Kotarak

Verified writeups for the Kotarak machine of Hack The Box

Kotarak

$ tldr SSRF → Tomcat WAR → wget CVE-2016-4971 → pivoting

CVE / Bulletins: CVE-2016-4971 ↗

·	·
Operating system	Linux
Difficulty	Hard
Vector	Active Directory
IP	10.10.10.55
Retirement date	2021-05-19
Skills	Server Side Request Forgery (SSRF) [Internal Port Discovery] Information Leakage [Backup] Tomcat Exploitation [Malicious WAR] Dumping hashes [NTDS] Wget 1.12 Vulnerability [CVE-2016-4971] [Privilege Escalation] (PIVOTING)

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
Port Forwarding / Pivoting	HackTricks	Open
Server-Side Request Forgery	HackTricks	Open

Related skills worth mastering

Cross-Site Scripting (XSS) · Remote Code Execution (RCE)

If you liked this machine, try

• Horizontall — Linux, Easy
• Shrek — Linux, Hard
• Acute — Windows, Hard
• TimeLapse — Windows, Easy
• Talkative — Linux, Hard

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Last updated: 2026-06-07