PT-2025-33090 · Unknown+1 · Comsndftp Ftp Server+1

Published 2025-08-13 · Updated 2025-08-14 · CVE-2012-10055

Positive Technologies (AI Summary)

CVSS v4.0

9.3

Critical

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions: ComSndFTP FTP Server version 1.3.7 Beta

Description: ComSndFTP FTP Server version 1.3.7 Beta contains a format string vulnerability in its handling of the USER command. Sending a specially crafted username with format specifiers allows a remote attacker to overwrite a hardcoded function pointer in memory (specifically WSACleanup from Ws2 32.dll). This enables the attacker to redirect execution flow and bypass Data Execution Prevention (DEP) protections using a Return-Oriented Programming (ROP) chain, ultimately leading to arbitrary code execution. The vulnerability is exploitable without authentication and affects default configurations.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use of Externally-Controlled Format String

Weakness Enumeration

CWE-134

Related Identifiers

CVE-2012-10055

Affected Products

Comsndftp Ftp Server

Ws2 32.Dll

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2012-10055 · Security Note
• https://exploit-db.com/exploits/19177 · Note
• https://exploit-db.com/exploits/19024 · Note
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/comsnd_ftpd_fmtstr.rb · Note
• https://vulncheck.com/advisories/comsndftp-user-format-string-rce · Note
• https://web.archive.org/web/20120317214524/http://ftp.comsnd.com · Note
• https://t.me/CVEtracker/29937 · Telegram Post
• https://t.me/cveNotify/132255 · Telegram Post