[VERIFICATION XENIAL] * Feedback #1:
>From an impacted user: " They confirmed that from their perspective the test is OK, and the apache2 packages are delivering expected result " * Feedback #2: >From SustEng Mauricio (mfo): " The backport in xenial-proposed worked exactly as eoan (with the AcceptFilter bits mentioned in previous comment) ... " ** Description changed: [Impact] When running TCP Defensics suite which sends corrupt packages towards vip__public port 443, the suite is hanging after the half suite because there are no free connections. The connections will be in state "established" ~ 2 hours. 1.2. Detailed trouble description # ip netns exec haproxy netstat -npea | grep XXX.XXX.XXX.XXX | grep -i establish | grep 443 tcp 0 0 XXX.XXX.XXX.XXX:443 YYY.YY.YYY.YY:2940 ESTABLISHED 115 81148003 29817/haproxy tcp 0 0 XXX.XXX.XXX.XXX:443 YY.YY.YYY.YY:24979 ESTABLISHED 115 81802005 29817/haproxy tcp 0 0 XXX.XXX.XXX.XXX:443 YY.YY.YYY.YY:19394 ESTABLISHED 115 81782263 29817/haproxy tcp 0 0 XXX.XXX.XXX.XXX:443 YY.YY.YYY.YY:13931 ESTABLISHED 115 81752052 29817/haproxy tcp 0 0 XXX.XXX.XXX.XXX:443 YY.YY.YYY.YY:12668 ESTABLISHED 115 81743719 29817/haproxy tcp 0 0 XXX.XXX.XXX.XXX:443 YY.YY.YYY.YY:2961 ESTABLISHED 115 81139548 29817/haproxy tcp 0 0 XXX.XXX.XXX.XXX:443 YY.YY.YYY.YY:8918 ESTABLISHED 115 81738132 29817/haproxy tcp 0 0 XXX.XXX.XXX.XXX:443 YY.YY.YYY.YY:2957 ESTABLISHED 115 81148041 29817/haproxy tcp 0 0 XXX.XXX.XXX.XXX:443 YY.YY.YYY.YY:10552 ESTABLISHED 115 81744903 29817/haproxy This issue can be resolved by enabling the parameter(mod_reqtimeout). This parameter is available in apache 2.4.39 (released on 2019-04-01). [Test Case] This test case has been brought to my attention by an impacted user: " You must have an apache2 server, with an haproxy in front of it, and you initiate SSL connections with "nc" between 50 and 8000 connections and because the SSL connection process is never finished all those connections get stucked and never timeout. " + Reproducer (Thanks to Szilard): + https://pastebin.ubuntu.com/p/6Hk64CDc7H/ + [Regression Potential] * The backport already exist in Bionic/Disco (done by security team via the security channel) * It is also backported upstream into 2.4 (branch : 2.4.x) * It was tested pre-release by an impacted user, and the outcome was positive: "I have tested the below packages for enabling handshake parameter(mod_reqtimeout) in apache. Looks the package is working fine. " * Local autopkgtest inside qemu, revealed no issues: autopkgtest [12:09:48]: @@@@@@@@@@@@@@@@@@@@ summary duplicate-module-load PASS htcacheclean PASS ssl-passphrase PASS chroot PASS - [Other Info] [Original description] Backport the handshake feature in mod_reqtimeout (in Apache 2.4.39) to Apache 2.4.18. Lack of this feature was exhausting free connections when sent corrupted packets. ** Tags removed: verification-needed-xenial ** Tags added: verification-done-xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1846138 Title: backport mod_reqtimeout with handshake support To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1846138/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
