[ GLSA 201406-23 ] DenyHosts: Denial of Service

[GLSA]

Gentoo Linux Security Advisory

Title: DenyHosts: Denial of Service (GLSA 201406-23)
Severity: normal
Exploitable: remote
Date: June 25, 2014
Bug(s): #495130
ID: 201406-23

Synopsis

A vulnerability in DenyHosts could allow a remote attacker to
create a Denial of Service condition.


Background

DenyHosts is a script intended to be run by Linux system administrators
to help thwart SSH server attacks.


Affected Packages

Package: app-admin/denyhosts
Vulnerable: < 2.6-r9
Unaffected: >= 2.6-r9
Architectures: All supported architectures


Description

DenyHosts does not properly define the regular expressions used when
parsing SSH authentication logs.


Impact

A remote attacker could possibly cause a Denial of Service condition via
a crafted login name.


Workaround

There is no known workaround at this time.

Resolution

All DenyHost users should upgrade to the latest version: