CVE-2021-43303 is a critical buffer overflow vulnerability (CWE-120) in the PJSUA API, specifically within the pjsua_call_dump function, affecting Debian Linux and Teluu PJSIP. An attacker can exploit this by providing a 'buffer' argument smaller than 128 characters, leading to a buffer overflow regardless of the 'maxlen' argument. With a CVSS score of 9.8 (Critical), this vulnerability allows for complete compromise of confidentiality, integrity, and availability with low attack complexity and no user interaction required. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 2.11.1CPE matchmatch criteria | cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:* | ||
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | ||
10.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | ||
11.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.