CVE-2021-43804
Published: 22 December 2021
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 affected versions if the incoming RTCP BYE message contains a reason's length, this declared length is not checked against the actual received packet size, potentially resulting in an out-of-bound read access. This issue affects all users that use PJMEDIA and RTCP. A malicious actor can send a RTCP BYE message with an invalid reason length. Users are advised to upgrade as soon as possible. There are no known workarounds.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
pjproject Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| trusty |
Ignored
(end of standard support)
|
|
| upstream |
Needs triage
|
|
| xenial |
Needs triage
|
|
|
ring Launchpad, Ubuntu, Debian |
bionic |
Released
(20180228.1.503da2b~ds1-1ubuntu0.1~esm1)
Available with Ubuntu Pro |
| focal |
Released
(20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1)
|
|
| impish |
Ignored
(end of life)
|
|
| lunar |
Not vulnerable
(20230206.0~ds1-5)
|
|
| mantic |
Not vulnerable
(20230206.0~ds2-1.3)
|
|
| noble |
Does not exist
|
|
| trusty |
Ignored
(end of standard support)
|
|
| upstream |
Needs triage
|
|
| xenial |
Ignored
(end of standard support)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.3 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | Low |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |