Secunia Research: phpBugTracker "add_attachment()" Arbitrary File Upload

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                     Secunia Research 25/08/2010

     - phpBugTracker "add_attachment()" Arbitrary File Upload -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

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1) Affected Software 

* phpBugTracker 1.0.5

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Moderately critical
Impact: System access
Where:  From remote

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3) Vendor's Description of Software 

"phpBugTracker is a web-based bug tracker with functionality similar
to other issue tracking systems, such as Bugzilla. Design focuses on
separating the presentation, application, and database layers."

Product Link:
http://phpbt.sourceforge.net/

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4) Description of Vulnerability

Secunia Research has discovered a security issue in phpBugTracker,
which can be exploited by malicious users to compromise a vulnerable
system.

The security issue is caused due to the "add_attachment()" function
in attachment.php allowing the upload of files with arbitrary
extensions to a folder inside the web root. This can be exploited to 
execute arbitrary PHP code by uploading a PHP file.

Successful exploitation requires "Developer" permissions.

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5) Solution 

Restrict access to the "attachments/" directory (e.g. via .htaccess).

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6) Time Table 

10/08/2010 - Vendor notified.
18/08/2010 - Vendor notified (2nd attempt).
25/08/2010 - Public disclosure.

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7) Credits 

Discovered by Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has not yet
assigned a CVE identifier for the vulnerability.

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9) About Secunia

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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2010-107/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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