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CVE-2022-45873

Date: November 22, 2022

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.

Language: C

Severity Score

Related Resources (10)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MS5N5SLYAHKENLAJWYBDKU55ICU3SVZF/
https://security-tracker.debian.org/tracker/CVE-2022-45873
https://github.com/systemd/systemd/pull/25055#issuecomment-1313733553
https://github.com/systemd/systemd/pull/24853#issuecomment-1326561497
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MS5N5SLYAHKENLAJWYBDKU55ICU3SVZF/
https://access.redhat.com/security/cve/CVE-2022-45873
https://nvd.nist.gov/vuln/detail/CVE-2022-45873
https://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437
https://people.canonical.com/~ubuntu-security/cve/CVE-2022-45873
https://www.mend.io/vulnerability-database/CVE-2022-45873

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption

CWE-400

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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