CVE-2021-43301

Name: CVE-2021-43301
Creator: NVD / NIST
Published: 2022-02-16T21:15:07.813+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.34%

Last modified Jun 17, 2026

CVE-2021-43301 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Stack overflow in PJSUA API when calling pjsua_playlist_create. An attacker-controlled 'file_names' argument may cause a buffer overflow since it is copied to a fixed-size stack buffer without any size validation.. EPSS estimates a 2.34% chance of exploitation in the next 30 days.

Description

Stack overflow in PJSUA API when calling pjsua_playlist_create. An attacker-controlled 'file_names' argument may cause a buffer overflow since it is copied to a fixed-size stack buffer without any size validation.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.34%

81.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Teluu	Pjsip	<= 2.11.1
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

https://github.com/pjsip/pjproject/security/advisories/GHSA-qcvw-h34v-c7r9Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html
https://www.debian.org/security/2022/dsa-5285Third Party Advisory
https://github.com/pjsip/pjproject/security/advisories/GHSA-qcvw-h34v-c7r9Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html
https://lists.debian.org/debian-lts-announce/2024/09/msg00030.html
https://www.debian.org/security/2022/dsa-5285Third Party Advisory

Timeline

Published: Feb 16, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43301?

How severe is CVE-2021-43301?

CVE-2021-43301 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.34% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43301?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43301?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST