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w3m Certificate Handling Format String Vulnerability
Secunia Advisory: SA23492
Release Date: 2006-12-26
Last Update: 2007-06-11
Popularity: 7,491 views

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:w3m 0.x

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CVE reference:CVE-2006-6772
CVE-2007-3125


Description:
A vulnerability has been reported in w3m, which potentially can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a format string error when handling SSL certificates and can be exploited via a specially crafted SSL certificate containing format specifiers in the "CN" field.

Successful exploitation may allow execution of arbitrary code when e.g. visiting a malicious website, but requires that the application is running with either the "-dump" or "-backend" option.

The vulnerability is reported in version 0.5.1. Other versions may also be affected.

Solution:
Update to version 0.5.2.

Provided and/or discovered by:
Reported by an anonymous person.

Changelog:
2007-01-02: Added CVE reference.
2007-06-05: Updated "Solution" section. Added link to "Original Advisory" section.
2007-06-11: Added CVE reference.

Original Advisory:
http://w3m.cvs.sourceforge.net/*checkout*/w3m/w3m/NEWS?revision=1.79
http://sourceforge.net/tracker/index....92&group_id=39518&atid=425439


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