Low
CVE-2024-21683
Low
(1 user assessed)
Very High
(1 user assessed)Unknown
Unknown
Unknown
Description
Rejected reason: This CVE’s publication may have been a false positive or a mistake. As a result, we have rejected this record.
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Technical Analysis
This vulnerability can be leveraged by an authenticated attacker to execute OS commands within the context of the Confluence application server. The authenticated user must have the “Confluence Administrator” global permission. By default, this permission is only granted to the confluence-administrators group.
To leverage this vulnerability, the user would login to Confluence, then:
- Navigate to General Configuration > Configure Code Macro
- Select “Add a new language”
- Provide a javascript file to execute, using
java.lang.ProcessBuilderto run an arbitrary command
- Specify an arbitrary language name
- Press the “Add” button
Once the “Add” button is pressed, there will likely be an error message displayed in the UI stating that the uploaded language file is invalid. Despite this error message, the Javascript code is executed. The language fails to be added so there is no language to clean up.
exploit.js
The following exploit.js source file will echo the current user information to /tmp/output.
new java.lang.ProcessBuilder["(java.lang.String[])"](["/usr/bin/sh", "-c", "echo $(id) > /tmp/output"]).start()
Original source from: https://github.com/W01fh4cker/CVE-2024-21683-RCE/blob/main/exploit.js
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Exploit
A PoC added here by the AKB Worker must have at least 2 GitHub stars.
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