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CVE-2021-33910

Published: 20 July 2021

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.

Priority

High

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
systemd
Launchpad, Ubuntu, Debian
jammy
Released (248.3-1ubuntu3)
trusty Not vulnerable

upstream Needs triage

bionic
Released (237-3ubuntu10.49)
focal
Released (245.4-4ubuntu3.10)
groovy
Released (246.6-1ubuntu1.7)
hirsute
Released (247.3-3ubuntu3.4)
xenial
Released (229-4ubuntu21.31+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
impish
Released (248.3-1ubuntu3)
Patches:
upstream: https://github.com/systemd/systemd/pull/20256

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H