CVE-2022-45873

MEDIUM
Published Nov 23, 20223y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Nov 23, 2022 3y ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-400 Uncontrolled Resource Consumption Resource Mgmt

Affected Products 4

VendorProductVersionRange
systemd_projectsystemd*≥250  –  ≤251
systemd_projectsystemd252any
systemd_projectsystemd252any
fedoraprojectfedora36any

References 4

  • github.com https://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437
    PatchThird Party Advisory
  • github.com https://github.com/systemd/systemd/pull/24853#issuecomment-1326561497
    Issue TrackingPatchThird Party Advisory
  • github.com https://github.com/systemd/systemd/pull/25055#issuecomment-1313733553
    Issue TrackingPatchThird Party Advisory
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MS5N5SLYAHKENLAJWYBDKU55ICU3SVZF/

Remediation

  • github.com https://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437
    PatchThird Party Advisory
  • github.com https://github.com/systemd/systemd/pull/24853#issuecomment-1326561497
    Issue TrackingPatchThird Party Advisory
  • github.com https://github.com/systemd/systemd/pull/25055#issuecomment-1313733553
    Issue TrackingPatchThird Party Advisory