CVE-2012-10055
ComSndFTP v1.3.7 Beta USER Format String RCE
- State
- Published
- Severity
- 9.3 Critical
- Published
- Aug 13, 2025
- Updated
- Jul 15, 2026
- Reserved
- Aug 11, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
Weaknesses
- CWE-134 Use of Externally-Controlled Format String
Affected Products
| Product | Versions |
|---|---|
FTP ServerComSndFTP |
|
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/comsnd_ftpd_fmtstr.rbexploit
- https://www.exploit-db.com/exploits/19024exploit
- https://www.exploit-db.com/exploits/19177exploit
- https://web.archive.org/web/20120317214524/http://ftp.comsnd.com/product
- https://www.vulncheck.com/advisories/comsndftp-user-format-string-rcethird-party-advisory
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