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Insecure Library Loading
Highly critical

Firefox IDN URL Domain Name Buffer Overflow

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Release Date:  2005-09-09    Last Update:  2005-09-23    Views:  77,370

Secunia Advisory SA16764

Where:

From remote

Impact:

DoS, System access

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Tom Ferris has discovered a vulnerability in Firefox, which can be exploited by malicious people to cause a DoS (Denial of Service) or to compromise a user's system.

The vulnerability is caused due to an error in the handling of an IDN URLs that contains the 0xAD character in its domain name. This can be exploited to cause a heap-based buffer overflow.

Successful exploitation crashes Firefox and allows code execution but requires that the user is tricked into visiting a malicious web site or open a specially crafted HTML file.

NOTE: Exploit code is publicly available.

The vulnerability has been confirmed in version 1.0.6, and is reported to affect versions prior to 1.0.6, and version 1.5 Beta 1.


Solution:
Update to version 1.0.7.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Tom Ferris

Original Advisory:
http://security-protocols.com/advisory/sp-x17-advisory.txt

Mozilla Foundation:
http://www.mozilla.org/security/announce/mfsa2005-57.html

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: Firefox IDN URL Domain Name Buffer Overflow

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