Asterisk Open Source 1.2.x before 1.2.35, 1.4.x before 1.4.26.3, 1.6.0.x before 1.6.0.17, and 1.6.1.x before 1.6.1.9; Business Edition A.x.x, B.x.x before B.2.5.12, C.2.x.x before C.2.4.5, and C.3.x.x before C.3.2.2; AsteriskNOW 1.5; and s800i 1.3.x before 1.3.0.5 generate different error messages depending on whether a SIP username is valid, which allows remote attackers to enumerate valid usernames via multiple crafted REGISTER messages with inconsistent usernames in the URI in the To header and the Digest in the Authorization header.
                
            Metrics
Affected Vendors & Products
References
        History
                    Wed, 28 May 2025 14:45:00 +0000
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Thu, 22 May 2025 04:30:00 +0000
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 MITRE
                        MITRE
                    Status: PUBLISHED
Assigner: redhat
Published: 2009-11-10T18:00:00
Updated: 2024-08-07T06:38:30.134Z
Reserved: 2009-10-16T00:00:00
Link: CVE-2009-3727
 Vulnrichment
                        Vulnrichment
                    No data.
 NVD
                        NVD
                    Status : Deferred
Published: 2009-11-10T18:30:00.250
Modified: 2025-04-09T00:30:58.490
Link: CVE-2009-3727
 Redhat
                        Redhat