CVE-2021-43845

Prevent out-of-bounds read in PJSIP

Severity Score

9.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

PJSIP es una biblioteca de comunicación multimedia gratuita y de código abierto. En la versión 2.11.1 y anteriores, si el mensaje RTCP XR entrante contiene un bloque, el campo de datos no se comprueba con el tamaño del paquete recibido, resultando potencialmente en un acceso de lectura fuera de límites. Esto afecta a todos los usuarios que usan PJMEDIA y RTCP XR. Un actor malicioso puede enviar un mensaje RTCP XR con un tamaño de paquete no válido

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-16 CVE Reserved
2021-12-27 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-09-11 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-125: Out-of-bounds Read

CAPEC

References (8)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html	Mailing List
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html	Mailing List
https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html	Mailing List

URL	Date	SRC
https://github.com/pjsip/pjproject/pull/2924	2024-08-04

URL	Date	SRC
https://github.com/pjsip/pjproject/commit/f74c1fc22b760d2a24369aa72c74c4a9ab985859	2023-08-30
https://github.com/pjsip/pjproject/security/advisories/GHSA-r374-qrwv-86hh	2023-08-30

URL	Date	SRC
https://security.gentoo.org/glsa/202210-37	2023-08-30
https://www.debian.org/security/2022/dsa-5285	2023-08-30

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Teluu Search vendor "Teluu"		Pjsip Search vendor "Teluu" for product "Pjsip"				<= 2.11.1 Search vendor "Teluu" for product "Pjsip" and version " <= 2.11.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0"		-		Affected