CVE-2021-43300
CRITICALCVSS 9.8/10EPSS 2.34%
Last modified
CVE-2021-43300 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Stack overflow in PJSUA API when calling pjsua_recorder_create. An attacker-controlled 'filename' 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_recorder_create. An attacker-controlled 'filename' argument may cause a buffer overflow since it is copied to a fixed-size stack buffer without any size validation.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Teluu | Pjsip | <= 2.11.1 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
| Debian | Debian Linux | 11.0 |
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://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://www.debian.org/security/2022/dsa-5285Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-43300?
Stack overflow in PJSUA API when calling pjsua_recorder_create. An attacker-controlled 'filename' argument may cause a buffer overflow since it is copied to a fixed-size stack buffer without any size validation.
How severe is CVE-2021-43300?
CVE-2021-43300 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-2021-43300?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-43295Zoho ManageEngine SupportCenter Plus before 11016 is vulnera…6.1
- CVE-2021-43296Zoho ManageEngine SupportCenter Plus before 11016 is vulnera…7.5
- CVE-2021-43297A deserialization vulnerability existed in dubbo hessian-lit…9.8
- CVE-2021-43298The code that performs password matching when using 'Basic' …9.8
- CVE-2021-43299Stack overflow in PJSUA API when calling pjsua_player_create…9.8
- CVE-2021-4330The Envato Elements & Download and Template Kit – Import plu…8.8
- CVE-2021-43301Stack overflow in PJSUA API when calling pjsua_playlist_crea…9.8
- CVE-2021-43302Read out-of-bounds in PJSUA API when calling pjsua_recorder_…9.1
- CVE-2021-43303Buffer overflow in PJSUA API when calling pjsua_call_dump. A…9.8
- CVE-2021-43304Heap buffer overflow in Clickhouse's LZ4 compression codec w…8.8
- CVE-2021-43305Heap buffer overflow in Clickhouse's LZ4 compression codec w…8.8
- CVE-2021-43306An exponential ReDoS (Regular Expression Denial of Service) …7.5
Are you affected by CVE-2021-43300?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST