CVE-2021-3939

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

17/11/2021

Last modified:

12/06/2023

Description

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

7.80

Severity 3.x

HIGH

Vector 2.0

AV:L/AC:L/Au:N/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.20 HIGH
Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0

7.20

Severity 2.0

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:canonical:accountsservice::::::::	0.6.55-0ubuntu12\~20.04 (including)	0.6.55-0ubuntu12\~20.05 (excluding)
cpe:2.3:a:canonical:accountsservice::::::::	0.6.55-0ubuntu13 (including)	0.6.55-0ubuntu13.3 (excluding)
cpe:2.3:a:canonical:accountsservice::::::::	0.6.55-0ubuntu14 (including)	0.6.55-0ubuntu14.1 (excluding)
cpe:2.3:o:canonical:ubuntu_linux:20.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:21.04:::::::*
cpe:2.3:o:canonical:ubuntu_linux:21.10:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-3939

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools