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CVE-2021-43845

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CVE-2021-43845

Published: Dec 27, 2021

Modified: Nov 4, 2025

PUBLISHED

CVSS v3.1

8.2

HIGH

Description

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.

VendorProductVersions

pjsip

pjproject

affected
<= 2.11.1

Weaknesses (CWE)

CWE-125

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

Low

References

GLSA-202210-37
vendor-advisory
DSA-5285
vendor-advisory

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