Exploit Report

Computer Security And Bug Information

CVE-2022-45873

CVECVE-2022-45873
CVE Title
Published Date2022-11-23T23:15Z
Modified Date2022-12-01T14:33Z
CWE TypeCWE-400
CVSS 3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.
References
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Reference URLhttps://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437
Reference DescriptionMISC https://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437
Reference URLhttps://github.com/systemd/systemd/pull/25055#issuecomment-1313733553
Reference DescriptionMISC https://github.com/systemd/systemd/pull/25055#issuecomment-1313733553
Reference URLhttps://github.com/systemd/systemd/pull/24853#issuecomment-1326561497
Reference DescriptionMISC https://github.com/systemd/systemd/pull/24853#issuecomment-1326561497
TagsPatch Third Party Advisory
Sources NIST MITRE

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