Description
ComSndFTP FTP Server version 1.3.7 Beta contains a format string vulnerability in its handling of the USER command. By sending a specially crafted username containing format specifiers, a remote attacker can overwrite a hardcoded function pointer in memory (specifically WSACleanup from Ws2_32.dll). This allows the attacker to redirect execution flow and bypass DEP protections using a ROP chain, ultimately leading to arbitrary code execution. The vulnerability is exploitable without authentication and affects default configurations.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
ComSndFTP FTP Server
Default version status: unknown
1.3.7 Betaaffected
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/comsnd_ftpd_fmtstr.rb ↗
- https://www.exploit-db.com/exploits/19024 ↗
- https://www.exploit-db.com/exploits/19177 ↗
- https://web.archive.org/web/20120317214524/http://ftp.comsnd.com/ ↗
- https://www.vulncheck.com/advisories/comsndftp-user-format-string-rce ↗