CVE-2021-3939

Free of static data in accountsservice

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.

Affected

Ubuntu · accountsservice

CVSS v3.1 NVD

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 UBUNTU

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

CVSS v2.0 NVD

7.2 HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS

0.37% chance of exploitation in the next 30 days, 30th percentile

Published

2021-11-17

Updated

2024-09-16

Exploit collections (1)

• Ubuntu/accountsservice_CVE-2021-3939github/securitylab

Security advisories

• https://ubuntu.com/security/notices/USN-5149-1

References

• CVE Record
• NVD entry