CVE-2020-28242
Published: 6 November 2020
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.
Priority
Status
Package | Release | Status |
---|---|---|
asterisk Launchpad, Ubuntu, Debian |
bionic |
Needed
|
focal |
Needed
|
|
groovy |
Ignored
(end of life)
|
|
trusty |
Does not exist
|
|
xenial |
Needed
|
|
hirsute |
Not vulnerable
(1:16.15.0~dfsg-1)
|
|
impish |
Not vulnerable
(1:16.15.0~dfsg-1)
|
|
jammy |
Not vulnerable
(1:16.15.0~dfsg-1)
|
|
kinetic |
Not vulnerable
(1:16.15.0~dfsg-1)
|
|
lunar |
Not vulnerable
(1:16.15.0~dfsg-1)
|
|
upstream |
Released
(1:16.15.0~dfsg-1)
|
|
mantic |
Not vulnerable
(1:16.15.0~dfsg-1)
|
|
Patches: upstream: http://downloads.asterisk.org/pub/security/AST-2020-002-13.diff upstream: http://downloads.asterisk.org/pub/security/AST-2020-002-16.diff |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |