Title: 4D WebStar Symbolic Link Vulnerability
Severity: HIGH
Description:
4D WebStar is an application providing web, FTP and email services for Apple Mac OS X.
4D WebStar is reportedly vulnerable to a 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.
The problem presents itself when the affected application attempts to open up a file; it uses a relative path from the current working directory when opening files. This may be used to create arbitrary files on the system in directories writable by the affected process. Furthermore the default umask creates such files with world readable and writable attributes. This can be leveraged by creating file associated with the cron subsystem, facilitating privilege escalation.
Successful exploitation of this issue will allow an attacker to write to arbitrary files writable by the affected application, facilitating privilege escalation.
Affected Products:
- 4D WebSTAR 4.0.0
- 4D WebSTAR 5.2.0
- 4D WebSTAR 5.2.1
- 4D WebSTAR 5.2.2
- 4D WebSTAR 5.2.3
- 4D WebSTAR 5.2.4
- 4D WebSTAR 5.3.0
- 4D WebSTAR 5.3.1
- 4D WebSTAR 5.3.2
References:
- 4D Inc.: 4D Inc. Homepage
- 4D Inc.: 4D WebSTAR Product Page
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