[NT] PowerArchiver DZIPS32.DLL Buffer Overflow
- From: SecuriTeam <support@xxxxxxxxxxxxxx>
- Date: 27 Jul 2006 14:08:29 +0200
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PowerArchiver DZIPS32.DLL Buffer Overflow
<http://www.powerarchiver.com/pacl/> PACL is "an advanced command line
archiving utility for Windows console environments. It fully supports a
variety of the most popular compressed file formats, including: ZIP, CAB,
JAR, TAR, TAR.GZ, TAR.BZ2, yENC, Base64, CAB SFX and many others. PACL
also includes 5 different encryption methods". A vulnerability has been
found in PowerArchiver. When exploited, the vulnerability allows execution
of arbitrary code when the user adds a file to a malicious ZIP archive.
* PowerArchiver version 9.62.03
* PowerArchiver version 9.63
This advisory discloses a buffer overflow vulnerability in PowerArchiver.
The stack-based buffer overflow occurs when PowerArchiver is attempting to
add a file to a ZIP archive that contains a file with an overly long
filename. It is possible to exploit the buffer overflow to execute
In order to exploit this vulnerability successfully, the user must be
convinced to open a malicious ZIP archive and to add a file to the
The buffer overflow occurs in DZIPS32.DLL (version 18.104.22.168) that is
distributed with PowerArchiver.
The buffer overflow occurs in a function that resembles the following in
func_20009B20(arg_0, arg_4, arg_8)
char buffer[0x800]; // 2048 bytes
var1 = 0;
var2 = 0;
var3 = 0;
var9 = 0;
var11 = 0;
// Both cases will cause buffer overflow in "buffer"
// when filename of compressed file is > 2048 bytes
if(arg_8->someFlag == 0)
2006-07-08 - Vulnerability Discovered.
2006-07-17 - Initial Vendor Notification.
2006-07-25 - Vendor Released Fixed Version.
2006-07-25 - Public Release.
The information has been provided by <mailto:chewkeong@xxxxxxx> Tan Chew
The original article can be found at: <http://vuln.sg/powarc962-en.html>
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