "New|is" | sed -e 's/^ \+Cipher \+://' -e 's/ //g')
@ -2530,10 +2555,10 @@ run_server_preference() {
outln outln
pr_bold " Negotiated protocol " pr_bold " Negotiated protocol "
$OPENSSL s_client $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>>$ERRFILE >$TMPFILE $OPENSSL s_client $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $addcmd </dev/null 2>>$ERRFILE >$TMPFILE
if ! sclient_connect_successful $? $TMPFILE; then if ! sclient_connect_successful $? $TMPFILE; then
# 2 second try with $OPTIMAL_PROTO especially for intolerant IIS6 servers: # 2 second try with $OPTIMAL_PROTO especially for intolerant IIS6 servers:
$OPENSSL s_client $STARTTLS $OPTIMAL_PROTO $BUGS -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>>$ERRFILE >$TMPFILE $OPENSSL s_client $STARTTLS $OPTIMAL_PROTO $BUGS -connect $NODEIP:$PORT $PROXY $sni </dev/null 2>>$ERRFILE >$TMPFILE
sclient_connect_successful $? $TMPFILE || pr_warning "Handshake error!" sclient_connect_successful $? $TMPFILE || pr_warning "Handshake error!"
fi fi
default_proto=$(grep -aw "Protocol" $TMPFILE | sed -e 's/^.*Protocol.*://' -e 's/ //g') default_proto=$(grep -aw "Protocol" $TMPFILE | sed -e 's/^.*Protocol.*://' -e 's/ //g')
@ -2627,7 +2652,9 @@ run_server_preference() {
out " (SSLv3: "; local_problem "$OPENSSL doesn't support \"s_client -ssl3\"" ; outln ")"; out " (SSLv3: "; local_problem "$OPENSSL doesn't support \"s_client -ssl3\"" ; outln ")";
continue continue
fi fi
$OPENSSL s_client $STARTTLS -"$p" $BUGS -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>>$ERRFILE >$TMPFILE addcmd=""
[[ ! "$p" =~ ssl ]] && addcmd="$SNI"
$OPENSSL s_client $STARTTLS -"$p" $BUGS -connect $NODEIP:$PORT $PROXY $addcmd </dev/null 2>>$ERRFILE >$TMPFILE
if sclient_connect_successful $? $TMPFILE; then if sclient_connect_successful $? $TMPFILE; then
proto[i]=$(grep -aw "Protocol" $TMPFILE | sed -e 's/^.*Protocol.*://' -e 's/ //g') proto[i]=$(grep -aw "Protocol" $TMPFILE | sed -e 's/^.*Protocol.*://' -e 's/ //g')
cipher[i]=$(grep -aw "Cipher" $TMPFILE | egrep -avw "New|is" | sed -e 's/^.*Cipher.*://' -e 's/ //g') cipher[i]=$(grep -aw "Cipher" $TMPFILE | egrep -avw "New|is" | sed -e 's/^.*Cipher.*://' -e 's/ //g')
@ -2687,7 +2714,7 @@ run_server_preference() {
} }
cipher_pref_check() { cipher_pref_check() {
local p proto protos npn_protos local p proto protos npn_protos addcmd=""
local tested_cipher cipher order local tested_cipher cipher order
pr_bold " Cipher order" pr_bold " Cipher order"
@ -2702,7 +2729,9 @@ cipher_pref_check() {
out "\n SSLv3: "; local_problem "$OPENSSL doesn't support \"s_client -ssl3\""; out "\n SSLv3: "; local_problem "$OPENSSL doesn't support \"s_client -ssl3\"";
continue continue
fi fi
$OPENSSL s_client $STARTTLS -"$p" $BUGS -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>$ERRFILE >$TMPFILE addcmd=""
[[ ! "$p" =~ ssl ]] && addcmd="$SNI"
