CVE-2021-43845

Public Exploit
Prevent out-of-bounds read in PJSIP

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.

Category

8.2
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.12%
Vendor Advisory gentoo.org Vendor Advisory debian.org
Affected: pjsip pjproject
Published at:
Updated at:

References

Link Tags
https://github.com/pjsip/pjproject/security/advisories/GHSA-r374-qrwv-86hh third party advisory patch
https://github.com/pjsip/pjproject/pull/2924 issue tracking patch exploit third party advisory
https://github.com/pjsip/pjproject/commit/f74c1fc22b760d2a24369aa72c74c4a9ab985859 third party advisory patch
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html third party advisory mailing list
https://security.gentoo.org/glsa/202210-37 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html third party advisory mailing list
https://www.debian.org/security/2022/dsa-5285 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html mailing list

Frequently Asked Questions

What is the severity of CVE-2021-43845?
CVE-2021-43845 has been scored as a high severity vulnerability.
How to fix CVE-2021-43845?
To fix CVE-2021-43845, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-43845 being actively exploited in the wild?
It is possible that CVE-2021-43845 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-43845?
CVE-2021-43845 affects pjsip pjproject.
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