Public bug reported: [ Impact ]
* This issue causes a crash in openscap when there's a circular dependency in systemd services, and currently affects both Ubuntu 20.04 and 22.04. * This indirectly is affecting the usage of USG (Ubuntu Security Guide) for CIS auditing in systems with ceph-mds. See LP: #2060345. * This issue was reported to upstream here: https://bugzilla.redhat.com/show_bug.cgi?id=1478285 and later fixed in openscap upstream git repo https://github.com/OpenSCAP/openscap/pull/1474. This SRU is a backport of the mentioned pull request. [ Test Plan ] * There are a few ways to reproduce this issue, as you can see some notes on LP: #2060345. But for simplicity, the easiest way to reproduce this issue is to run the following commands. Without the patch on Ubuntu 20.04: ``` $ oscap oval eval --id "oval:ssg-service_rsyslog_enabled:def:1" ssg-ubuntu2004-oval.xml W: oscap: Can't receive message: 103, Software caused connection abort. W: oscap: Can't receive message: 103, Software caused connection abort. OpenSCAP Error: Probe with PID=1522 has been killed with signal 11 [../../../../../src/OVAL/probes/SEAP/sch_pipe.c:178] Probe with PID=1522 has core dumped. [../../../../../src/OVAL/probes/SEAP/sch_pipe.c:182] Item corresponding to object 'oval:ssg-object_multi_user_target_for_rsyslog_enabled:obj:1' from test 'oval:ssg-test_multi_user_wants_rsyslog:tst:1' has an unknown flag. This may indicate a bug in OpenSCAP. [../../../../src/OVAL/results/oval_resultTest.c:913] Probe with PID=1531 has been killed with signal 11 [../../../../../src/OVAL/probes/SEAP/sch_pipe.c:178] Probe with PID=1531 has core dumped. [../../../../../src/OVAL/probes/SEAP/sch_pipe.c:182] Item corresponding to object 'oval:ssg-object_multi_user_target_for_rsyslog_socket_enabled:obj:1' from test 'oval:ssg-test_multi_user_wants_rsyslog_socket:tst:1' has an unknown flag. This may indicate a bug in OpenSCAP. [../../../../src/OVAL/results/oval_resultTest.c:913] ``` With the patch on Ubuntu 20.04: ``` $ sudo apt install libopenscap8=1.2.16-2ubuntu3.4 $ oscap oval eval --id "oval:ssg-service_rsyslog_enabled:def:1" ssg-ubuntu2004-oval.xml Definition oval:ssg-service_rsyslog_enabled:def:1: true Evaluation done. ``` Without the patch on Ubuntu 22.04: ``` $ oscap oval eval --id "oval:ssg-service_rsyslog_enabled:def:1" ssg-ubuntu2204-oval.xml W: oscap: Can't receive message: 103, Software caused connection abort. W: oscap: Can't receive message: 103, Software caused connection abort. OpenSCAP Error: Probe with PID=1421 has been killed with signal 11 [../../../../../src/OVAL/probes/SEAP/sch_pipe.c:178] Probe with PID=1421 has core dumped. [../../../../../src/OVAL/probes/SEAP/sch_pipe.c:182] Item corresponding to object 'oval:ssg-object_multi_user_target_for_rsyslog_enabled:obj:1' from test 'oval:ssg-test_multi_user_wants_rsyslog:tst:1' has an unknown flag. This may indicate a bug in OpenSCAP. [../../../../src/OVAL/results/oval_resultTest.c:982] Probe with PID=1431 has been killed with signal 11 [../../../../../src/OVAL/probes/SEAP/sch_pipe.c:178] Probe with PID=1431 has core dumped. [../../../../../src/OVAL/probes/SEAP/sch_pipe.c:182] Item corresponding to object 'oval:ssg-object_multi_user_target_for_rsyslog_socket_enabled:obj:1' from test 'oval:ssg-test_multi_user_wants_rsyslog_socket:tst:1' has an unknown flag. This may indicate a bug in OpenSCAP. [../../../../src/OVAL/results/oval_resultTest.c:982] ``` With the patch on Ubuntu 22.04: ``` $ sudo apt install libopenscap8=1.2.17-0.1ubuntu7.22.04.2 $ oscap oval eval --id "oval:ssg-service_rsyslog_enabled:def:1" ssg-ubuntu2204-oval.xml Definition oval:ssg-service_rsyslog_enabled:def:1: true Evaluation done. ``` * The other tests we will do is to run full usg fix and audit and report if the output is as expected. [ Where problems could occur ] * This fix was never backported to version 1.2 in upstream git repo, but was applied to openscap 1.2 in RHEL-based distros, it is unclear if the backport ever created another issue with the systemdunitdependency probe. If that is the case we expect to see some other tests in usg failing, for example. [ Other Info ] * This issue affects both Ubuntu 20.04 and 22.04. ** Affects: openscap (Ubuntu) Importance: Undecided Status: New ** Affects: openscap (Ubuntu Focal) Importance: Undecided Status: New ** Affects: openscap (Ubuntu Jammy) Importance: Undecided Status: New ** Also affects: openscap (Ubuntu Focal) Importance: Undecided Status: New ** Also affects: openscap (Ubuntu Jammy) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062389 Title: [SRU] Fix segfault in systemdunitdependency probe To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openscap/+bug/2062389/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