$OPENSSL s_client $STARTTLS -"$p" $BUGS -connect $NODEIP:$PORT $PROXY $addcmd </dev/null 2>$ERRFILE >$TMPFILE
if sclient_connect_successful $? $TMPFILE; then if sclient_connect_successful $? $TMPFILE; then
tested_cipher="" tested_cipher=""
proto=$(grep -aw "Protocol" $TMPFILE | sed -e 's/^.*Protocol.*://' -e 's/ //g') proto=$(grep -aw "Protocol" $TMPFILE | sed -e 's/^.*Protocol.*://' -e 's/ //g')
@ -2713,7 +2742,7 @@ cipher_pref_check() {
tested_cipher="-"$cipher tested_cipher="-"$cipher
order="$cipher" order="$cipher"
while true; do while true; do
$OPENSSL s_client $STARTTLS -"$p" $BUGS -cipher "ALL:$tested_cipher" -connect $NODEIP:$PORT $PROXY $SNI </dev/null 2>>$ERRFILE >$TMPFILE $OPENSSL s_client $STARTTLS -"$p" $BUGS -cipher "ALL:$tested_cipher" -connect $NODEIP:$PORT $PROXY $addcmd </dev/null 2>>$ERRFILE >$TMPFILE
sclient_connect_successful $? $TMPFILE || break sclient_connect_successful $? $TMPFILE || break
cipher=$(grep -aw "Cipher" $TMPFILE | egrep -avw "New|is" | sed -e 's/^.*Cipher.*://' -e 's/ //g') cipher=$(grep -aw "Cipher" $TMPFILE | egrep -avw "New|is" | sed -e 's/^.*Cipher.*://' -e 's/ //g')
out "$cipher " out "$cipher "
@ -2918,7 +2947,7 @@ tls_time() {
debugme out "$TLS_TIME" debugme out "$TLS_TIME"
outln outln
else else
pr_warning "SSLv3 through TLS 1.2 didn't return a timestamp" pr_warningln "SSLv3 through TLS 1.2 didn't return a timestamp"
fileout "tls_time" "INFO" "No TLS timestamp returned by SSLv3 through TLSv1.2" fileout "tls_time" "INFO" "No TLS timestamp returned by SSLv3 through TLSv1.2"
fi fi
return 0 return 0
@ -2936,7 +2965,7 @@ sclient_connect_successful() {
# arg1 is "-cipher <OpenSSL cipher>" or empty # arg1 is "-cipher <OpenSSL cipher>" or empty
determine_tls_extensions() { determine_tls_extensions() {
local proto local proto addcmd
local success local success
local alpn="" local alpn=""
local savedir local savedir
@ -2946,14 +2975,48 @@ determine_tls_extensions() {
# throwing 1st every cipher/protocol at the server to know what works # throwing 1st every cipher/protocol at the server to know what works
success=7 success=7
if [[ "$OPTIMAL_PROTO" == "-ssl2" ]]; then
$OPENSSL s_client $STARTTLS $BUGS $1 -showcerts -connect $NODEIP:$PORT $PROXY -ssl2 </dev/null 2>$ERRFILE >$TMPFILE
sclient_connect_successful $? $TMPFILE && success=0
if [[ $success -eq 0 ]]; then
# Place the server's certificate in $HOSTCERT and any intermediate
# certificates that were provided in $TEMPDIR/intermediatecerts.pem
savedir=$(pwd); cd $TEMPDIR
# http://backreference.org/2010/05/09/ocsp-verification-with-openssl/
awk -v n=-1 '/Server certificate/ {start=1}
/-----BEGIN CERTIFICATE-----/{ if (start) {inc=1; n++} }
inc { print > ("level" n ".crt") }
/---END CERTIFICATE-----/{ inc=0 }' $TMPFILE
nrsaved=$(count_words "$(echo level?.crt 2>/dev/null)")
if [[ $nrsaved -eq 0 ]]; then
success=1
else
success=0
mv level0.crt $HOSTCERT
