Resource exhaustion in Pjsip Pjproject

CVE-2021-21375

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.

Vulnerability class: DoS (Denial of Service)

EPSS: 0.021 (79.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-21375?
CVE-2021-21375 is a medium-severity vulnerability in Pjsip Pjproject, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2021-03-10.
How severe is CVE-2021-21375?
Medium severity. CVSS v3 base score is 6.5 out of 10.