CVE-2021-3939 HIGH

CVE-2021-3939: Free of static data in accountsservice

Vendor Ubuntu
Product accountsservice
Weakness CWE-590
Published November 17, 2021
Last update September 16, 2024
View on NVD All CVEs

CVSS base score

7.8/10
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

November 17, 2021 CVE published
September 16, 2024 Record updated