CVE-2007-5256

FSD 2.052 d9 and earlier - Remote Code Execution via Long HELP Command

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 3 public exploits for CVE-2007-5256. PoCs published by weak, Luigi Auriemma.

AI-analyzed exploit summary This exploit targets a buffer overflow vulnerability in FSFDT Windows FSD Beta (CVE-2007-5256) to execute a reverse shell. It uses a JMP ESP address from KERNEL32.DLL and encoded shellcode to spawn a connection to 10.0.0.100:4321.

Description

Multiple stack-based buffer overflows in FSD 2.052 d9 and earlier, and FSFDT FSD 3.000 d9 and earlier, allow (1) remote attackers to execute arbitrary code via a long HELP command on TCP port 3010 to the sysuser::exechelp function in sysuser.cc and (2) remote authenticated users to execute arbitrary code via long commands on TCP port 6809 to the servinterface::sendmulticast function in servinterface.cc, as demonstrated by a PIcallsign command.

Exploits (3)

exploitdb WORKING POC VERIFIED
by weak · perlremotewindows
https://www.exploit-db.com/exploits/4484

This exploit targets a buffer overflow vulnerability in FSFDT Windows FSD Beta (CVE-2007-5256) to execute a reverse shell. It uses a JMP ESP address from KERNEL32.DLL and encoded shellcode to spawn a connection to 10.0.0.100:4321.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: FSFDT Windows FSD Beta from FSD V3.000 draft 9
No auth needed
Prerequisites: Network access to the target · FSFDT service running on Windows 2000 SP4
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by Luigi Auriemma · perlremotewindows
https://www.exploit-db.com/exploits/30627

This exploit targets a buffer overflow vulnerability in FSD (Fraglab Server Daemon) by sending a crafted HELP command with a malicious payload. It includes a reverse shell payload encoded with Metasploit's PexFnstenvSub encoder, targeting Windows 2000 SP4.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: FSFDT (Fraglab Server Daemon) versions 2.052 d9 and 3.0000 d9
No auth needed
Prerequisites: Network access to the target FSD service · Target running a vulnerable version of FSD
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by Luigi Auriemma · textdoswindows
https://www.exploit-db.com/exploits/30628

This exploit demonstrates two buffer overflow vulnerabilities in FSD (Flight Simulator Daemon) versions 2.052 d9 and 3.0000 d9. The first involves sending an overly long 'HELP' command to port 3010/3011, while the second involves sending a malformed user authentication string to port 6809. Both can lead to remote code execution or denial-of-service.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: FSD (Flight Simulator Daemon) 2.052 d9, 3.0000 d9
No auth needed
Prerequisites: Network access to FSD ports (3010/3011 or 6809) · Ability to send raw TCP data (e.g., via netcat or telnet)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (9)

Core 9
Core References
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/27045
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/27008
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/481221/100/0/threaded
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/4484
Third Party Advisory third-party-advisory x_refsource_sreason
http://securityreason.com/securityalert/3195
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/25883
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2007/3334
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/481495/100/0/threaded

Scores

EPSS 0.0707
EPSS Percentile 93.4%

Details

CWE
CWE-119
Status published
Products (2)
mcdu/fsd 2.052_d9
mcdu/fsd 3.000_d9
Published Oct 06, 2007
Tracked Since Feb 18, 2026