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Insecure Library Loading
Moderately critical

unace Directory Traversal and Buffer Overflow Vulnerabilities

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Release Date:  2005-02-23    Last Update:  2005-09-26    Views:  18,379

Secunia Advisory SA14359

Where:

From remote

Impact:

System access

Solution Status:

Unpatched

CVE Reference(s):

Description


Ulf Härnhammar has discovered some vulnerabilities in unace, which can be exploited by malicious people to compromise a user's system.

1) An input validation error when extracting files compressed with ACE (.ace) makes it possible extract files to arbitrary locations outside the specified directory using the "../" directory traversal sequence or an absolute path.

The vulnerability has been confirmed in version 1.2b. Other versions may also be affected.

2) Some boundary errors in the processing of malicious ACE archives can be exploited to cause a buffer overflow by tricking a user into extracting, testing, or listing a specially crafted archive.

The vulnerabilities have been confirmed in version 1.2b. One of the buffer overflow vulnerabilities have also been reported in version 2.04, 2.2 and 2.5. Other versions may also be affected.

Successful exploitation may allow execution of arbitrary code.


Solution:
Do not extract, list, or test untrusted ACE archives.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Ulf Härnhammar, Debian Security Audit Project.

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: unace Directory Traversal and Buffer Overflow Vulnerabilities

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