Vulnerability 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 Score
6.5
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Digium | Asterisk | >= 13.0.0, <= 13.38.1 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/161470/Asterisk-Project-Security-Advisory-APatchThird Party Advisory
- http://seclists.org/fulldisclosure/2021/Feb/57Mailing ListThird Party Advisory
- https://downloads.asterisk.org/pub/security/AST-2021-001.htmlVendor Advisory
- https://issues.asterisk.org/Issue TrackingVendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29227ExploitIssue TrackingPatch
- http://packetstormsecurity.com/files/161470/Asterisk-Project-Security-Advisory-APatchThird Party Advisory
- http://seclists.org/fulldisclosure/2021/Feb/57Mailing ListThird Party Advisory
- https://downloads.asterisk.org/pub/security/AST-2021-001.htmlVendor Advisory
- https://issues.asterisk.org/Issue TrackingVendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29227ExploitIssue TrackingPatch
FAQ
What is CVE-2020-35776?
CVE-2020-35776 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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.
How severe is CVE-2020-35776?
CVE-2020-35776 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-35776?
Check the references section above for vendor advisories and patch information. Affected products include: Digium Asterisk.