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.

Score

CVSS 3.1 7.8 High

Status

Modified - security@ubuntu.com

Published

2021-11-17

Last modified

2024-09-16

Weaknesses

CWE-590, CWE-763

Affected products

• Accountsservice (Canonical)
• Ubuntu Linux (Canonical)
• Accountsservice (Ubuntu)

References

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