GLSA 200501-21: HylaFAX: hfaxd unauthorized login vulnerability

http://security.gentoo.org/

Severity:	normal
Title:	HylaFAX: hfaxd unauthorized login vulnerability
Date:	01/11/2005
Bugs:	#75941
ID:	200501-21

Synopsis

HylaFAX is subject to a vulnerability in its username matching code, potentially allowing remote users to bypass access control lists.

Background

HylaFAX is a software package for sending and receiving facsimile messages.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/hylafax	< 4.2.0-r2	>= 4.2.0-r2	All supported architectures

Description

The code used by hfaxd to match a given username and hostname with an entry in the hosts.hfaxd file is insufficiently protected against malicious entries.

Impact

If the HylaFAX installation uses a weak hosts.hfaxd file, a remote attacker could authenticate using a malicious username or hostname and bypass the intended access restrictions.

Workaround

As a workaround, administrators may consider adding passwords to all entries in the hosts.hfaxd file.

Resolution

All HylaFAX users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/hylafax-4.2.0-r2"

Note: Due to heightened security, weak entries in the hosts.hfaxd file may no longer work. Please see the HylaFAX documentation for details of accepted syntax in the hosts.hfaxd file.

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200501-21.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.