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CVE-2020-35776
A buffer overflow in res_pjsip_diversion.c in Sangoma Asterisk versions 13.38.1, 16.15.1, 17.9.1, and 18.1.1 allows remote attacker to…
Medium6.5EPSS 4.1%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
A buffer overflow in res_pjsip_diversion.c in Sangoma Asterisk versions 13.38.1, 16.15.1, 17.9.1, and 18.1.1 allows remote attacker to crash Asterisk by deliberately misusing SIP 181 responses.
Timeline
ID reserved
By mitre
- 51 days later
· 51 days later
Published
- 3 years later
· 3 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 |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 4.1% · top 9.3% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
n/a
- affected n/a
References (5)
- https://issues.asterisk.org/ (opens in a new tab)x_refsource_MISCx_transferred
- 20210218 AST-2021-001: Remote crash in res_pjsip_diversion (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- https://downloads.asterisk.org/pub/security/AST-2021-001.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://issues.asterisk.org/jira/browse/ASTERISK-29227 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://packetstormsecurity.com/files/161470/Asterisk-Project-Security-Advisory-AST-2021-001.html (opens in a new tab)x_refsource_MISCx_transferred
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-2020-35776)Record last updated .