Bug 2564877

Summary:	CVE-2026-57186 asterisk: asterisk: Denial of Service via malformed Q.931 elements in chan_ooh323 [epel-8]
Product:	[Fedora] Fedora EPEL	Reporter:	gkamathe
Component:	asterisk	Assignee:	EPEL Packagers SIG <epel-packagers-sig>
Status:	CLOSED NOTABUG	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	epel8	CC:	bennie.joubert, epel-packagers-sig, jsmith.fedora, lemenkov
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["f5a9bb80-e818-4273-97ca-745eabd3c17f"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-11-02 13:03:17 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:
Bug Blocks:	2562439

Description gkamathe 2026-11-02 09:59:59 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Asterisk is an open source private branch exchange and telephony toolkit. From 21.0.0-pre1 until Asterisk 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 22.8-cert3, the `chan_ooh323` `Q.931 party-number parser` lacks the `CVE-2022-37325` fix because that fix was never forward-ported from Asterisk 20 to later versions. Malformed Q.931 elements in an `OOH323 request` can therefore crash Asterisk. This issue affects Asterisk versions greater than 20. The `chan_ooh323` addon channel driver must be explicitly compiled and installed, which is not the default, and its port must be publicly reachable. This issue is fixed in Asterisk 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 22.8-cert3.

Comment 1 Peter Lemenkov 2026-11-02 13:03:17 UTC

Not affected. The flaw is in the chan_ooh323 addon channel driver (Q.931 party-number parser), and per the advisory only affects Asterisk versions after 20, where an earlier fix was missing. This branch ships asterisk 18.26.4, and in any case it is built without chan_ooh323 (it is disabled in menuselect), so the vulnerable code is not shipped.