TITLE: Twin FTP Server Directory Traversal Vulnerability
SECUNIA ADVISORY ID: SA12511
VERIFY ADVISORY: http://secunia.com/advisories/12511/
CRITICAL: Highly critical
IMPACT: Manipulation of data, Exposure of system information, Exposure of sensitive information
WHERE: >From remote
SOFTWARE: Twin FTP Server 1.x http://secunia.com/product/3889/
DESCRIPTION: Tan Chew Keong has reported a vulnerability in Twin FTP Server, which can be exploited by malicious users to access files in arbitrary locations on a vulnerable system.
The vulnerability is caused due to an input validation error within the processing of arguments passed via the "CWD", "STOR", and "RETR" FTP commands.
Successful exploitation allows reading and writing of files in arbitrary locations outside the FTP root.
The vulnerability has been reported in version 1.0.3 R2. Other versions may also be affected.
SOLUTION: Update to version 1.0.3 R3 released on 2004-09-10. The updated version released before did not address the vulnerability correctly.
PROVIDED AND/OR DISCOVERED BY: Tan Chew Keong
ORIGINAL ADVISORY: http://www.security.org.sg/vuln/twinftp103r2.html
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