Vulnerability Details CVE-2022-45873
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 2.8%
CVSS Severity
CVSS v3 Score 5.5
References
- https://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437
- https://github.com/systemd/systemd/pull/24853#issuecomment-1326561497
- https://github.com/systemd/systemd/pull/25055#issuecomment-1313733553
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MS5N5SLYAHKENLAJWYBDKU55ICU3SVZF/
- https://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437
- https://github.com/systemd/systemd/pull/24853#issuecomment-1326561497
- https://github.com/systemd/systemd/pull/25055#issuecomment-1313733553
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MS5N5SLYAHKENLAJWYBDKU55ICU3SVZF/
Products affected by CVE-2022-45873
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cpe:2.3:a:systemd_project:systemd:250
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cpe:2.3:a:systemd_project:systemd:250.1
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cpe:2.3:a:systemd_project:systemd:250.2
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cpe:2.3:a:systemd_project:systemd:250.3
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cpe:2.3:a:systemd_project:systemd:250.4
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cpe:2.3:a:systemd_project:systemd:250.5
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cpe:2.3:a:systemd_project:systemd:251
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cpe:2.3:a:systemd_project:systemd:252
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cpe:2.3:o:fedoraproject:fedora:36