CVE-2021-37706 is a critical vulnerability in PJSIP, a multimedia communication library used by products like Asterisk and Debian. It involves an integer underflow when processing specially crafted STUN messages, allowing a malicious actor on the same network to remotely execute arbitrary code. With a CVSS score of 9.8, this vulnerability is highly severe, requiring no user interaction or complex attack conditions, and can lead to complete compromise of confidentiality, integrity, and availability. While no active exploitation or public exploit code is currently known, and community discussion is minimal, immediate upgrades are advised due to the high risk.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 2.11.1CPE matchmatch criteria | cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:* | ||
< 16.8.0CPE matchmatch criteria | cpe:2.3:a:asterisk:certified_asterisk:*:*:*:*:*:*:*:* | ||
16.8.0CPE matchmatch criteria | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:*:*:*:*:*:*:* | ||
16.8.0CPE matchmatch criteria | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert1:*:*:*:*:*:* | ||
16.8.0CPE matchmatch criteria | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert10:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.