CVE-2021-3939

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.

CVSS v3 7.8 HIGH
CVSS v2.0 7.2 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.2^/10

CVSS v2.0 : HIGH

Vector : AV:L/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
http://packetstormsecurity.com/files/172848/Ubuntu-accountsservice-Double-Free-Memory-Corruption.html
https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/1950149	Broken Link
https://ubuntu.com/security/notices/USN-5149-1	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:canonical:accountsservice::::::::
	cpe:2.3:a:canonical:accountsservice::::::::
	cpe:2.3:a:canonical:accountsservice::::::::

Configuration 2 (hide)

OR	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:::::::*

History

No history.

Information

Published : 2021-11-17 04:15

Updated : 2023-06-12 07:16

NVD link : CVE-2021-3939

Mitre link : CVE-2021-3939

CVE.ORG link : CVE-2021-3939

JSON object : View

Products Affected

canonical

ubuntu_linux
accountsservice

CWE

CWE-763

Release of Invalid Pointer or Reference

CWE-590

Free of Memory not on the Heap

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