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wzdftpd Data Handling Denial of Service Vulnerability

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Release Date:  2007-01-22    Last Update:  2007-01-24    Views:  7,129

Secunia Advisory SA23852

Where:

From remote

Impact:

DoS

Solution Status:

Unpatched

Software:

CVE Reference(s):

Description


Jose Miguel Esparza has discovered a vulnerability in wzdftpd, which can be exploited by malicious users to cause a DoS (Denial of Service).

The vulnerability is caused due to a NULL pointer dereference error within "chtbl_lookup()" when processing data sent by the user. This can be exploited to crash the service by sending certain whitespace characters (e.g. " ", "\r", "\n", "\t").

The vulnerability is confirmed in version 0.8.0. Other versions may also be affected.


Solution:
Grant access to trusted users only.

Provided and/or discovered by:
Jose Miguel Esparza, S21Sec

Original Advisory:
http://www.s21sec.com/avisos/s21sec-033-en.txt

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: wzdftpd Data Handling Denial of Service Vulnerability

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