if [[ $nrsaved -eq 1 ]]; then
echo "" > $TEMPDIR/intermediatecerts.pem
else
cat level?.crt > $TEMPDIR/intermediatecerts.pem
rm level?.crt
fi
fi
cd "$savedir"
fi
tmpfile_handle $FUNCNAME.txt
return $success
fi
for proto in tls1_2 tls1_1 tls1 ssl3; do for proto in tls1_2 tls1_1 tls1 ssl3; do
# alpn: echo | openssl s_client -connect google.com:443 -tlsextdebug -alpn h2-14 -servername google.com <-- suport needs to be checked b4 -- see also: ssl/t1_trce.c # alpn: echo | openssl s_client -connect google.com:443 -tlsextdebug -alpn h2-14 -servername google.com <-- suport needs to be checked b4 -- see also: ssl/t1_trce.c
$OPENSSL s_client $STARTTLS $BUGS $1 -showcerts -connect $NODEIP:$PORT $PROXY $SNI -$proto -tlsextdebug -nextprotoneg $alpn -status </dev/null 2>$ERRFILE >$TMPFILE addcmd=""
[[ ! "$proto" =~ ssl ]] && addcmd="$SNI"
$OPENSSL s_client $STARTTLS $BUGS $1 -showcerts -connect $NODEIP:$PORT $PROXY $addcmd -$proto -tlsextdebug -nextprotoneg $alpn -status </dev/null 2>$ERRFILE >$TMPFILE
sclient_connect_successful $? $TMPFILE && success=0 && break sclient_connect_successful $? $TMPFILE && success=0 && break
done # this loop is needed for IIS6 and others which have a handshake size limitations done # this loop is needed for IIS6 and others which have a handshake size limitations
if [[ $success -eq 7 ]]; then if [[ $success -eq 7 ]]; then
# "-status" above doesn't work for GOST only servers, so we do another test without it and see whether that works then: # "-status" above doesn't work for GOST only servers, so we do another test without it and see whether that works then:
$OPENSSL s_client $STARTTLS $BUGS $1 -showcerts -connect $NODEIP:$PORT $PROXY $SNI -$proto -tlsextdebug </dev/null 2>>$ERRFILE >$TMPFILE $OPENSSL s_client $STARTTLS $BUGS $1 -showcerts -connect $NODEIP:$PORT $PROXY $addcmd -$proto -tlsextdebug </dev/null 2>>$ERRFILE >$TMPFILE
if ! sclient_connect_successful $? $TMPFILE; then if ! sclient_connect_successful $? $TMPFILE; then
if [ -z "$1" ]; then if [ -z "$1" ]; then
pr_warningln "Strange, no SSL/TLS protocol seems to be supported (error around line $((LINENO - 6)))" pr_warningln "Strange, no SSL/TLS protocol seems to be supported (error around line $((LINENO - 6)))"
@ -4624,13 +4687,14 @@ run_renego() {
# no SNI here. Not needed as there won't be two different SSL stacks for one IP # no SNI here. Not needed as there won't be two different SSL stacks for one IP
local legacycmd="" local legacycmd=""
local insecure_renogo_str="Secure Renegotiation IS NOT" local insecure_renogo_str="Secure Renegotiation IS NOT"
local sec_renego sec_client_renego local sec_renego sec_client_renego addcmd=""
[[ $VULN_COUNT -le $VULN_THRESHLD ]] && outln && pr_headlineln " Testing for Renegotiation vulnerabilities " && outln [[ $VULN_COUNT -le $VULN_THRESHLD ]] && outln && pr_headlineln " Testing for Renegotiation vulnerabilities " && outln
