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Vulnerability · Published Feb 16, 2022 · Assigned by JFROG

CVE-2021-43300

Critical 9.8

In plain English

A critical-severity stack buffer overflow in pjsip from teluu. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.4% (higher than 84% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)2.4%top 16.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

Stack overflow in PJSUA API when calling pjsua_recorder_create. An attacker-controlled 'filename' argument may cause a buffer overflow since it is copied to a fixed-size stack buffer without any size validation.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20pjproject2.12-r0ALPINE-CVE-2021-43300
Alpine:v3.21pjproject2.12-r0ALPINE-CVE-2021-43300
Alpine:v3.22pjproject2.12-r0ALPINE-CVE-2021-43300
Alpine:v3.23pjproject2.12-r0ALPINE-CVE-2021-43300
Alpine:v3.24pjproject2.12-r0ALPINE-CVE-2021-43300
Debian:14asterisk1:18.11.1~dfsg+~cs6.10.40431413-1DEBIAN-CVE-2021-43300
Debian:12ring20230206.0~ds1-1DEBIAN-CVE-2021-43300
Ubuntu:22.04:LTSasteriskno fix listedUBUNTU-CVE-2021-43300
Ubuntu:24.04:LTSasteriskno fix listedUBUNTU-CVE-2021-43300
Ubuntu:25.10asteriskno fix listedUBUNTU-CVE-2021-43300
Ubuntu:26.04:LTSasteriskno fix listedUBUNTU-CVE-2021-43300
Ubuntu:26.10asteriskno fix listedUBUNTU-CVE-2021-43300

Affected products (as reported)

VendorProductVersions
teluu pjsip unspecified – through 2.11.1

Weakness: CWE-121

References