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Vulnerability · Published Nov 23, 2022 · Assigned by mitre

CVE-2022-45873

Medium 5.5

In plain English

A medium-severity uncontrolled resource consumption in the systemd package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.3%top 80.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9systemd250-12.el9_1.3ALSA-2023:0954
AlmaLinux:9systemd-container250-12.el9_1.3ALSA-2023:0954
AlmaLinux:9systemd-devel250-12.el9_1.3ALSA-2023:0954
AlmaLinux:9systemd-journal-remote250-12.el9_1.3ALSA-2023:0954
AlmaLinux:9systemd-libs250-12.el9_1.3ALSA-2023:0954
AlmaLinux:9systemd-oomd250-12.el9_1.3ALSA-2023:0954
AlmaLinux:9systemd-pam250-12.el9_1.3ALSA-2023:0954
AlmaLinux:9systemd-resolved250-12.el9_1.3ALSA-2023:0954
AlmaLinux:9systemd-rpm-macros250-12.el9_1.3ALSA-2023:0954
AlmaLinux:9systemd-udev250-12.el9_1.3ALSA-2023:0954
Debian:12systemd252-1DEBIAN-CVE-2022-45873
Debian:13systemd252-1DEBIAN-CVE-2022-45873
Debian:14systemd252-1DEBIAN-CVE-2022-45873
Rocky Linux:9systemd0:250-12.el9_1.3RLSA-2023:0954

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-400 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References