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[ GLSA 200501-21 ] HylaFAX: hfaxd unauthorized login vulnerability
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GLSA
Bodhisattva
Bodhisattva


Joined: 25 Feb 2003
Posts: 3827
Location: Essen, Germany

PostPosted: Tue Jan 11, 2005 5:48 pm    Post subject: [ GLSA 200501-21 ] HylaFAX: hfaxd unauthorized login vulnera Reply with quote

Gentoo Linux Security Advisory

Title: HylaFAX: hfaxd unauthorized login vulnerability (GLSA 200501-21)
Severity: normal
Exploitable: remote
Date: January 11, 2005
Bug(s): #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: net-misc/hylafax
Vulnerable: < 4.2.0-r2
Unaffected: >= 4.2.0-r2
Architectures: 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:
Code:
# 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

CAN-2004-1182
HylaFAX Announcement


Last edited by GLSA on Sun May 07, 2006 4:54 pm; edited 1 time in total
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