Grabit <= 1.7.2 beta 3 NZB file parsing stack overflow

2009.05.05

Credit: Niels Teusink

Risk: High

Local: Yes

Remote: No

CVE: CVE-2009-1586

CWE: CWE-119

CVSS Base Score: 9.3/10

Impact Subscore: 10/10

Exploitability Subscore: 8.6/10

Exploit range: Remote

Attack complexity: Medium

Authentication: No required

Confidentiality impact: Complete

Integrity impact: Complete

Availability impact: Complete

Grabit <= 1.7.2 beta 3 NZB file parsing stack overflow

Impact:        Remote code execution
Version:     <= 1.7.2 beta 3

Description

Grabit is a popular Windows usenet client designed for downloading 
binary files. It has support for NZB files, which a user would usually 
acquire from an external source. Version 1.7.2 beta 3 is vulnerable to a 
stack overflow when parsing DTD references in NZB files. Earlier 
versions are vulnerable as well. Reliable exploitation is pretty 
straightforward.

Fix

I reported this to the author a while ago. He has now released version 
1.7.2 beta  4, which fixes the bug. It can be downloaded at 
http://www.shemes.com/


Best regards,

Niels Teusink
http://blog.teusink.net/

See this note in RAW Version

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Grabit <= 1.7.2 beta 3 NZB file parsing stack overflow

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