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.
Does this matter?
Lower severity and a low EPSS score (0.27%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.27% probability · 19th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- systemd project/systemd · fedoraproject/fedora
- Source
- cve@mitre.org
References
- https://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437Patch, Third Party Advisory
- https://github.com/systemd/systemd/pull/24853#issuecomment-1326561497Issue Tracking, Patch, Third Party Advisory
- https://github.com/systemd/systemd/pull/25055#issuecomment-1313733553Issue Tracking, Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MS5N5SLYAHKENLAJWYBDKU55ICU3SVZF/
- https://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437Patch, Third Party Advisory
- https://github.com/systemd/systemd/pull/24853#issuecomment-1326561497Issue Tracking, Patch, Third Party Advisory
- https://github.com/systemd/systemd/pull/25055#issuecomment-1313733553Issue Tracking, Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MS5N5SLYAHKENLAJWYBDKU55ICU3SVZF/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.