CVE-2007-4322

BlockHosts before 2.0.4 does not properly parse (1) sshd and (2) vsftpd log files, which allows remote attackers to add arbitrary deny entries to the /etc/hosts.allow file and cause a denial of service by adding arbitrary IP addresses to a daemon log file, as demonstrated by connecting through ssh with a client protocol version identification containing an IP address string, or connecting through ftp with a username containing an IP address string, different vectors than CVE-2007-2765.

CVE ID:

CVE-2007-4322

Published:

2007-08-14

Modified:

2026-04-23

CVSS Score:

6.8

Severity:

MEDIUM

Vector:

AV:N/AC:M/Au:N/C:P/I:P/A:P