National Cyber-Alert System

Vulnerability Summary for CVE-2006-6301

Overview

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.

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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External Source: XF

Name: denyhosts-log-files-dos(30761)

Hyperlink:http://xforce.iss.net/xforce/xfdb/30761

External Source: BID

Name: 21468

Hyperlink:http://www.securityfocus.com/bid/21468

External Source: VUPEN

Name: ADV-2006-4876

Type: Advisory

Hyperlink:http://www.frsirt.com/english/advisories/2006/4876

External Source: GENTOO

Name: GLSA-200701-01

Hyperlink:http://security.gentoo.org/glsa/glsa-200701-01.xml

External Source: SECUNIA

Name: 23603

Type: Advisory

Hyperlink:http://secunia.com/advisories/23603

External Source: SECUNIA

Name: 23236

Type: Advisory

Hyperlink:http://secunia.com/advisories/23236

External Source: CONFIRM

Name: http://bugs.gentoo.org/show_bug.cgi?id=157163

Hyperlink:http://bugs.gentoo.org/show_bug.cgi?id=157163