BitZipper Buffer Overflow in Processing ACE Archives Lets Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1016512
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SecurityTracker URL: http://securitytracker.com/id?1016512
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CVE Reference: CVE-2005-2856
(Links to External Site)
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Date: Jul 18 2006
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Impact: Execution of arbitrary code via network, User access via network
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Advisory: Secunia Research
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Version(s): 4.1 SR-1
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Description: A vulnerability was reported in BitZipper. A remote user can cause arbitrary code to be executed on the target user's system.
A remote user can create an ACE archive with a specially crafted filename that, when extracted by the target user, will trigger a
buffer overflow in 'unacev2.dll' and execute arbitrary code on the target system. The code will run with the privileges of the
target user.
The vendor was notified on May 2, 2006.
Secunia Research discovered this vulnerability.
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Impact: A remote user can create an archive that, when extracted by the target user, will execute arbitrary code on the target user's system.
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Solution: No solution was available at the time of this entry.
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Vendor URL: www.bitzipper.com/ (Links to External Site)
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Cause: Boundary error
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Underlying OS: Windows (Any)
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Reported By: Secunia Research <remove-vuln@secunia.com>
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Message History:
None.
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Source Message Contents
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Date: Mon, 17 Jul 2006 09:08:32 +0200
From: Secunia Research <remove-vuln@secunia.com>
Subject: Secunia Research: BitZipper unacev2.dll Buffer Overflow
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======================================================================
Secunia Research 17/07/2006
- BitZipper unacev2.dll Buffer Overflow Vulnerability -
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Table of Contents
Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
References...........................................................7
About Secunia........................................................8
Verification.........................................................9
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1) Affected Software
* BitZipper version 4.1 SR-1.
Other versions may also be affected.
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2) Severity
Rating: Moderately Critical
Impact: System Access
Where: Remote
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3) Description of Vulnerability
Secunia Research has discovered a vulnerability in BitZipper, which
can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to a boundary error in UNACEV2.DLL
when extracting an ACE archive containing a file with an overly long
filename. This can be exploited to cause a stack-based buffer overflow
when a user extracts a specially crafted ACE archive.
The vulnerability is related to:
SA16479
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4) Solution
Do not extract untrusted archives.
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5) Time Table
02/05/2006 - Initial vendor notification.
16/05/2006 - Second vendor notification.
16/05/2006 - Initial vendor reply.
17/07/2006 - Public disclosure
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6) Credits
Discovered by Secunia Research.
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7) References
SA16479:
http://secunia.com/advisories/16479/
The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2005-2856 for the vulnerability.
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8) About Secunia
Secunia collects, validates, assesses, and writes advisories regarding
all the latest software vulnerabilities disclosed to the public. These
advisories are gathered in a publicly available database at the
Secunia website:
http://secunia.com/
Secunia offers services to our customers enabling them to receive all
relevant vulnerability information to their specific system
configuration.
Secunia offers a FREE mailing list called Secunia Security Advisories:
http://secunia.com/secunia_security_advisories/
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9) Verification
Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2006-46/advisory/
Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/
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