Bug 2564784

Summary: CVE-2026-57196 asterisk: asterisk: User impersonation via reflected cross-site scripting in phone provisioning error pages [epel-9]
Product: [Fedora] Fedora EPEL Reporter: gkamathe
Component: asteriskAssignee: Peter Lemenkov <lemenkov>
Status: ON_QA --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: epel9CC: bennie.joubert, epel-packagers-sig, jsmith.fedora, lemenkov
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["ef29aebe-41b1-4682-a85f-da9a0dc692d1"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 2561037    

Description gkamathe 2026-11-02 09:48:04 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, an unauthenticated attacker may use reflected cross-site scripting in `phone provisioning HTTP error pages` to retrieve an authorized user's `AMI session cookie` and impersonate that user when `res_phoneprov` is enabled. The Asterisk HTTP web server, Asterisk Manager Interface (AMI), and AMI access via HTTP must all be enabled; each is disabled by default. The attacker must be able to connect to the HTTP server, which binds only to `127.0.0.1` by default even when enabled, and must convince the authorized user to click a malicious link. 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 Fedora Update System 2026-11-02 14:52:34 UTC 
FEDORA-EPEL-2026-002595a22b (asterisk-18.26.4-2.el9) has been submitted as an update to Fedora EPEL 9.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-002595a22b
Comment 2 Fedora Update System 2026-11-03 03:12:54 UTC 
FEDORA-EPEL-2026-002595a22b has been pushed to the Fedora EPEL 9 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-002595a22b

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.