Bug 2532699 (CVE-2026-90779)

Summary: CVE-2026-90779 SIPp: SIPp: Denial of Service via oversized SIP authentication challenge parameters
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in SIPp. A malicious Session Initiation Protocol (SIP) server can exploit this by sending a specially crafted SIP authentication challenge with oversized algorithm parameters. This can lead to a stack buffer overflow in the `createAuthHeader()` function, causing the client process to crash and resulting in a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2532928    
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Description OSIDB Bzimport 2026-09-13 11:51:30 UTC
SIPp through 3.7.7 contains a stack buffer overflow vulnerability in createAuthHeader() when processing SIP authentication challenges with oversized algorithm parameters. A malicious SIP server can send a crafted 401 or 407 challenge to corrupt the stack and crash the client process.