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Insecure Library Loading
Moderately critical

libmspack MS-ZIP Infinite Loop Denial of Service

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Release Date:  2010-07-26    Last Update:  2010-08-12    Views:  2,265

Secunia Advisory SA40719

Where:

From remote

Impact:

DoS, System access

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


A vulnerability has been reported in libmspack, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error when copying data from an uncompressed block (block type 0) and can be exploited to trigger an infinite loop by tricking an application using the library into processing specially crafted MS-ZIP archives.

The vulnerability is reported in versions prior to 0.2.

Note: An issue within the Quantum archive decoder reported by Larry Frieson can cause the library to pass a negative integer to the application's "spack_system::write()" implementation, which may in turn handle this as unsigned integer, subsequently leading to e.g. crashes.


Solution:
Update to libmspack 0.2.

Provided and/or discovered by:
The vendor credits Jason He.

Original Advisory:
http://freshmeat.net/projects/libmspack/releases/319820

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: libmspack MS-ZIP Infinite Loop Denial of Service

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