Vulnerability · Published Nov 6, 2020 · Assigned by mitre
CVE-2020-28242
Medium 6.5
In plain English
A medium-severity security flaw in the asterisk package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 75% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | asterisk | 1:16.15.0~dfsg-1 | DEBIAN-CVE-2020-28242 |
Affected products (as reported)
References
- http://downloads.asterisk.org/pub/security/AST-2020-002.html x_refsource_MISC
- FEDORA-2020-6b277646c7 vendor-advisory, x_refsource_FEDORA
- [debian-lts-announce] 20220403 [SECURITY] [DLA 2969-1] asterisk security update mailing-list, x_refsource_MLIST