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
asterisk Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	impish	Ignored (end of life)
	jammy	Needs triage
	kinetic	Ignored (end of life, was needs-triage)
	lunar	Ignored (end of life, was needs-triage)
	mantic	Needs triage
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	xenial	Needs triage
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)
	trusty	Ignored (end of standard support)
	upstream	Needs triage
	xenial	Ignored (end of standard support)

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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