Bug 1930888 (CVE-2021-26713)

Summary:	CVE-2021-26713 asterisk: stack-based buffer overflow due to a signedness comparison mismatch
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bennie.joubert, carnil, jsmith.fedora, rbryant, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-02-19 19:01:58 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1930889
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2021-02-19 17:25:14 UTC

Due to a signedness comparison mismatch, an authenticated WebRTC client could cause a stack overflow and Asterisk crash by sending multiple hold/unhold requests in quick succession.

Reference:
https://downloads.asterisk.org/pub/security/AST-2021-004.html

Comment 1 Guilherme de Almeida Suckevicz 2021-02-19 17:25:30 UTC

Created asterisk tracking bugs for this issue:

Affects: fedora-all [bug 1930889]

Comment 2 Product Security DevOps Team 2021-02-19 19:01:58 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.

Comment 3 Salvatore Bonaccorso 2021-02-21 19:55:00 UTC

Hi

The upstream advisory https://downloads.asterisk.org/pub/security/AST-2021-004.html mentions CVE-2021-26713 as the assigned CVE which is as well inline with https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26713 so I guess CVE-2021-26714 used here is a typo?

If so and this assumption is correct, can you adjust the Alias and the Subject for this bugzilla entry?

Thanks a lot in advance,
Salvatore

Comment 4 Guilherme de Almeida Suckevicz 2021-02-22 13:06:34 UTC

Hi Salvatore, I guess upstream updated the AST-2021-004 advisory with CVE-2021-26713.
Anyway, the bugzilla is updated now!

Thank you!

Comment 5 Salvatore Bonaccorso 2021-02-22 14:38:09 UTC

(In reply to Guilherme de Almeida Suckevicz from comment #4)
> Hi Salvatore, I guess upstream updated the AST-2021-004 advisory with
> CVE-2021-26713.
> Anyway, the bugzilla is updated now!
> 
> Thank you!

Thank you!