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WebCalendar "includedir" Parameter Arbitrary Setting File Loading Advisory Available in Danish 

Secunia Advisory: SA20367  
Release Date: 2006-05-31
Last Update: 2006-06-28

Critical:
Moderately critical
Impact: Security Bypass
Exposure of sensitive information
Where: From remote
Solution Status: Vendor Patch

Software:WebCalendar 1.x

CVE reference:CVE-2006-2762 (Secunia mirror)

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Description:
socsam has discovered a vulnerability in WebCalendar, which can be exploited by malicious people to bypass certain security restrictions and disclose sensitive information.

Input passed to the "includedir" parameter isn't properly verified, before it is used in an "fopen()" call. This can be exploited to load an arbitrary setting file from an external web site.

This can further be exploited to disclose the content of arbitrary files by defining the "user_inc" variable in a malicious setting file.

Successful exploitation requires that "register_globals" is enabled.

The vulnerability has been confirmed in version 1.0.3. Other versions may also be affected.

Solution:
Update to version 1.0.4.
http://sourceforge.net/project/showfiles.php?group_id=3870

Provided and/or discovered by:
socsam

Changelog:
2006-06-07: Added CVE reference.
2006-06-28: Updated "Solution" section.



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

6 Related Secunia Security Advisories

1. WebCalendar "noSet" Variable Overwrite Vulnerability
2. WebCalendar "format" Cross-Site Scripting Vulnerability
3. WebCalendar User Account Enumeration Weakness
4. WebCalendar Two Vulnerabilities and a Weakness
5. WebCalendar SQL Injection and Local File Overwrite Vulnerabilities
6. WebCalendar "includedir" Arbitrary File Inclusion Vulnerability


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