CVE-2007-3377: Header.pm in Net::DNS before 0.60, a Perl module, (1) generates predictable sequence IDs with a fixed incre...

Security readout for executives and security teams

CVE-2007-3377 affects the Perl Net::DNS module before 0.60. It could generate predictable DNS query IDs, including repeated starting IDs across forked child processes. That makes DNS response spoofing easier against software relying on the module, originally noted for qpsmtp and SpamAssassin. The business concern is misdirected lookups, not direct server takeover. Exposure is most likely on legacy Perl systems or distribution packages using Net::DNS before 0.60, especially mail or filtering services that perform DNS lookups through qpsmtp, SpamAssassin, or similar Perl components. Treat this as a legacy dependency cleanup item with moderate integrity risk. Prioritize internet-facing or mail-processing systems that still run old Perl stacks or unsupported operating systems. Mitigation focus: Inventory systems and applications using Perl Net::DNS.; Upgrade Net::DNS to version 0.60 or later where applicable.; Apply relevant vendor security updates from Red Hat, Debian, Ubuntu, SUSE, or other distributions..

Prepared

Jun 29, 2026, 05:01 UTC (UTC+00:00)

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