CVE-2021-43845 HIGH

CVE-2021-43845: Prevent out-of-bounds read in PJSIP

Vendor Pjsip
Product pjproject
Weakness CWE-125
Published December 27, 2021
Last update November 4, 2025
View on NVD All CVEs

CVSS base score

8.2/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 27, 2021 CVE published
November 4, 2025 Record updated