Format String Vulnerability in ComSndFTP FTP Server from ComSnd
CVE-2012-10055

9.3CRITICAL

Key Information:

Vendor

Comsndftp

Status
Ftp Server
Vendor
CVE Published:
13 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2012-10055?

The ComSndFTP FTP Server version 1.3.7 Beta is susceptible to a format string vulnerability due to improper handling of the USER command. This flaw allows an attacker to submit a maliciously crafted username containing format specifiers. Exploiting this vulnerability enables the attacker to overwrite a critical function pointer in memory, specifically targeting WSACleanup from Ws2_32.dll. This manipulation can redirect execution flow, successfully bypassing Data Execution Prevention (DEP) mechanisms with a Return-Oriented Programming (ROP) chain, which may ultimately lead to arbitrary code execution. The vulnerability can be triggered without requiring any form of authentication and affects users with default configurations.

Affected Version(s)

FTP Server 1.3.7 Beta

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2012-10055 - Proof of Concept

CVE-2012-10055 - Proof of Concept

CVE-2012-10055 - Proof of Concept

References

https://raw.githubusercontent.com/rapid7/metasploit-frame...
exploit
https://www.exploit-db.com/exploits/19024
exploit
https://www.exploit-db.com/exploits/19177
exploit

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ChaoYi Huang
.