httpdx "f_command()" FTP Command Format String Vulnerability

Secunia ID	SA38486
Release Date	08 Feb 2010
Last Change	16 Feb 2010
Criticality	Highly Critical Typically used for remotely exploitable vulnerabilities that can lead to system compromise. Successful exploitation does not normally require any interaction but there are no known exploits available at the time of disclosure. Such vulnerabilities can exist in services like FTP, HTTP, and SMTP or in client systems like email programs or browsers.
Solution Status	Vendor Patch
Software	httpdx 1.x
Where	From remote "From remote" describes other vulnerabilities where the attack vector doesn't require access to the system or a local network. This category covers services that are acceptable to expose to the Internet (e.g. HTTP, HTTPS, SMTP). It also covers client applications used on the Internet and certain vulnerabilities where it is reasonable to assume that a security conscious user can be tricked into performing certain actions.
Impact	DoS (Denial of Service) This includes vulnerabilities ranging from excessive resource consumption (e.g. causing a system to use a lot of memory) to crashing an application or an entire system. System access This covers vulnerabilities where malicious people are able to gain system access and execute arbitrary code with the privileges of a local user.
Description	A vulnerability has been discovered in httpdx, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a vulnerable system. The vulnerability is caused due to a format string error within the "f_command()" function in httpdx_src/ftp.cpp, which can be exploited to cause a crash and potentially execute arbitrary code by sending a specially crafted FTP command containing format string specifiers to the server. The vulnerability is confirmed in version 1.5.2. Prior versions may also be affected.
Solution	Update to version 1.5.3.
Reported by	loneferret
Original Advisory	http://www.exploit-db.com/exploits/11343 http://httpdx.sourceforge.net/downloads/changelog.log