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CVE-2021-21375 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/pjsip/pjproject/commit/97b3d7addbaa720b7ddb0af9bf6f3e443e664365	CVE	PatchThird Party Advisory
https://github.com/pjsip/pjproject/security/advisories/GHSA-hvq6-f89p-frvp	CVE	ExploitPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/04/msg00023.html	CVE	Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00020.html	CVE	Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202107-42	CVE	Third Party Advisory
https://github.com/pjsip/pjproject/commit/97b3d7addbaa720b7ddb0af9bf6f3e443e664365	[email protected]	PatchThird Party Advisory
https://github.com/pjsip/pjproject/security/advisories/GHSA-hvq6-f89p-frvp	[email protected]	ExploitPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/04/msg00023.html	[email protected]	Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00020.html	[email protected]	Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202107-42	[email protected]	Third Party Advisory

see all 10 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-754	Improper Check for Unusual or Exceptional Conditions	[email protected]
CWE-400	Uncontrolled Resource Consumption	[email protected]

Affected Products

Product	Versions
teluu pjsip	<= 2.10
CPE cpe:2.3:a:teluu:pjsip:::::::: Remediation No remediation found in references.
debian debian linux	9.0
CPE cpe:2.3:o:debian:debian_linux:9.0:::::::* Remediation No remediation found in references.

Change History

10 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Oct 21, 2022	Reanalysis	[email protected]
Sep 2, 2021	Modified Analysis	[email protected]
Jul 20, 2021	CVE Modified	[email protected]
May 26, 2021	Modified Analysis	[email protected]
May 23, 2021	CVE Modified	[email protected]
Apr 23, 2021	CVE Modified	[email protected]
Mar 18, 2021	Initial Analysis	[email protected]