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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.

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4D WebStar Symbolic Link Vulnerability

Vulnerability Assessment Summary Checks for 4D FTP Server Detailed Explanation for this Vulnerability Assessment The remote server is running 4D WebStar FTP Server. 4D WebStar is reportedly vulnerable to a local symbolic link vulnerability. This issue is due to a design error that causes the application to open files without properly verifying their existence or their absolute location. Successful exploitation of this issue will permit a possible hacker to write to arbitrary files writable by the affected application, facilitating privilege escalation. See also : http://www.atstake.com/research/advisories/2004/a071304-1.txt Solution : Upgrade to 4D WebStar 5.3.3 or later. Network Security Threat Level: Low Networks Security ID: 10714 Vulnerability Assessment Copyright: This script is Copyright (C) 2004 David Maciejak

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