| Name | CVE-2022-45873 |
| Description | systemd 250 and 251 allows local users to achieve a systemd-coredump deadlock by triggering a crash that has a long backtrace. This occurs in parse_elf_object in shared/elf-util.c. The exploitation methodology is to crash a binary calling the same function recursively, and put it in a deeply nested directory to make its backtrace large enough to cause the deadlock. This must be done 16 times when MaxConnections=16 is set for the systemd/units/systemd-coredump.socket file. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| systemd (PTS) | bullseye | 247.3-7+deb11u5 | fixed |
| bullseye (security) | 247.3-7+deb11u6 | fixed |
| bookworm | 252.31-1~deb12u1 | fixed |
| sid, trixie | 257~rc2-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| systemd | source | buster | (not affected) | | | |
| systemd | source | bullseye | (not affected) | | | |
| systemd | source | (unstable) | 252-1 | | | |
Notes
[bullseye] - systemd <not-affected> (Vulnerable code introduced later)
[buster] - systemd <not-affected> (Vulnerable code introduced later)
https://github.com/systemd/systemd/pull/25055#issuecomment-1313733553
Fixed by: https://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437 (v252-rc3)
Introduced by: https://github.com/systemd/systemd/commit/61aea456c12c54f49c4a76259af130e576130ce9 (v250-rc1)