CVE-2021-3939
Last modified
CVE-2021-3939 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.35% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Accountsservice | >= 0.6.55-0ubuntu12\~20.04, < 0.6.55-0ubuntu12\~20.05 |
| Canonical | Accountsservice | >= 0.6.55-0ubuntu13, < 0.6.55-0ubuntu13.3 |
| Canonical | Accountsservice | >= 0.6.55-0ubuntu14, < 0.6.55-0ubuntu14.1 |
| Canonical | Ubuntu Linux | 20.04 |
| Canonical | Ubuntu Linux | 21.04 |
| Canonical | Ubuntu Linux | 21.10 |
References
- https://ubuntu.com/security/notices/USN-5149-1Vendor Advisory
- https://ubuntu.com/security/notices/USN-5149-1Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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