Bug 2437723 (CVE-2026-23740)

Summary: CVE-2026-23740 Asterisk: Asterisk: Arbitrary code execution and file overwrite as root via insecure ast_coredumper file handling
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Asterisk. When the ast_coredumper writes its gdb init and output files to a world-writable directory, a local attacker with write permissions to that directory can exploit this vulnerability. By manipulating the gdb init file and output paths, the attacker can cause the system to execute arbitrary commands as root or overwrite arbitrary files, leading to privilege escalation and potential system compromise.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2437957, 2437962, 2437966, 2437967    
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Description OSIDB Bzimport 2026-02-09 11:02:15 UTC 
Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, when ast_coredumper writes its gdb init and output files to a directory that is world-writable (for example /tmp), an attacker with write permission(which is all users on a linux system) to that directory can cause root to execute arbitrary commands or overwrite arbitrary files by controlling the gdb init file and output paths. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.