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testssl.sh
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Fixes: 

- Add safety gards againts infinite sleep loop
- correct the for loop test
- reverse the watchdog file logic for sleep loop. No timing dependance.
This commit is contained in:
Emmanuel Fusté 2024-03-04 18:48:21 +01:00
parent 8627ba518f
commit 81167dc908
1 changed files with 6 additions and 8 deletions
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14
testssl.sh
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@ -17107,13 +17107,14 @@ run_renego() {
else
# Clear the log to not get the content of previous run before the execution of the new one.
echo -n > $TMPFILE
touch $TEMPDIR/not_killed
# If we dont wait for the session to be established on slow server, we will try to re-negotiate
# too early losing all the attempts before the session establishment as OpenSSL will not buffer them
# (only the first will be till the establishement of the session).
(while [[ $(grep -ac '^SSL-Session:' $TMPFILE) -ne 1 ]]; do sleep $ssl_reneg_wait; done; \
for ((i=0; i < ssl_reneg_attempts; i++ )); do echo R; sleep $ssl_reneg_wait; \
while [[ $(grep -ac '^RENEGOTIATING' $ERRFILE) -ne $(($i+3)) ]] && [[ ! -f $TEMPDIR/was_killed ]]; \
do sleep $ssl_reneg_wait; done; \
(j=0; while [[ $(grep -ac '^SSL-Session:' $TMPFILE) -ne 1 ]] && [[ $j -lt 30 ]]; do sleep $ssl_reneg_wait; j=$(($j+1)); done; \
for ((i=0; i < $ssl_reneg_attempts; i++ )); do echo R; sleep $ssl_reneg_wait; j=0; \
while [[ $(grep -ac '^RENEGOTIATING' $ERRFILE) -ne $(($i+3)) ]] && [[ -f $TEMPDIR/not_killed ]] && [[ $k -lt 180 ]]; \
do sleep $ssl_reneg_wait; k=$(($k+1)); done; \
done) | \
$OPENSSL s_client $(s_client_options "$proto $legacycmd $STARTTLS $BUGS -connect $NODEIP:$PORT $PROXY $SNI") >$TMPFILE 2>>$ERRFILE &
pid=$!
@ -17128,10 +17129,7 @@ run_renego() {
loop_reneg=$(($(grep -ac '^RENEGOTIATING' $ERRFILE )-2))
if [[ -f $TEMPDIR/was_killed ]]; then
tmp_result=2
sleep $ssl_reneg_wait # let the while loop see the watchdog file
sleep $ssl_reneg_wait # and
sleep $ssl_reneg_wait # avoid float arithmetic
rm -f $TEMPDIR/was_killed
rm -f $TEMPDIR/not_killed
fi
case $tmp_result in
0) pr_svrty_high "VULNERABLE (NOT ok)"; outln ", DoS threat ($ssl_reneg_attempts attempts)"