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Best tool to look for Linux local privilege escalation vectors: LinPEAS
- Get OS information
- Check the PATH, any writable folder?
- Check env variables, any sensitive detail?
- Search for kernel exploits using scripts (DirtyCow?)
- Check if the sudo version is vulnerable
- Dmesg signature verification failed
- More system enum (date, system stats, cpu info, printers)
- Enumerate more defenses
- List mounted drives
- Any unmounted drive?
- Any creds in fstab?
- Check for useful software installed
- Check for vulnerable software installed
- Is any unknown software running?
- Is any software running with more privileges than it should have?
- Search for exploits of running processes (especially the version running).
- Can you modify the binary of any running process?
- Monitor processes and check if any interesting process is running frequently.
- Can you read some interesting process memory (where passwords could be saved)?
- Is the PATH being modified by some cron and you can write in it?
- Any wildcard in a cron job?
- Some modifiable script is being executed or is inside modifiable folder?
- Have you detected that some script could be or are being executed very frequently? (every 1, 2 or 5 minutes)
- Any writable .service file?
- Any writable binary executed by a service?
- Any writable folder in systemd PATH?
- Any writable timer?
- Any writable .socket file?
- Can you communicate with any socket?
- HTTP sockets with interesting info?
- Can you communicate with any D-Bus?
- Enumerate the network to know where you are
- Open ports you couldn't access before getting a shell inside the machine?
- Can you sniff traffic using
tcpdump?
- Generic users/groups enumeration
- Do you have a very big UID? Is the machine vulnerable?
- Can you escalate privileges thanks to a group you belong to?
- Clipboard data?
- Password Policy?
- Try to use every known password that you have discovered previously to login with each possible user. Try to login also without a password.
- If you have write privileges over some folder in PATH you may be able to escalate privileges
- Can you execute any command with sudo? Can you use it to READ, WRITE or EXECUTE anything as root? (GTFOBins)
- Is any exploitable SUID binary? (GTFOBins)
- Are sudo commands limited by path? can you bypass the restrictions?
- Sudo/SUID binary without path indicated?
- SUID binary specifying path? Bypass
- LD_PRELOAD vuln
- Lack of .so library in SUID binary from a writable folder?
- SUDO tokens available? Can you create a SUDO token?
- Can you read or modify sudoers files?
- Can you modify /etc/ld.so.conf.d/?
- OpenBSD DOAS command
- Has any binary any unexpected capability?
- Has any file any unexpected ACL?
- screen
- tmux
- Profile files - Read sensitive data? Write to privesc?
- passwd/shadow files - Read sensitive data? Write to privesc?
- Check commonly interesting folders for sensitive data
- Weird Location/Owned files, you may have access to or alter executable files
- Modified in last mins
- Sqlite DB files
- Hidden files
- Script/Binaries in PATH
- Web files (passwords?)
- Backups?
- Known files that contains passwords: Use Linpeas and LaZagne
- Generic search
- Modify python library to execute arbitrary commands?
- Can you modify log files? Logtotten exploit
- Can you modify /etc/sysconfig/network-scripts/? Centos/Redhat exploit
- Can you write in ini, int.d, systemd or rc.d files?
- Can you abuse NFS to escalate privileges?
- Do you need to escape from a restrictive shell?
Join HackenProof Discord server to communicate with experienced hackers and bug bounty hunters!
Hacking Insights
Engage with content that delves into the thrill and challenges of hacking
Real-Time Hack News
Keep up-to-date with fast-paced hacking world through real-time news and insights
Latest Announcements
Stay informed with the newest bug bounties launching and crucial platform updates
Join us on Discord and start collaborating with top hackers today!
{% hint style="success" %}
Learn & practice AWS Hacking:HackTricks Training AWS Red Team Expert (ARTE)
Learn & practice GCP Hacking: HackTricks Training GCP Red Team Expert (GRTE)
Support HackTricks
- Check the subscription plans!
- Join the 💬 Discord group or the telegram group or follow us on Twitter 🐦 @hacktricks_live.
- Share hacking tricks by submitting PRs to the HackTricks and HackTricks Cloud github repos.