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Vulnerability · Published Mar 10, 2021 · Assigned by GitHub_M

CVE-2021-21375Crash in receiving updated SDP answer after initial SDP negotiation failed

Medium 6.5

In plain English

A medium-severity uncontrolled resource consumption in pjproject from pjsip. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.1% (higher than 82% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)2.1%top 18.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In PJSIP version 2.10 and earlier, after an initial INVITE has been sent, when two 183 responses are received, with the first one causing negotiation failure, a crash will occur. This results in a denial of service.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20pjproject2.11-r0ALPINE-CVE-2021-21375
Alpine:v3.21pjproject2.11-r0ALPINE-CVE-2021-21375
Alpine:v3.22pjproject2.11-r0ALPINE-CVE-2021-21375
Alpine:v3.23pjproject2.11-r0ALPINE-CVE-2021-21375
Alpine:v3.24pjproject2.11-r0ALPINE-CVE-2021-21375
Debian:12ring20210112.2.b757bac~ds1-1DEBIAN-CVE-2021-21375

Affected products (as reported)

VendorProductVersions
pjsip pjproject <= 2.10

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References