Two vulnerabilities have been reported in ProFTPD, which can be exploited by malicious users to manipulate certain data and malicious people to compromise a vulnerable system.
1) A logic error within the "pr_netio_telnet_gets()" function in src/netio.c when processing user input containing the Telnet IAC (Interpret As Command) escape sequence can be exploited to cause a stack-based buffer overflow by sending specially crafted input to the FTP or FTPS service.
Successful exploitation may allow execution of arbitrary code.
2) An input validation error within the "mod_site_misc" module can be exploited to e.g. create and delete directories, create symlinks, and change the time of files located outside a writable directory.
Successful exploitation requires that ProFTPD is compiled with the "mod_site_misc" module and the attacker has write access to a directory.
Solution: Update to version 1.3.3c.
Provided and/or discovered by: 1) An anonymous person via ZDI.
2) The vendor credits an anonymous person via SecuriTeam Secure Disclosure program.
Original Advisory: ProFTPD.org:
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Subject: ProFTPD Directory Traversal and Buffer Overflow Vulnerabilities
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