pr_bold " Secure Renegotiation "; out "(CVE-2009-3555) " # and RFC5746, OSVDB 59968-59974 pr_bold " Secure Renegotiation "; out "(CVE-2009-3555) " # and RFC5746, OSVDB 59968-59974
# community.qualys.com/blogs/securitylabs/2009/11/05/ssl-and-tls-authentication-gap-vulnerability-discovered # community.qualys.com/blogs/securitylabs/2009/11/05/ssl-and-tls-authentication-gap-vulnerability-discovered
$OPENSSL s_client $OPTIMAL_PROTO $STARTTLS $BUGS -connect $NODEIP:$PORT $SNI $PROXY 2>&1 </dev/null >$TMPFILE 2>$ERRFILE [[ ! "$OPTIMAL_PROTO" =~ ssl ]] && addcmd="$SNI"
$OPENSSL s_client $OPTIMAL_PROTO $STARTTLS $BUGS -connect $NODEIP:$PORT $addcmd $PROXY 2>&1 </dev/null >$TMPFILE 2>$ERRFILE
if sclient_connect_successful $? $TMPFILE; then if sclient_connect_successful $? $TMPFILE; then
grep -iaq "$insecure_renogo_str" $TMPFILE grep -iaq "$insecure_renogo_str" $TMPFILE
sec_renego=$? # 0= Secure Renegotiation IS NOT supported sec_renego=$? # 0= Secure Renegotiation IS NOT supported
@ -4683,7 +4747,7 @@ run_renego() {
else else
# We need up to two tries here, as some LiteSpeed servers don't answer on "R" and block. Thus first try in the background # We need up to two tries here, as some LiteSpeed servers don't answer on "R" and block. Thus first try in the background
# msg enables us to look deeper into it while debugging # msg enables us to look deeper into it while debugging
echo R | $OPENSSL s_client $OPTIMAL_PROTO $BUGS $legacycmd $STARTTLS -msg -connect $NODEIP:$PORT $SNI $PROXY >$TMPFILE 2>>$ERRFILE & echo R | $OPENSSL s_client $OPTIMAL_PROTO $BUGS $legacycmd $STARTTLS -msg -connect $NODEIP:$PORT $addcmd $PROXY >$TMPFILE 2>>$ERRFILE &
wait_kill $! $HEADER_MAXSLEEP wait_kill $! $HEADER_MAXSLEEP
if [[ $? -eq 3 ]]; then if [[ $? -eq 3 ]]; then
pr_done_good "likely not vulnerable (OK)"; outln " (timed out)" # it hung pr_done_good "likely not vulnerable (OK)"; outln " (timed out)" # it hung
@ -4691,7 +4755,7 @@ run_renego() {
sec_client_renego=1 sec_client_renego=1
else else
# second try in the foreground as we are sure now it won't hang # second try in the foreground as we are sure now it won't hang
echo R | $OPENSSL s_client $legacycmd $STARTTLS $BUGS -msg -connect $NODEIP:$PORT $SNI $PROXY >$TMPFILE 2>>$ERRFILE echo R | $OPENSSL s_client $legacycmd $STARTTLS $BUGS -msg -connect $NODEIP:$PORT $addcmd $PROXY >$TMPFILE 2>>$ERRFILE
sec_client_renego=$? # 0=client is renegotiating & doesn't return an error --> vuln! sec_client_renego=$? # 0=client is renegotiating & doesn't return an error --> vuln!
case "$sec_client_renego" in case "$sec_client_renego" in
0) 0)
@ -4803,7 +4867,7 @@ run_crime() {
# to the version of TLS/SSL, more: http://www.breachattack.com/ . Foreign referrers are the important thing here! # to the version of TLS/SSL, more: http://www.breachattack.com/ . Foreign referrers are the important thing here!
