Bug 1895395 (CVE-2020-28242) - CVE-2020-28242 asterisk: outbound INVITE loop on challenge with different nonce
Summary: CVE-2020-28242 asterisk: outbound INVITE loop on challenge with different nonce
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-28242
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1895396 1895397
Blocks: 1895428
TreeView+ depends on / blocked
 
Reported: 2020-11-06 14:55 UTC by Guilherme de Almeida Suckevicz
Modified: 2020-11-06 20:21 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2020-11-06 20:21:11 UTC
Embargoed:

Attachments (Terms of Use)

Description Guilherme de Almeida Suckevicz 2020-11-06 14:55:36 UTC 
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.

Reference:
http://downloads.asterisk.org/pub/security/AST-2020-002.html
Comment 1 Guilherme de Almeida Suckevicz 2020-11-06 14:55:55 UTC 
Created asterisk tracking bugs for this issue:

Affects: epel-all [bug 1895397]
Affects: fedora-all [bug 1895396]
Comment 2 Jared Smith 2020-11-06 20:05:18 UTC 
Updated packages already pushed to Rawhide.  I will update EPEL early next week.
Comment 3 Product Security DevOps Team 2020-11-06 20:21:11 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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