Title: ACLogic CesarFTP Buffer Overflow Vulnerability
Severity: HIGH
Description:
CesarFTP is a freely available FTP server application built for the Microsoft Windows operating systems.
It is reported that CesarFTP is susceptible to a buffer overflow vulnerability. This vulnerability is due to a lack of proper bounds checking in the application. This leads to a buffer of fixed size being overrun, corrupting the contents of adjacent memory regions.
This vulnerability presents itself when an attacker sends extremely long commands to the FTP server. Specifically, it is reportedly sufficient to exploit this vulnerability by sending commands that contain approximately 5000 bytes to CesarFTP.
It is reported that this vulnerability is exploitable before authenticating to the FTP server, allowing anonymous attackers to either crash the FTP server, or possibly to execute arbitrary code in the context of the FTP server process.
Affected Products:
- ACLogic CesarFTP 0.98.0b
- ACLogic CesarFTP 0.99.0 g
- ACLogic CesarFTP 0.99.0e
References:
- ACLogic: CesarFTP Homepage
- CNHonker: Cesar FTP Server Long Command DoS Exploit
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