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CVE-2021-3939

Published: 16 November 2021

Ubuntu-specific modifications to accountsservice (in patch file debian/patches/0010-set-language.patch) caused the fallback_locale variable, pointing to static storage, to be freed, in the user_change_language_authorized_cb function. This is reachable via the SetLanguage dbus function. This is fixed in versions 0.6.55-0ubuntu12~20.04.5, 0.6.55-0ubuntu13.3, 0.6.55-0ubuntu14.1.

Priority

High

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
accountsservice
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(0.6.45-1ubuntu1.3)
upstream Needs triage

focal
Released (0.6.55-0ubuntu12~20.04.5)
hirsute
Released (0.6.55-0ubuntu13.3)
impish
Released (0.6.55-0ubuntu14.1)
jammy
Released (0.6.55-3ubuntu2)

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H