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Vulnerability · Published Jul 20, 2021 · Assigned by mitre

CVE-2021-33910

Medium 5.5

In plain English

A medium-severity resource allocation without limits in the systemd package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 8.8% (higher than 95% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)8.8%top 4.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12systemd247.3-6DEBIAN-CVE-2021-33910
Debian:13systemd247.3-6DEBIAN-CVE-2021-33910
Debian:14systemd247.3-6DEBIAN-CVE-2021-33910
Rocky Linux:8systemd0:239-45.el8_4.2RLSA-2021:2717

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-770 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References