Secunia CSI7
Advisories
Research
Forums
Create Profile
Our Commitment
Database
Search
Advisories by Product
Advisories by Vendor
Terminology
Report Vulnerability
Insecure Library Loading
Less critical

UnZip Directory Traversal Vulnerability

-

Release Date:  2003-05-14    Last Update:  2005-09-05    Views:  13,884

Secunia Advisory SA8781

Where:

From remote

Impact:

System access

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


A vulnerability has been discovered in UnZip, which potentially can be exploited by malicious people to compromise a user's system.

Last year a directory traversal vulnerability was discovered in UnZip. An updated version (5.50) was issued to address the vulnerability but apparently the vulnerability was not fixed properly in this version.

UnZip filters "../" in front of filenames in archives. However, a malicious person can still traverse directories on a system by including an encoded value between the two dots (eg. ". \003 ./[filename]"). UnZip will ignore the encoded value and then extract the file to "../[filename]".

This can be exploited to overwrite arbitrary files outside the directory, where the files are extracted to, if a user is tricked into extracting a malicious archive using UnZip.


Solution:
The vulnerability has been fixed in UnZip 5.51.

Provided and/or discovered by:
jelmer

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: UnZip Directory Traversal Vulnerability

No posts yet

-

You must be logged in to post a comment.



 Products Solutions Customers Partner Resources Company
 
 Corporate
Vulnerability Intelligence Manager (VIM)
Corporate Software Inspector (CSI)
Consumer
Personal Software Inspector (PSI)
Online Software Inspector (OSI)
 Industry
Compliance
Technology
Integration
 Customers
Testimonials
 VARS
MSSP
Technology Partners
References
 Factsheets
Reports
Webinars
Events
 About us
Careers
Memberships
Newsroom


 
© 2002-2014 Secunia ApS - Rued Langgaards Vej 8, 4th floor, DK-2300 Copenhagen, Denmark - +45 7020 5144
Terms & Conditions and Copyright - Privacy - Report Vulnerability