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
Alias: CVE-2020-28242
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
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:
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Last Closed: 2020-11-06 20:21:11 UTC

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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.


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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