CVE-2006-6301

DenyHosts 2.5 does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and cause a denial of service by adding arbitrary IP addresses to the sshd log file, as demonstrated by logging in via ssh with a login name containing certain strings with an IP address, which is not properly handled by a regular expression.

CVE ID:

CVE-2006-6301

Published:

2006-12-06

Modified:

2026-04-23

CVSS Score:

5.0

Severity:

MEDIUM

Vector:

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