CVE-2021-43845

Published: 27 December 2021

PJSIP is a free and open source multimedia communication library. In version 2.11.1 and prior, if incoming RTCP XR message contain block, the data field is not checked against the received packet size, potentially resulting in an out-of-bound read access. This affects all users that use PJMEDIA and RTCP XR. A malicious actor can send a RTCP XR message with an invalid packet size.

Priority

Cvss 3 Severity Score

9.1

Score breakdown

Status

Package	Release	Status
pjproject Launchpad, Ubuntu, Debian	upstream	Needs triage
	bionic	Needs triage
	trusty	Ignored (end of standard support)
	xenial	Needs triage
ring Launchpad, Ubuntu, Debian	trusty	Ignored (end of standard support)
	xenial	Ignored (end of standard support)
	impish	Ignored (end of life)
	upstream	Needs triage
	lunar	Not vulnerable (20230206.0~ds1-5)
	bionic	Released (20180228.1.503da2b~ds1-1ubuntu0.1~esm1) Available with Ubuntu Pro
	focal	Released (20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1)
	mantic	Not vulnerable (20230206.0~ds2-1.3)
asterisk Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	impish	Ignored (end of life)
	xenial	Needs triage
	kinetic	Ignored (end of life, was needs-triage)
	jammy	Needs triage
	lunar	Needs triage
	mantic	Needs triage

Severity score breakdown

Parameter	Value
Base score	9.1
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

References

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