CVE-2011-10029

HIGH

Solar FTP Server < 2.1.1 - Denial of Service via USER Command Format String

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2011-10029. PoCs published by x000, including Metasploit module auxiliary/dos/windows/ftp/solarftp_user.

AI-analyzed exploit summary This Perl script exploits a Denial of Service (DoS) vulnerability in Solar FTP Server 2.1 by sending a malformed USER command with a buffer overflow payload. The exploit checks for the presence of the vulnerable server before sending the payload.

Description

Solar FTP Server fails to properly handle format strings passed to the USER command. When a specially crafted string containing format specifiers is sent, the server crashes due to a read access violation in the __output_1() function of sfsservice.exe. This results in a denial of service (DoS) condition.

Exploits (2)

exploitdb WORKING POC VERIFIED
by x000 · perldoswindows
https://www.exploit-db.com/exploits/16204

This Perl script exploits a Denial of Service (DoS) vulnerability in Solar FTP Server 2.1 by sending a malformed USER command with a buffer overflow payload. The exploit checks for the presence of the vulnerable server before sending the payload.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Solar FTP Server 2.1
No auth needed
Prerequisites: Network access to the target FTP server · Solar FTP Server 2.1 running on the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →
metasploit WORKING POC
rubypoc
https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/dos/windows/ftp/solarftp_user.rb

This Metasploit module exploits a format string vulnerability in Solar FTP Server by sending a malformed USER command, causing a denial of service (DoS) via a READ violation in the '__output_1()' function.

Classification
Working Poc 100%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Solar FTP Server versions 2.1.1 and earlier
No auth needed
Prerequisites: Network access to the target FTP server on port 21
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Scores

CVSS v4 8.7
EPSS 0.4884
EPSS Percentile 97.8%
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-134
Status published
Products (1)
Flexbyte Software/Solar FTP Server < 2.1.1
Published Aug 20, 2025
Tracked Since Feb 18, 2026