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https://github.com/carlospolop/hacktricks
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199 lines
12 KiB
Markdown
199 lines
12 KiB
Markdown
# Checklist - Linux Privilege Escalation
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<details>
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<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></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/hacktricks\_live)**.**
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* **Share your hacking tricks by submitting PRs to the** [**hacktricks repo**](https://github.com/carlospolop/hacktricks) **and** [**hacktricks-cloud repo**](https://github.com/carlospolop/hacktricks-cloud).
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</details>
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<figure><img src="../.gitbook/assets/image (7) (2).png" alt=""><figcaption></figcaption></figure>
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<figure><img src="../.gitbook/assets/image (1) (3) (1).png" alt=""><figcaption></figcaption></figure>
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**HackenProof is home to all crypto bug bounties.**
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**Get rewarded without delays**\
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HackenProof bounties launch only when their customers deposit the reward budget. You'll get the reward after the bug is verified.
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**Get experience in web3 pentesting**\
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Blockchain protocols and smart contracts are the new Internet! Master web3 security at its rising days.
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**Become the web3 hacker legend**\
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Gain reputation points with each verified bug and conquer the top of the weekly leaderboard.
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[**Sign up on HackenProof**](https://hackenproof.com/register) start earning from your hacks!
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{% embed url="https://hackenproof.com/register" %}
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### **Best tool to look for Linux local privilege escalation vectors:** [**LinPEAS**](https://github.com/carlospolop/privilege-escalation-awesome-scripts-suite/tree/master/linPEAS)
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### [System Information](privilege-escalation/#system-information)
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* [ ] Get **OS information**
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* [ ] Check the [**PATH**](privilege-escalation/#path), any **writable folder**?
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* [ ] Check [**env variables**](privilege-escalation/#env-info), any sensitive detail?
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* [ ] Search for [**kernel exploits**](privilege-escalation/#kernel-exploits) **using scripts** (DirtyCow?)
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* [ ] **Check** if the [**sudo version** is vulnerable](privilege-escalation/#sudo-version)
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* [ ] [**Dmesg** signature verification failed](privilege-escalation/#dmesg-signature-verification-failed)
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* [ ] More system enum ([date, system stats, cpu info, printers](privilege-escalation/#more-system-enumeration))
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* [ ] [Enumerate more defenses](privilege-escalation/#enumerate-possible-defenses)
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### [Drives](privilege-escalation/#drives)
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* [ ] **List mounted** drives
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* [ ] **Any unmounted drive?**
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* [ ] **Any creds in fstab?**
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### [**Installed Software**](privilege-escalation/#installed-software)
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* [ ] **Check for**[ **useful software**](privilege-escalation/#useful-software) **installed**
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* [ ] **Check for** [**vulnerable software**](privilege-escalation/#vulnerable-software-installed) **installed**
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### [Processes](privilege-escalation/#processes)
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* [ ] Is any **unknown software running**?
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* [ ] Is any software running with **more privileges than it should have**?
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* [ ] Search for **exploits of running processes** (especially the version running).
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* [ ] Can you **modify the binary** of any running process?
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* [ ] **Monitor processes** and check if any interesting process is running frequently.
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* [ ] Can you **read** some interesting **process memory** (where passwords could be saved)?
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### [Scheduled/Cron jobs?](privilege-escalation/#scheduled-jobs)
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* [ ] Is the [**PATH** ](privilege-escalation/#cron-path)being modified by some cron and you can **write** in it?
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* [ ] Any [**wildcard** ](privilege-escalation/#cron-using-a-script-with-a-wildcard-wildcard-injection)in a cron job?
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* [ ] Some [**modifiable script** ](privilege-escalation/#cron-script-overwriting-and-symlink)is being **executed** or is inside **modifiable folder**?
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* [ ] Have you detected that some **script** could be or are being [**executed** very **frequently**](privilege-escalation/#frequent-cron-jobs)? (every 1, 2 or 5 minutes)
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### [Services](privilege-escalation/#services)
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* [ ] Any **writable .service** file?
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* [ ] Any **writable binary** executed by a **service**?
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* [ ] Any **writable folder in systemd PATH**?
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### [Timers](privilege-escalation/#timers)
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* [ ] Any **writable timer**?
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### [Sockets](privilege-escalation/#sockets)
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* [ ] Any **writable .socket** file?
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* [ ] Can you **communicate with any socket**?
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* [ ] **HTTP sockets** with interesting info?
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### [D-Bus](privilege-escalation/#d-bus)
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* [ ] Can you **communicate with any D-Bus**?
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### [Network](privilege-escalation/#network)
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* [ ] Enumerate the network to know where you are
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* [ ] **Open ports you couldn't access before** getting a shell inside the machine?
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* [ ] Can you **sniff traffic** using `tcpdump`?
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### [Users](privilege-escalation/#users)
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* [ ] Generic users/groups **enumeration**
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* [ ] Do you have a **very big UID**? Is the **machine** **vulnerable**?
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* [ ] Can you [**escalate privileges thanks to a group**](privilege-escalation/interesting-groups-linux-pe/) you belong to?
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* [ ] **Clipboard** data?
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* [ ] Password Policy?
