CVE-2003-0686: Buffer overflow in PAM SMB module (pam_smb) 1.1.6 and earlier, when authenticating to a remote service, all...

Security readout for executives and security teams

CVE-2003-0686 is a buffer overflow in the PAM SMB authentication module, pam_smb 1.1.6 and earlier. If a system uses this module to authenticate against a remote SMB service, a remote attacker could execute arbitrary code. The bundle does not provide CVSS, confirmed exploit activity, or a named fixed version. Exposure is most plausible on legacy Unix or Linux systems where pam_smb is installed and configured in PAM authentication flows. Systems without pam_smb, or not using it for remote SMB-backed authentication, are not indicated as exposed by the supplied bundle. Prioritize any remaining use of pam_smb because the impact is remote code execution in authentication infrastructure. This is an old issue, so urgency is highest for legacy systems, unmanaged servers, and appliances that may have missed 2003-era vendor updates. Mitigation focus: Inventory systems for pam_smb packages and PAM configuration references.; Remove pam_smb where SMB-backed PAM authentication is no longer required.; For required deployments, check vendor advisories for supported patched packages..

Prepared

Jun 30, 2026, 09:00 UTC (UTC+00:00)

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