Vulnerability Description
An issue was discovered in Asterisk Open Source 13.x before 13.37.1, 16.x before 16.14.1, 17.x before 17.8.1, and 18.x before 18.0.1 and Certified Asterisk before 16.8-cert5. If Asterisk is challenged on an outbound INVITE and the nonce is changed in each response, Asterisk will continually send INVITEs in a loop. This causes Asterisk to consume more and more memory since the transaction will never terminate (even if the call is hung up), ultimately leading to a restart or shutdown of Asterisk. Outbound authentication must be configured on the endpoint for this to occur.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Asterisk | Certified Asterisk | <= 16.8.0 |
| Sangoma | Asterisk | >= 13.0, < 13.37.1 |
| Fedoraproject | Fedora | 33 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- http://downloads.asterisk.org/pub/security/AST-2020-002.htmlVendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/04/msg00001.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- http://downloads.asterisk.org/pub/security/AST-2020-002.htmlVendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/04/msg00001.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2020-28242?
CVE-2020-28242 is a vulnerability with a CVSS score of 6.5 (MEDIUM). An issue was discovered in Asterisk Open Source 13.x before 13.37.1, 16.x before 16.14.1, 17.x before 17.8.1, and 18.x before 18.0.1 and Certified Asterisk before 16.8-cert5. If Asterisk is challenged...
How severe is CVE-2020-28242?
CVE-2020-28242 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-2020-28242?
Check the references section above for vendor advisories and patch information. Affected products include: Asterisk Certified Asterisk, Sangoma Asterisk, Fedoraproject Fedora, Debian Debian Linux.