Bug 2564825

Summary: CVE-2026-57201 asterisk: asterisk: Denial of Service via stack buffer overflow in H.323 trace logging [epel-8]
Product: [Fedora] Fedora EPEL Reporter: gkamathe
Component: asteriskAssignee: EPEL Packagers SIG <epel-packagers-sig>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: epel8CC: bennie.joubert, epel-packagers-sig, jsmith.fedora, lemenkov
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["494f62fb-e1a8-4d0a-b362-6956746389b0"]}
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Clone Of: Environment:
Last Closed: 2026-11-02 13:03:24 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2562208    

Description gkamathe 2026-11-02 09:53:34 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. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, a stack buffer overflow in the H.323 `ooTrace()` trace-logging function can occur when unbounded `vsprintf` writes into a fixed `2048-byte buffer`. A remote attacker may send a carefully crafted packet that causes the Asterisk process to crash. 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 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.
Comment 1 Peter Lemenkov 2026-11-02 13:03:24 UTC 
Not affected. The flaw is in the H.323 trace logging of the chan_ooh323 addon (addons/ooh323c/src/ootrace.c). The asterisk package on this branch is built without chan_ooh323 (it is disabled in menuselect), so the vulnerable code is not shipped in any asterisk-18.26.4 subpackage.