CVE catalog

CVE-2021-21375

ring: CVE-2021-21375

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published: Mar 8, 2021, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 2.08% · Oct 27, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	ring	bookworm	`20230206.0~ds2-1.1+deb12u1`	fixed
Debian	ring	bookworm-security	`20230206.0~ds2-1.1+deb12u1`	fixed
Alpine	pjproject	3.14	`2.11-r0`	fixed
Alpine	pjproject	3.15	`2.11-r0`	fixed
Alpine	pjproject	3.16	`2.11-r0`	fixed
Alpine	pjproject	3.17	`2.11-r0`	fixed
Alpine	pjproject	3.18	`2.11-r0`	fixed
Alpine	pjproject	3.19	`2.11-r0`	fixed
Alpine	pjproject	3.20	`2.11-r0`	fixed
Alpine	pjproject	3.21	`2.11-r0`	fixed
Alpine	pjproject	3.22	`2.11-r0`	fixed
Alpine	pjproject	3.23	`2.11-r0`	fixed
Alpine	pjproject	3.24	`2.11-r0`	fixed
Ubuntu	pjproject	pro	`2.6~dfsg-2`	vulnerable
Ubuntu	pjproject	pro	`2.7~dfsg-1`	vulnerable
Ubuntu	pjproject	pro	`2.7.1~dfsg-1`	vulnerable
Ubuntu	pjproject	pro	`2.7.1~dfsg-1build1`	vulnerable
Ubuntu	pjproject	pro	`2.7.2~dfsg-1`	vulnerable
Ubuntu	pjproject	pro	`2.7.2~dfsg-1ubuntu0.1~esm1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	ring	source	bookworm	`20210112.2.b757bac~ds1-1`	not yet assigned	Not reported	[986815]
Alpine	pjproject	apk	3.14	`2.11-r0`	Not reported	ALPINE-CVE-2021-21375	Not reported
Alpine	pjproject	apk	3.15	`2.11-r0`	Not reported	ALPINE-CVE-2021-21375	Not reported
Alpine	pjproject	apk	3.16	`2.11-r0`	Not reported	ALPINE-CVE-2021-21375	Not reported
Alpine	pjproject	apk	3.17	`2.11-r0`	Not reported	ALPINE-CVE-2021-21375	Not reported
Alpine	pjproject	apk	3.18	`2.11-r0`	Not reported	ALPINE-CVE-2021-21375	Not reported
Alpine	pjproject	apk	3.19	`2.11-r0`	Not reported	ALPINE-CVE-2021-21375	Not reported
Alpine	pjproject	apk	3.20	`2.11-r0`	Not reported	ALPINE-CVE-2021-21375	Not reported
Alpine	pjproject	apk	3.21	`2.11-r0`	Not reported	ALPINE-CVE-2021-21375	Not reported
Alpine	pjproject	apk	3.22	`2.11-r0`	Not reported	ALPINE-CVE-2021-21375	Not reported
Alpine	pjproject	apk	3.23	`2.11-r0`	Not reported	ALPINE-CVE-2021-21375	Not reported
Alpine	pjproject	apk	3.24	`2.11-r0`	Not reported	ALPINE-CVE-2021-21375	Not reported
Ubuntu	pjproject	deb	pro	`2.7.2~dfsg-1ubuntu0.1~esm1`	Not reported	UBUNTU-CVE-2021-21375	Not reported

[Debian bug #986815]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[jami]Fixed
Source package: [ring]
Details (4)
- 20230206.0~ds2-1.1+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 20210112.2.b757bac~ds1-1
  dsa · ring · debian · bookworm; dsa · ring · debian · 12
- 20230206.0~ds2-1.1+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 20210112.2.b757bac~ds1-1
  dsa · ring · debian · bookworm; dsa · ring · debian · 12
- 20230206.0~ds2-1.1+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 20210112.2.b757bac~ds1-1
  dsa · ring · debian · bookworm; dsa · ring · debian · 12
- 20230206.0~ds2-1.1+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 20210112.2.b757bac~ds1-1
  dsa · ring · debian · bookworm; dsa · ring · debian · 12
[jami-daemon]Fixed
Source package: [ring]
Details (4)
- 20230206.0~ds2-1.1+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 20210112.2.b757bac~ds1-1
  dsa · ring · debian · bookworm; dsa · ring · debian · 12
- 20230206.0~ds2-1.1+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 20210112.2.b757bac~ds1-1
  dsa · ring · debian · bookworm; dsa · ring · debian · 12
- 20230206.0~ds2-1.1+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 20210112.2.b757bac~ds1-1
  dsa · ring · debian · bookworm; dsa · ring · debian · 12
- 20230206.0~ds2-1.1+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 20210112.2.b757bac~ds1-1
  dsa · ring · debian · bookworm; dsa · ring · debian · 12

Observed: Oct 23, 2026, 5:54:40 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]