var-200911-0180
Vulnerability from variot

Stack-based buffer overflow in the TEA decoding algorithm in RhinoSoft Serv-U FTP server 7.0.0.1, 9.0.0.5, and other versions before 9.1.0.0 allows remote attackers to execute arbitrary code via a long hexadecimal string. RhinoSoft Serv-U FTP Server is prone to a remote stack-based buffer-overflow vulnerability because the application fails to perform adequate boundary checks on user-supplied data. Attackers can exploit this issue to execute arbitrary code within the context of the affected application. Failed exploit attempts will result in a denial-of-service condition. Serv-U 9.0.0.5 is vulnerable; other versions may also be affected. ----------------------------------------------------------------------

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TITLE: RhinoSoft Serv-U Cookie Buffer Overflow Vulnerability

SECUNIA ADVISORY ID: SA37228

VERIFY ADVISORY: http://secunia.com/advisories/37228/

DESCRIPTION: Nikolas Rangos has discovered a vulnerability in Serv-U, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the included HTTP server when processing certain cookies. This can be exploited to cause a stack-based buffer overflow by sending a malicious HTTP request containing a specially crafted cookie to the server.

The vulnerability is confirmed in version 9.0.0.5.

SOLUTION: Filter malicious requests using a proxy.

PROVIDED AND/OR DISCOVERED BY: Nikolaos Rangos, KC Security.

ORIGINAL ADVISORY: http://www.rangos.de/ServU-ADV.txt

About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities.

Subscribe: http://secunia.com/advisories/secunia_security_advisories/

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Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor.

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