# Mitigation: see https://community.qualys.com/message/20360 # Mitigation: see https://community.qualys.com/message/20360
run_breach() { run_breach() {
local header local header addcmd=""
local -i ret=0 local -i ret=0
local -i was_killed=0 local -i was_killed=0
local referer useragent local referer useragent
@ -4827,7 +4891,8 @@ run_breach() {
useragent="$UA_STD" useragent="$UA_STD"
$SNEAKY && useragent="$UA_SNEAKY" $SNEAKY && useragent="$UA_SNEAKY"
printf "GET $url HTTP/1.1\r\nHost: $NODE\r\nUser-Agent: $useragent\r\nReferer: $referer\r\nConnection: Close\r\nAccept-encoding: gzip,deflate,compress\r\nAccept: text/*\r\n\r\n" | $OPENSSL s_client $OPTIMAL_PROTO $BUGS -quiet -ign_eof -connect $NODEIP:$PORT $PROXY $SNI 1>$TMPFILE 2>$ERRFILE & [[ ! "$OPTIMAL_PROTO" =~ ssl ]] && addcmd="$SNI"
printf "GET $url HTTP/1.1\r\nHost: $NODE\r\nUser-Agent: $useragent\r\nReferer: $referer\r\nConnection: Close\r\nAccept-encoding: gzip,deflate,compress\r\nAccept: text/*\r\n\r\n" | $OPENSSL s_client $OPTIMAL_PROTO $BUGS -quiet -ign_eof -connect $NODEIP:$PORT $PROXY $addcmd 1>$TMPFILE 2>$ERRFILE &
wait_kill $! $HEADER_MAXSLEEP wait_kill $! $HEADER_MAXSLEEP
was_killed=$? # !=0 was killed was_killed=$? # !=0 was killed
result=$(awk '/^Content-Encoding/ { print $2 }' $TMPFILE) result=$(awk '/^Content-Encoding/ { print $2 }' $TMPFILE)
@ -4874,7 +4939,7 @@ run_ssl_poodle() {
cbc_ciphers=$($OPENSSL ciphers -v 'ALL:eNULL' 2>$ERRFILE | awk '/CBC/ { print $1 }' | tr '\n' ':') cbc_ciphers=$($OPENSSL ciphers -v 'ALL:eNULL' 2>$ERRFILE | awk '/CBC/ { print $1 }' | tr '\n' ':')
debugme echo $cbc_ciphers debugme echo $cbc_ciphers
$OPENSSL s_client -ssl3 $STARTTLS $BUGS -cipher $cbc_ciphers -connect $NODEIP:$PORT $PROXY $SNI >$TMPFILE 2>$ERRFILE </dev/null $OPENSSL s_client -ssl3 $STARTTLS $BUGS -cipher $cbc_ciphers -connect $NODEIP:$PORT $PROXY >$TMPFILE 2>$ERRFILE </dev/null
sclient_connect_successful $? $TMPFILE sclient_connect_successful $? $TMPFILE
sclient_success=$? sclient_success=$?
[[ "$DEBUG" -eq 2 ]] && egrep -q "error|failure" $ERRFILE | egrep -av "unable to get local|verify error" [[ "$DEBUG" -eq 2 ]] && egrep -q "error|failure" $ERRFILE | egrep -av "unable to get local|verify error"
@ -4917,7 +4982,12 @@ run_tls_fallback_scsv() {
# c) best to make sure that we hit a specific protocol, see https://alpacapowered.wordpress.com/2014/10/20/ssl-poodle-attack-what-is-this-scsv-thingy/ # c) best to make sure that we hit a specific protocol, see https://alpacapowered.wordpress.com/2014/10/20/ssl-poodle-attack-what-is-this-scsv-thingy/
# d) minor: we should do "-state" here # d) minor: we should do "-state" here
# first: make sure we have tls1_2: # first: make sure SSLv3 or some TLS protocol is supported
if [[ "$OPTIMAL_PROTO" == "-ssl2" ]]; then
pr_svrty_criticalln "No fallback possible, SSLv2 is the only protocol"
return 7
fi
# second: make sure we have tls1_2:
$OPENSSL s_client $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI -no_tls1_2 >$TMPFILE 2>$ERRFILE </dev/null $OPENSSL s_client $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI -no_tls1_2 >$TMPFILE 2>$ERRFILE </dev/null
