[UNIX] HylaFAX Format String Vulnerabilities (faxrm, faxalter)

From: support@securiteam.com
Date: 10/07/01 

From: support@securiteam.com
To: list@securiteam.com
Subject: [UNIX] HylaFAX Format String Vulnerabilities (faxrm, faxalter)
Message-Id: <20011006220753.78EE1138C4@mail.der-keiler.de>
Date: Sun,  7 Oct 2001 00:07:53 +0200 (CEST)

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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  HylaFAX Format String Vulnerabilities (faxrm, faxalter)
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SUMMARY

 <http://www.vix.com/hylafax/> HylaFAX client-server protocol server
contains a security vulnerability that allows local attackers to exploit a
format string attack in the program, causing it to execute arbitrary code.

DETAILS

Example:
The faxrm and faxalter utilities contain format string vulnerabilities
that can be caused by issuing the following commands:

$ faxrm -h %x 1
$ faxalter -h %x -D 1

Since both faxrm and faxalter are installed with set user id (setuid)
'uucp' privileges on some operating systems (in particular, on FreeBSD as
part of the ports collection), elevated privileges can be gained.

ADDITIONAL INFORMATION

The information has been provided by <mailto:christer.oberg@gmx.net>
Christer Oberg.

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