CVE-2007-4322: BlockHosts before 2.0.4 does not properly parse (1) sshd and (2) vsftpd log files, which allows remote atta...

Security readout for executives and security teams

BlockHosts before 2.0.4 could be tricked into blocking arbitrary IP addresses because it trusted parsed sshd and vsftpd log content too broadly. The business impact is denial of service: legitimate users or systems may be locked out by poisoned log entries. Exposure is likely limited to legacy systems running BlockHosts before 2.0.4 with sshd or vsftpd log monitoring enabled. Internet-facing SSH or FTP services increase relevance. Systems not using BlockHosts are not indicated as affected by the provided sources. Treat as a targeted legacy exposure review, not an emergency unless critical systems still run affected BlockHosts. Prioritize internet-facing SSH or FTP servers where accidental or malicious lockout would disrupt operations. Mitigation focus: Upgrade BlockHosts to version 2.0.4 or later where feasible.; Review vendor changelog and guidance before applying production changes.; Remove or disable legacy BlockHosts deployments if no longer required..

Prepared

Jun 29, 2026, 04:07 UTC (UTC+00:00)

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