CVE-2021-3939 is a high-severity vulnerability affecting Ubuntu's accountsservice, specifically due to an Ubuntu-specific patch that incorrectly frees a static storage variable. This memory corruption vulnerability is reachable via the SetLanguage D-Bus function. A successful exploit could lead to local privilege escalation, allowing an attacker to gain root access with high impact on confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered some community discussion and media coverage, indicating awareness.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 0.6.55-0ubuntu12\~20.04, < 0.6.55-0ubuntu12\~20.05CPE matchmatch criteria | cpe:2.3:a:canonical:accountsservice:*:*:*:*:*:*:*:* | ||
>= 0.6.55-0ubuntu13, < 0.6.55-0ubuntu13.3CPE matchmatch criteria | cpe:2.3:a:canonical:accountsservice:*:*:*:*:*:*:*:* | ||
>= 0.6.55-0ubuntu14, < 0.6.55-0ubuntu14.1CPE matchmatch criteria | cpe:2.3:a:canonical:accountsservice:*:*:*:*:*:*:*:* | ||
20.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* | ||
21.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.