CVE-2022-45873

 

Published at: - 24-11-2022 12:15

Last modified: - 25-11-2022 04:15

Total changes: - 3

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.

Common Vulnerability Scoring System (CVSS)

-

 

Verification logic

 

Reference

• https://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437
• https://github.com/systemd/systemd/pull/25055#issuecomment-1313733553
• https://github.com/systemd/systemd/pull/24853#issuecomment-1326561497

 

Keywords

NVD

 

CVE-2022-45873

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures