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Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200701-01] DenyHosts: Denial of Service

Vulnerability Assessment Details

[GLSA-200701-01] DenyHosts: Denial of Service

Vulnerability Assessment Summary
DenyHosts: Denial of Service

Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200701-01
(DenyHosts: Denial of Service)

Tavis Ormandy of the Gentoo Linux Security Audit Team discovered that
DenyHosts used an incomplete regular expression to parse failed login
attempts.

Impact

A remote unauthenticated attacker can add arbitrary hosts to the
blacklist by attempting to login with a specially crafted username. An
attacker may use this to prevent legitimate users from accessing a host
remotely.

Workaround

There is no known workaround at this time.

References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6301

Solution:
All DenyHosts users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-admin/denyhosts-2.6"

Network Security Threat Level: Medium

Networks Security ID:

Vulnerability Assessment Copyright: (C) 2007 Michel Arboi

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