CVE-2021-43845
Prevent out-of-bounds read in PJSIP
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Timeline
ID reserved
By GitHub_M
- 41 days later
· 41 days later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L |
| NVDNVD · Modified | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 3.9% · top 9.7% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.2.
Weakness
Affected products
References (9)
- https://github.com/pjsip/pjproject/security/advisories/GHSA-r374-qrwv-86hh (opens in a new tab)x_transferred
- https://github.com/pjsip/pjproject/pull/2924 (opens in a new tab)x_transferred
- https://github.com/pjsip/pjproject/commit/f74c1fc22b760d2a24369aa72c74c4a9ab985859 (opens in a new tab)x_transferred
- [debian-lts-announce] 20220328 [SECURITY] [DLA 2962-1] pjproject security update (opens in a new tab)mailing-listx_transferred
- GLSA-202210-37 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20221117 [SECURITY] [DLA 3194-1] asterisk security update (opens in a new tab)mailing-listx_transferred
- DSA-5285 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20230829 [SECURITY] [DLA 3549-1] ring security update (opens in a new tab)mailing-listx_transferred
- https://lists.debian.org/debian-lts-announce/2024/09/msg00030.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-43845)Record last updated .