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* [ ] Try to **use** every **known password** that you have discovered previously to login **with each** possible **user**. Try to login also without a password.
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### [Writable PATH](privilege-escalation/#writable-path-abuses)
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* [ ] If you have **write privileges over some folder in PATH** you may be able to escalate privileges
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### [SUDO and SUID commands](privilege-escalation/#sudo-and-suid)
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* [ ] Can you execute **any command with sudo**? Can you use it to READ, WRITE or EXECUTE anything as root? ([**GTFOBins**](https://gtfobins.github.io))
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* [ ] Is any **exploitable SUID binary**? ([**GTFOBins**](https://gtfobins.github.io))
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* [ ] Are [**sudo** commands **limited** by **path**? can you **bypass** the restrictions](privilege-escalation/#sudo-execution-bypassing-paths)?
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* [ ] [**Sudo/SUID binary without path indicated**](privilege-escalation/#sudo-command-suid-binary-without-command-path)?
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* [ ] [**SUID binary specifying path**](privilege-escalation/#suid-binary-with-command-path)? Bypass
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* [ ] [**LD\_PRELOAD vuln**](privilege-escalation/#ld\_preload)
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* [ ] [**Lack of .so library in SUID binary**](privilege-escalation/#suid-binary-so-injection) from a writable folder?
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* [ ] [**SUDO tokens available**](privilege-escalation/#reusing-sudo-tokens)? [**Can you create a SUDO token**](privilege-escalation/#var-run-sudo-ts-less-than-username-greater-than)?
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* [ ] Can you [**read or modify sudoers files**](privilege-escalation/#etc-sudoers-etc-sudoers-d)?
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* [ ] Can you [**modify /etc/ld.so.conf.d/**](privilege-escalation/#etc-ld-so-conf-d)?
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* [ ] [**OpenBSD DOAS**](privilege-escalation/#doas) command
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### [Capabilities](privilege-escalation/#capabilities)
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* [ ] Has any binary any **unexpected capability**?
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### [ACLs](privilege-escalation/#acls)
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* [ ] Has any file any **unexpected ACL**?
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### [Open Shell sessions](privilege-escalation/#open-shell-sessions)
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* [ ] **screen**
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* [ ] **tmux**
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### [SSH](privilege-escalation/#ssh)
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* [ ] **Debian** [**OpenSSL Predictable PRNG - CVE-2008-0166**](privilege-escalation/#debian-openssl-predictable-prng-cve-2008-0166)
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* [ ] [**SSH Interesting configuration values**](privilege-escalation/#ssh-interesting-configuration-values)
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### [Interesting Files](privilege-escalation/#interesting-files)
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* [ ] **Profile files** - Read sensitive data? Write to privesc?
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* [ ] **passwd/shadow files** - Read sensitive data? Write to privesc?
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* [ ] **Check commonly interesting folders** for sensitive data
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* [ ] **Weird Location/Owned files,** you may have access to or alter executable files
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* [ ] **Modified** in last mins
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* [ ] **Sqlite DB files**
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* [ ] **Hidden files**
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* [ ] **Script/Binaries in PATH**
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* [ ] **Web files** (passwords?)
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* [ ] **Backups**?
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* [ ] **Known files that contains passwords**: Use **Linpeas** and **LaZagne**
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* [ ] **Generic search**
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### [**Writable Files**](privilege-escalation/#writable-files)
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* [ ] **Modify python library** to execute arbitrary commands?
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* [ ] Can you **modify log files**? **Logtotten** exploit
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* [ ] Can you **modify /etc/sysconfig/network-scripts/**? Centos/Redhat exploit
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* [ ] Can you [**write in ini, int.d, systemd or rc.d files**](privilege-escalation/#init-init-d-systemd-and-rc-d)?
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### [**Other tricks**](privilege-escalation/#other-tricks)
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* [ ] Can you [**abuse NFS to escalate privileges**](privilege-escalation/#nfs-privilege-escalation)?
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* [ ] Do you need to [**escape from a restrictive shell**](privilege-escalation/#escaping-from-restricted-shells)?
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<figure><img src="../.gitbook/assets/image (1) (3) (1).png" alt=""><figcaption></figcaption></figure>
|
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|
||
**HackenProof is home to all crypto bug bounties.**
|
||
|
||
**Get rewarded without delays**\
|
||
HackenProof bounties launch only when their customers deposit the reward budget. You'll get the reward after the bug is verified.
|
||
|
||
**Get experience in web3 pentesting**\
|
||
Blockchain protocols and smart contracts are the new Internet! Master web3 security at its rising days.
|
||
|
||
**Become the web3 hacker legend**\
|
||
Gain reputation points with each verified bug and conquer the top of the weekly leaderboard.
|
||
|
||
[**Sign up on HackenProof**](https://hackenproof.com/register) start earning from your hacks!
|
||
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||
{% embed url="https://hackenproof.com/register" %}
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<details>
|
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<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></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)!
|
||
* 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/hacktricks\_live)**.**
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* **Share your hacking tricks by submitting PRs to the** [**hacktricks repo**](https://github.com/carlospolop/hacktricks) **and** [**hacktricks-cloud repo**](https://github.com/carlospolop/hacktricks-cloud).
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</details>
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