if ! sclient_connect_successful $? $TMPFILE; then if ! sclient_connect_successful $? $TMPFILE; then
pr_done_good "No fallback possible, TLS 1.2 is the only protocol (OK)" pr_done_good "No fallback possible, TLS 1.2 is the only protocol (OK)"
@ -4966,7 +5036,7 @@ run_freak() {
local -i nr_supported_ciphers=0 local -i nr_supported_ciphers=0
# with correct build it should list these 7 ciphers (plus the two latter as SSLv2 ciphers): # with correct build it should list these 7 ciphers (plus the two latter as SSLv2 ciphers):
local exportrsa_cipher_list="EXP1024-DES-CBC-SHA:EXP1024-RC4-SHA:EXP-EDH-RSA-DES-CBC-SHA:EXP-DH-RSA-DES-CBC-SHA:EXP-DES-CBC-SHA:EXP-RC2-CBC-MD5:EXP-RC2-CBC-MD5:EXP-RC4-MD5:EXP-RC4-MD5" local exportrsa_cipher_list="EXP1024-DES-CBC-SHA:EXP1024-RC4-SHA:EXP-EDH-RSA-DES-CBC-SHA:EXP-DH-RSA-DES-CBC-SHA:EXP-DES-CBC-SHA:EXP-RC2-CBC-MD5:EXP-RC2-CBC-MD5:EXP-RC4-MD5:EXP-RC4-MD5"
local addtl_warning="" local addcmd="" addtl_warning=""
[[ $VULN_COUNT -le $VULN_THRESHLD ]] && outln && pr_headlineln " Testing for FREAK attack " && outln [[ $VULN_COUNT -le $VULN_THRESHLD ]] && outln && pr_headlineln " Testing for FREAK attack " && outln
pr_bold " FREAK"; out " (CVE-2015-0204) " pr_bold " FREAK"; out " (CVE-2015-0204) "
@ -4987,7 +5057,9 @@ run_freak() {
4|5|6|7) 4|5|6|7)
addtl_warning=" (tested with $nr_supported_ciphers/9 ciphers)" ;; addtl_warning=" (tested with $nr_supported_ciphers/9 ciphers)" ;;
esac esac
$OPENSSL s_client $STARTTLS $BUGS -cipher $exportrsa_cipher_list -connect $NODEIP:$PORT $PROXY $SNI >$TMPFILE 2>$ERRFILE </dev/null [[ "$OPTIMAL_PROTO" == "-ssl2" ]] && addcmd="$OPTIMAL_PROTO"
[[ ! "$OPTIMAL_PROTO" =~ ssl ]] && addcmd="$SNI"
$OPENSSL s_client $STARTTLS $BUGS -cipher $exportrsa_cipher_list -connect $NODEIP:$PORT $PROXY $addcmd >$TMPFILE 2>$ERRFILE </dev/null
sclient_connect_successful $? $TMPFILE sclient_connect_successful $? $TMPFILE
sclient_success=$? sclient_success=$?
[[ $DEBUG -eq 2 ]] && egrep -a "error|failure" $ERRFILE | egrep -av "unable to get local|verify error" [[ $DEBUG -eq 2 ]] && egrep -a "error|failure" $ERRFILE | egrep -av "unable to get local|verify error"
@ -5131,7 +5203,7 @@ run_drown() {
# Browser Exploit Against SSL/TLS: don't use CBC Ciphers in SSLv3 TLSv1.0 # Browser Exploit Against SSL/TLS: don't use CBC Ciphers in SSLv3 TLSv1.0
run_beast(){ run_beast(){
local hexcode dash cbc_cipher sslvers kx auth enc mac export local hexcode dash cbc_cipher sslvers kx auth enc mac export addcmd
local detected_proto local detected_proto
local -i sclient_success=0 local -i sclient_success=0
local detected_cbc_ciphers="" local detected_cbc_ciphers=""
@ -5165,7 +5237,9 @@ run_beast(){
done done
for proto in ssl3 tls1; do for proto in ssl3 tls1; do
$OPENSSL s_client -"$proto" $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI >$TMPFILE 2>>$ERRFILE </dev/null addcmd=""
[[ ! "$proto" =~ ssl ]] && addcmd="$SNI"
$OPENSSL s_client -"$proto" $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $addcmd >$TMPFILE 2>>$ERRFILE </dev/null
if ! sclient_connect_successful $? $TMPFILE; then # protocol supported? if ! sclient_connect_successful $? $TMPFILE; then # protocol supported?
