Some vulnerabilities have been discovered in GuildFTPd, which can be exploited by malicious users to delete arbitrary files or compromise a vulnerable system.
1) A vulnerability is caused due to a boundary error when handling FTP "LIST" requests. This can be exploited to cause a heap-based buffer overflow via a combination of specially crafted "CWD" and "LIST" commands.
Successful exploitation allows execution of arbitrary code.
2) A vulnerability is caused due to an input validation error when handling FTP "DELE" requests. This can be exploited to escape the FTP root and delete arbitrary files on the system via directory traversal attacks using the "\.." character sequence.
The vulnerabilities are confirmed in version 0.999.14. Other versions may also be affected.
Solution: Restrict access to trusted users only.
Provided and/or discovered by: 1) dmnt
2) Jonathan Salwan
Original Advisory: 1) http://milw0rm.com/exploits/6738
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Subject: GuildFTPd Multiple Vulnerabilities
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