Vulnerability Description
A stack-based buffer overflow in res_rtp_asterisk.c in Sangoma Asterisk before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6 allows an authenticated WebRTC client to cause an Asterisk crash by sending multiple hold/unhold requests in quick succession. This is caused by a signedness comparison mismatch.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Digium | Asterisk | >= 16.0.0, < 16.16.1 |
| Digium | Certified Asterisk | 16.8 |
Related Weaknesses (CWE)
References
- https://downloads.asterisk.org/pub/security/Vendor Advisory
- https://downloads.asterisk.org/pub/security/AST-2021-004.htmlVendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29205Vendor Advisory
- https://downloads.asterisk.org/pub/security/Vendor Advisory
- https://downloads.asterisk.org/pub/security/AST-2021-004.htmlVendor Advisory
- https://issues.asterisk.org/jira/browse/ASTERISK-29205Vendor Advisory
FAQ
What is CVE-2021-26713?
CVE-2021-26713 is a vulnerability with a CVSS score of 6.5 (MEDIUM). A stack-based buffer overflow in res_rtp_asterisk.c in Sangoma Asterisk before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6 allows an authenticated WebR...
How severe is CVE-2021-26713?
CVE-2021-26713 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-2021-26713?
Check the references section above for vendor advisories and patch information. Affected products include: Digium Asterisk, Digium Certified Asterisk.