Critical severity · published Feb 16, 2022
CVE-2021-43303
Buffer overflow in PJSUA API when calling pjsua_call_dump
9.8
CVSS
2.4%
EPSS
No
On KEV
Description
Buffer overflow in PJSUA API when calling pjsua_call_dump. An attacker-controlled 'buffer' argument may cause a buffer overflow, since supplying an output buffer smaller than 128 characters may overflow the output buffer, regardless of the 'maxlen' argument supplied
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.4% · higher than 84% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0; 10.0; 11.0 · source: NVD
PJ
Pjsip · Teluu
through 2.11.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43303
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43303
Patch
https://github.com/pjsip/pjproject/security/advisories/GHSA-qcvw-h34v-c7r9
Mailing List
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html
Mailing List
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html
lists.debian.org
https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html
Third Party Advisory
https://www.debian.org/security/2022/dsa-5285
lists.debian.org
https://lists.debian.org/debian-lts-announce/2024/09/msg00030.html
More from Debian Linux
10.0
CVE-2025-32433
Erlang/OTP SSH Vulnerable to Pre-Authentication RCE
10.0
CVE-2025-24201
Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability
10.0
CVE-2021-44228
Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
10.0
CVE-2015-3306
ProFTPD Improper Access Control Vulnerability
9.8
CVE-2026-24061
GNU InetUtils Argument Injection Vulnerability