if "$continued"; then # second round: we hit TLS1 if "$continued"; then # second round: we hit TLS1
pr_done_goodln "no SSL3 or TLS1 (OK)" pr_done_goodln "no SSL3 or TLS1 (OK)"
@ -5180,7 +5254,7 @@ run_beast(){
# now we test in one shot with the precompiled ciphers # now we test in one shot with the precompiled ciphers
$OPENSSL s_client -"$proto" -cipher "$cbc_cipher_list" $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI >$TMPFILE 2>>$ERRFILE </dev/null $OPENSSL s_client -"$proto" -cipher "$cbc_cipher_list" $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $addcmd >$TMPFILE 2>>$ERRFILE </dev/null
sclient_connect_successful $? $TMPFILE || continue sclient_connect_successful $? $TMPFILE || continue
if "$WIDE"; then if "$WIDE"; then
@ -5192,7 +5266,7 @@ run_beast(){
for ciph in $(colon_to_spaces "$cbc_cipher_list"); do for ciph in $(colon_to_spaces "$cbc_cipher_list"); do
read hexcode dash cbc_cipher sslvers kx auth enc mac < <($OPENSSL ciphers -V "$ciph" 2>>$ERRFILE) # -V doesn't work with openssl < 1.0 read hexcode dash cbc_cipher sslvers kx auth enc mac < <($OPENSSL ciphers -V "$ciph" 2>>$ERRFILE) # -V doesn't work with openssl < 1.0
# ^^^^^ process substitution as shopt will either segfault or doesn't work with old bash versions # ^^^^^ process substitution as shopt will either segfault or doesn't work with old bash versions
$OPENSSL s_client -cipher "$cbc_cipher" -"$proto" $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI >$TMPFILE 2>>$ERRFILE </dev/null $OPENSSL s_client -cipher "$cbc_cipher" -"$proto" $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $addcmd >$TMPFILE 2>>$ERRFILE </dev/null
sclient_connect_successful $? $TMPFILE sclient_connect_successful $? $TMPFILE
sclient_success=$? sclient_success=$?
if [[ $sclient_success -eq 0 ]]; then if [[ $sclient_success -eq 0 ]]; then
@ -5304,7 +5378,7 @@ run_rc4() {
local hexcode dash rc4_cipher sslvers kx auth enc mac export local hexcode dash rc4_cipher sslvers kx auth enc mac export
local rc4_ciphers_list="ECDHE-RSA-RC4-SHA:ECDHE-ECDSA-RC4-SHA:DHE-DSS-RC4-SHA:AECDH-RC4-SHA:ADH-RC4-MD5:ECDH-RSA-RC4-SHA:ECDH-ECDSA-RC4-SHA:RC4-SHA:RC4-MD5:RC4-MD5:RSA-PSK-RC4-SHA:PSK-RC4-SHA:KRB5-RC4-SHA:KRB5-RC4-MD5:RC4-64-MD5:EXP1024-DHE-DSS-RC4-SHA:EXP1024-RC4-SHA:EXP-ADH-RC4-MD5:EXP-RC4-MD5:EXP-RC4-MD5:EXP-KRB5-RC4-SHA:EXP-KRB5-RC4-MD5" local rc4_ciphers_list="ECDHE-RSA-RC4-SHA:ECDHE-ECDSA-RC4-SHA:DHE-DSS-RC4-SHA:AECDH-RC4-SHA:ADH-RC4-MD5:ECDH-RSA-RC4-SHA:ECDH-ECDSA-RC4-SHA:RC4-SHA:RC4-MD5:RC4-MD5:RSA-PSK-RC4-SHA:PSK-RC4-SHA:KRB5-RC4-SHA:KRB5-RC4-MD5:RC4-64-MD5:EXP1024-DHE-DSS-RC4-SHA:EXP1024-RC4-SHA:EXP-ADH-RC4-MD5:EXP-RC4-MD5:EXP-RC4-MD5:EXP-KRB5-RC4-SHA:EXP-KRB5-RC4-MD5"
