Knife

Verified writeups for the Knife machine of Hack The Box

Knife

$ tldr PHP 8.1.0-dev User-Agent RCE → sudo knife binary

·	·
Operating system	Linux
Difficulty	Easy
Vector	Linux privesc
IP	10.10.10.242
Retirement date	2021-08-28
Skills	PHP 8.1.0-dev - ‘User-Agent’ Remote Code Execution [RCE] Abusing Sudoers Privilege (Knife Binary) [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
Remote Code Execution (RCE)	HackTricks	Open

Related skills worth mastering

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

If you liked this machine, try

• SwagShop — Linux, Easy
• Chaos — Linux, Medium
• Shibboleth — Linux, Medium
• Frolic — Linux, Easy
• Nibbles — Linux, Easy

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Last updated: 2026-06-07