CVE-2022-45873

NameCVE-2022-45873
Descriptionsystemd 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
systemd (PTS)buster, buster (security)241-7~deb10u8fixed
bullseye247.3-7+deb11u1fixed
bookworm252.1-1fixed
sid252.2-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
systemdsourcebuster(not affected)
systemdsourcebullseye(not affected)
systemdsource(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)

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