Secunia Research: RhinoSoft Serv-U TEA Decoding Buffer Overflow

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                 Secunia Research 18/11/2009

     - RhinoSoft Serv-U TEA Decoding Buffer Overflow -

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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

• RhinoSoft Serv-U 9.0.0.5

NOTE: Other versions may also be affected.

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2) Severity

Rating: Highly critical
Impact: System compromise
Where: Remote

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3) Vendor's Description of Software

"Serv-U FTP Server is now offers an all-in-one file server solution
featuring a built in web transfer client, web based adminstration,
improved interface and more while still offering unparalleled security
and ease-of-use at the best price on the market.".

Product Link:
http://www.serv-u.com/

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4) Description of Vulnerability

Secunia Research has discovered a vulnerability in Serv-U, which can
be exploited by malicious people to potentially compromise a
vulnerable system.

The vulnerability is caused by a boundary error in a function when
processing a hexadecimal representation of a string using a TEA
decoding algorithm. This can be exploited to cause a stack-based
buffer overflow by passing an overly long string.

Successful exploitation may allow execution of arbitrary code.

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5) Solution

Update to version 9.1.0.0.

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6) Time Table

05/11/2009 - Vendor notified.
05/11/2009 - Vendor response.
17/11/2009 - Fixed version released by the vendor.
18/11/2009 - 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 currently
not assigned a CVE identifier 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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http://secunia.com/secunia_research/

Secunia regularly hires new skilled team members. Check the URL below
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http://secunia.com/corporate/jobs/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/advisories/mailing_lists/

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10) Verification

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2009-46/

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

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