CVE-2015-3406: The PGP signature parsing in Module::Signature before 0.74 allows remote attackers to cause the unsigned po...

Security readout for executives and security teams

CVE-2015-3406 affects Perl Module::Signature before 0.74. Its PGP signature parsing could let unsigned content in a SIGNATURE file be treated as signed. The business concern is trust in package verification, not direct server takeover based on the supplied evidence. Exposure is most likely where Perl distributions or build pipelines rely on Module::Signature before 0.74 to validate SIGNATURE files. Ubuntu issued an advisory, so packaged deployments should also be checked through OS security channels. Treat as a targeted dependency-trust issue. Prioritize systems that ingest, build, or validate Perl packages, especially release automation and shared build infrastructure. Broader urgency is reduced by absent exploitation evidence and incomplete severity data. Mitigation focus: Upgrade Module::Signature to version 0.74 or later.; Apply applicable Ubuntu security updates from USN-2607-1.; Check OS and language package inventories for vulnerable Module::Signature versions..

Prepared

Jun 6, 2026, 04:48 UTC (UTC+00:00)

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