CVE-2003-0786: The SSH1 PAM challenge response authentication in OpenSSH 3.7.1 and 3.7.1p1, when Privilege Separation is d...

Security readout for executives and security teams

CVE-2003-0786 is an old OpenSSH authentication flaw. In affected OpenSSH 3.7.1 and 3.7.1p1 deployments, a specific SSH1 PAM challenge-response path could fail to enforce authentication when Privilege Separation was disabled. Business risk is highest for legacy systems still exposing SSH1-era OpenSSH to networks. Exposure is likely limited to legacy OpenSSH 3.7.1 or 3.7.1p1 systems using SSH1 PAM challenge-response with Privilege Separation disabled. Modern supported OpenSSH deployments are unlikely to match those conditions, but old appliances, embedded systems, or unmanaged Unix hosts deserve inventory review. Prioritize this for legacy-risk reduction, not emergency response, unless matching OpenSSH 3.7.1 or 3.7.1p1 hosts are exposed. Any exposed match should be treated as a high-risk authentication bypass candidate and removed or upgraded quickly. Mitigation focus: Identify and retire OpenSSH 3.7.1 and 3.7.1p1 installations.; Review the OpenSSH advisory and 3.7.1p2 release guidance.; Enable Privilege Separation where supported by vendor guidance..

Prepared

Jun 30, 2026, 08:29 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.