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Weex "log_flush()" Format String Vulnerability
Secunia Advisory: SA17028
Release Date: 2005-10-03
Last Update: 2007-07-03
Popularity: 6,259 views

Critical:
Less critical
Impact: DoS
System access
Where: From local network
Solution Status: Unpatched

Software:Weex 2.x

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CVE reference:CVE-2005-3150


Description:
Ulf Harnhammar has reported a vulnerability in Weex, which potentially can be exploited by malicious users to cause a DoS (Denial of Service) or to compromise a vulnerable system.

The vulnerability is caused due to a format string error in the "log_flush()" function when flushing an error log entry that contains format string specifiers to disk. This may be exploited to execute arbitrary code on a user's system via a directory name containing format string specifiers.

Successful exploitation requires that the attacker is able to create directories within the user's Weex home directory.

The vulnerability has been reported in version 2.6.1.5. Other versions may also be affected.

Solution:
Restrict use to trusted servers only.

Provided and/or discovered by:
Ulf Harnhammar, Debian Security Audit Project

Changelog:
2005-10-10: Added CVE reference.
2007-07-02: Updated the credits.

Original Advisory:
http://www.freebsd.org/cgi/query-pr.cgi?pr=ports/86833
http://www.freebsd.org/cgi/query-pr.cgi?pr=ports/86825


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