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                     Secunia Research 13/05/2010

     - aria2 metalink "name" Directory Traversal Vulnerability -

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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 

* aria2 1.9.1 build2

NOTE: Other versions may also be affected.

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2) Severity 

Rating: Moderately critical
Impact: System access
Where:  Remote

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3) Vendor's Description of Software 

"aria2 is a lightweight multi-protocol & multi-source, cross platform
download utility operated in command-line.".

Product Link:
http://aria2.sourceforge.net/

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in aria2, which can be
exploited by malicious people to compromise a user's system.

The vulnerability is caused due to the application not properly
sanitising the "name" attribute of the "file" element of metalink
files before using it to download files. If a user is tricked into
downloading from a specially crafted metalink file, this can be
exploited to download files to directories outside of the intended
download directory via directory traversal attacks.

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5) Solution 

Update to version 1.9.3.

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6) Time Table 

30/04/2010 - Vendor notified.
01/05/2010 - Vendor response.
13/05/2010 - Public disclosure.

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7) Credits 

Discovered by Stefan Cornelius, Secunia Research.

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8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2010-1512 for the vulnerability.

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9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://secunia.com/advisories/business_solutions/

Secunia also provides a publicly accessible and comprehensive advisory
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10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2010-71/

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

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