Submit #572475: FreeFloat FTP Server 1.0 Buffer Overflow

This technique works well against Windows XP Professional Service Pack 2 and 3.
For this exploit, I tried several strategies to increase the reliability of the Poc - Proof Of Concept.
Sending an excessive amount of data through the "CD" command, the application crashes, indicating the Buffer Overflow condition.
Then, the offset amount was identified by using msf-pattern_create -l 1000
And then by using msf-pattern_offset -q to discover the offset amount.
After discovering the offset amount, it was necessary to adjust the data in the stack.
To advance in the exploit , mona was used, together with the command !mona jmp -r esp -n to discover a JMP ESP address, in this case it was 0x7c86467b.
Then I used the removal of the main badchars: 0x00\0x0a\0x0d I did not perform a search for badchars through bytearray, because I already knew the environment I was working in.
Finally, I added 20 nops and generated the shellcode with msfvenom
Successful exploitation of these issues could allow attackers to obtain a remote shell on the system.

• Source: ⚠️ https://fitoxs.com/exploit/exploit-4378c99fc0e41aa7fd3122bea6a2dbec7f95b6daec45d1f9478a6d540799529c.txt
• User: Fernando Mengali (UID 83791)
• Submission: 05/07/2025 02:35 (12 months ago)
• Moderation: 05/16/2025 17:02 (10 days later)
• Status: Accepted
• VulDB entry: 309313 [FreeFloat FTP Server 1.0 CD Command buffer overflow]
• Points: 20