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 crash Asterisk by deliberately misusing SIP 181 responses.
Does this matter?
Lower severity and a low EPSS score (4.05%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 4.05% probability · 91th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-120
- Affected
- digium/asterisk
- Source
- cve@mitre.org
EPSS 4.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://packetstormsecurity.com/files/161470/Asterisk-Project-Security-Advisory-AST-2021-001.htmlPatch, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Feb/57Mailing List, Third Party Advisory
- https://downloads.asterisk.org/pub/security/AST-2021-001.htmlVendor Advisory
- https://issues.asterisk.org/Issue Tracking, Vendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29227Exploit, Issue Tracking, Patch, Vendor Advisory
- http://packetstormsecurity.com/files/161470/Asterisk-Project-Security-Advisory-AST-2021-001.htmlPatch, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/Feb/57Mailing List, Third Party Advisory
- https://downloads.asterisk.org/pub/security/AST-2021-001.htmlVendor Advisory
- https://issues.asterisk.org/Issue Tracking, Vendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29227Exploit, Issue Tracking, Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.