Laboratory

Verified writeups for the Laboratory machine of Hack The Box

Laboratory

$ tldr GitLab arbitrary file read + deser RCE → gitlab-rails admin

·	·
Operating system	Linux
Difficulty	Easy
Vector	Web
IP	10.10.10.216
Retirement date	2021-04-17
Skills	SSL Certificate Enumeration Gitlab Enumeration Gitlab Exploitation - Arbitrary file read via the UploadsRewriter when moving an issue Gitlab Exploitation - Malicious Marshalled Payload in a session cookie + Deserialization Attack [RCE] Abusing gitlab-rails console - Granting administrator privileges to our user EXTRA - Playing with Vulhub Pre-Built Vulnerable Environments Based on Docker-Compose Information Leakage - SSH Access Abusing SUID Binary + PATH Hijacking [Privilege Escalation]

Writeups

Language	Author	Format	Link
🇪🇸 ES	S4vitar	Vídeo	Open
🇬🇧 EN	0xdf	Texto	Open
🇬🇧 EN	IppSec	Vídeo	Open

Skill resources

Curated documentation for each technique listed in the Skills column above. Sources: HackTricks, GTFOBins, PortSwigger, etc.

Skill	Source	Link
Information Leakage	HackTricks	Open
Insecure Deserialization	PortSwigger	Open
SUID binaries	GTFOBins	Open
Remote Code Execution (RCE)	HackTricks	Open

Related skills worth mastering

Sudo abuse · linPEAS · Local File Inclusion (LFI) · Remote File Inclusion (RFI) · Shellshock (CVE-2014-6271)

If you liked this machine, try

• Jewel — Linux, Medium
• Bank — Linux, Easy
• Frolic — Linux, Easy
• Celestial — Linux, Medium
• Feline — Linux, Hard

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Last updated: 2026-06-15