local rc4_detected="" local rc4_detected=""
local available="" local available="" addcmd=""
if [[ $VULN_COUNT -le $VULN_THRESHLD ]]; then if [[ $VULN_COUNT -le $VULN_THRESHLD ]]; then
outln outln
@ -5315,7 +5389,9 @@ run_rc4() {
fi fi
pr_bold " RC4"; out " (CVE-2013-2566, CVE-2015-2808) " pr_bold " RC4"; out " (CVE-2013-2566, CVE-2015-2808) "
$OPENSSL s_client -cipher $rc4_ciphers_list $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI >$TMPFILE 2>$ERRFILE </dev/null [[ "$OPTIMAL_PROTO" == "-ssl2" ]] && addcmd="$OPTIMAL_PROTO"
[[ ! "$OPTIMAL_PROTO" =~ ssl ]] && addcmd="$SNI"
$OPENSSL s_client -cipher $rc4_ciphers_list $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $addcmd >$TMPFILE 2>$ERRFILE </dev/null
if sclient_connect_successful $? $TMPFILE; then if sclient_connect_successful $? $TMPFILE; then
"$WIDE" || pr_svrty_high "VULNERABLE (NOT ok): " "$WIDE" || pr_svrty_high "VULNERABLE (NOT ok): "
rc4_offered=1 rc4_offered=1
@ -5324,7 +5400,11 @@ run_rc4() {
neat_header neat_header
fi fi
while read hexcode dash rc4_cipher sslvers kx auth enc mac; do while read hexcode dash rc4_cipher sslvers kx auth enc mac; do
$OPENSSL s_client -cipher $rc4_cipher $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI </dev/null >$TMPFILE 2>$ERRFILE if [[ "$sslvers" == "SSLv2" ]]; then
$OPENSSL s_client -cipher $rc4_cipher $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY -ssl2 </dev/null >$TMPFILE 2>$ERRFILE
else
$OPENSSL s_client -cipher $rc4_cipher $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI </dev/null >$TMPFILE 2>$ERRFILE
fi
sclient_connect_successful $? $TMPFILE sclient_connect_successful $? $TMPFILE
sclient_success=$? # here we may have a fp with openssl < 1.0, TBC sclient_success=$? # here we may have a fp with openssl < 1.0, TBC
if [[ $sclient_success -ne 0 ]] && ! "$SHOW_EACH_C"; then if [[ $sclient_success -ne 0 ]] && ! "$SHOW_EACH_C"; then
@ -6201,7 +6281,9 @@ determine_optimal_proto() {
debugme echo "STARTTLS_OPTIMAL_PROTO: $STARTTLS_OPTIMAL_PROTO" debugme echo "STARTTLS_OPTIMAL_PROTO: $STARTTLS_OPTIMAL_PROTO"
else else
for OPTIMAL_PROTO in '' -tls1_2 -tls1 -ssl3 -tls1_1 -ssl2 ''; do for OPTIMAL_PROTO in '' -tls1_2 -tls1 -ssl3 -tls1_1 -ssl2 ''; do
$OPENSSL s_client $OPTIMAL_PROTO $BUGS -connect "$NODEIP:$PORT" -msg $PROXY $SNI </dev/null >$TMPFILE 2>>$ERRFILE addcmd=""
[[ ! "$OPTIMAL_PROTO" =~ ssl ]] && addcmd="$SNI"
$OPENSSL s_client $OPTIMAL_PROTO $BUGS -connect "$NODEIP:$PORT" -msg $PROXY $addcmd </dev/null >$TMPFILE 2>>$ERRFILE
if sclient_auth $? $TMPFILE; then if sclient_auth $? $TMPFILE; then
all_failed=1 all_failed=1
break break