==== Secunia Research 18/11/2009 - RhinoSoft Serv-U TEA Decoding Buffer Overflow - ==== 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 ====================================================================== 1) Affected Software * RhinoSoft Serv-U 9.0.0.5 NOTE: Other versions may also be affected. ====================================================================== 2) Severity Rating: Highly critical Impact: System compromise Where: Remote ====================================================================== 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/ ====================================================================== 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. ====================================================================== 5) Solution Update to version 9.1.0.0. ====================================================================== 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. ====================================================================== 7) Credits Discovered by Secunia Research. ====================================================================== 8) References The Common Vulnerabilities and Exposures (CVE) project has currently not assigned a CVE identifier for the vulnerability. ====================================================================== 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 database as a service to the security community and private individuals, who are interested in or concerned about IT-security. http://secunia.com/advisories/ Secunia believes that it is important to support the community and to do active vulnerability research in order to aid improving the security and reliability of software in general: http://secunia.com/secunia_research/ Secunia regularly hires new skilled team members. Check the URL below to see currently vacant positions: http://secunia.com/corporate/jobs/ Secunia offers a FREE mailing list called Secunia Security Advisories: http://secunia.com/advisories/mailing_lists/ ====================================================================== 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/ ======================================================================