UltimateZIP Buffer Overflow in Extracting ACE Archives Lets Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1016066
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SecurityTracker URL: http://securitytracker.com/id?1016066
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CVE Reference: CVE-2005-2856
(Links to External Site)
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Date: May 11 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): 2.7.1, 3.0.3, 3.1b
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Description: A vulnerability was reported in UltimateZip. 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 file that has a specially crafted filename. When the archive is extracted, a buffer
overflow will occur in 'unacev2.dll' and arbitrary code will be executed on the target user's system. The code will run with the
privileges of the target user.
The vendor was notified on April 26, 2006 and later dates, without response.
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.ultimatezip.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: Thu, 11 May 2006 14:54:22 +0200
From: Secunia Research <remove-vuln@secunia.com>
Subject: Secunia Research: UltimateZip unacev2.dll Buffer Overflow
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======================================================================
Secunia Research 11/05/2006
- UltimateZip 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
* UltimateZip version 2.7.1, 3.0.3, and 3.1b.
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 UltimateZip, 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 ACE archives from untrusted sources.
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5) Time Table
26/04/2006 - Initial vendor notification.
27/04/2006 - Second vendor notification.
04/05/2006 - Third vendor notification.
11/05/2006 - Public disclosure. (No reply from vendor)
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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/2006-29/advisory/
Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/
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