CAE-CD
Optional
OSH
CD-OSH Operating Systems Hardening
Systematic reduction of OS attack surface through configuration and policy.
EWU courses that cover this unit
CSCD 240 lectures and labs
Lectures
- CSCD240-S26-L05 Permissions part 1: ls -l anatomy, rwx, file types
- CSCD240-S26-L06 Permissions part 2: chmod octal + symbolic, directory x bit
Labs
- CSCD240-S26-LAB3 Linux Lab 3: Permissions and Man Pages
NCAE CyberGames error modes bound to this unit
- NCAE-eeb5e4e8f3 SMB Login / failure: SMB operation failed: [Errno 111] Connection refused
- NCAE-5e1da0ed9d SSH Login / failure: Failed to connect to host: IP
- NCAE-4b7774940b SMB Login / failure: SMB operation failed: [Errno 113] Host is unreachable
- NCAE-2ec02e1cd0 SMB Login / failure: SMB connection failed: protocol error
- NCAE-d9f492a0da SMB Login / failure: Failed to connect to host: IP
- NCAE-55a9a5a7d4 SMB Login / failure: SMB operation failed: timed out
- NCAE-720468fcb4 SMB Login / partial: SMB operation failed: Failed to list shares: Unable to locate Server Service RPC endpoint
- NCAE-49be0b578b SMB Login / failure: SMB operation timed out in 5 seconds
- NCAE-34e3807d5a SMB Login / partial: SMB operation failed: Failed to list shares: Unable to connect to IPC$
- NCAE-4b0a05cc84 SSH Login / partial: The following users failed to authenticate with their public key: nills, vetomo
- NCAE-9924ef98f9 SSH Login / partial: The following users failed to authenticate with their public key: vetomo, nills
- NCAE-f750673474 SSH Login / partial: The following users failed to authenticate with their public key: simone_weil, todd_k
- NCAE-cbaa327d45 SSH Login / partial: The following users failed to authenticate with their public key: vetomo, todd_k
- NCAE-31a06c29be SSH Login / partial: The following users failed to authenticate with their public key: claude_chevalley
- NCAE-57bc10ac12 SSH Login / partial: The following users failed to authenticate with their public key: claude_chevalley, simone_weil
- NCAE-8b86722a38 SSH Login / partial: The following users failed to authenticate with their public key: nills, simone_weil
- NCAE-7b7d319908 SSH Login / partial: The following users failed to authenticate with their public key: nills, todd_k
- NCAE-a4e6291912 SSH Login / partial: The following users failed to authenticate with their public key: simone_weil, vetomo, claude_chevalley
- NCAE-c5b357ae25 SSH Login / partial: The following users failed to authenticate with their public key: nills
- NCAE-5985c6e330 SSH Login / partial: The following users failed to authenticate with their public key: simone_weil, nills
- NCAE-ca679de119 SSH Login / partial: The following users failed to authenticate with their public key: vetomo, claude_chevalley
- NCAE-fd86ddff99 SSH Login / partial: The following users failed to authenticate with their public key: vetomo
- NCAE-d5ad63d4f1 SSH Login / partial: The following users failed to authenticate with their public key: simone_weil, vetomo, nills
- NCAE-b2369be32e SSH Login / partial: The following users failed to authenticate with their public key: todd_k
- NCAE-0f62f7018e SSH Login / partial: The following users failed to authenticate with their public key: claude_chevalley, todd_k, simone_weil
- NCAE-c9f04c8da7 SSH Login / partial: The following users failed to authenticate with their public key: nills, todd_k, claude_chevalley
- NCAE-3336e86af3 SSH Login / partial: The following users failed to authenticate with their public key: simone_weil, nills, claude_chevalley, todd_k
- NCAE-0c3df3519e SSH Login / partial: The following users failed to authenticate with their public key: simone_weil, todd_k, vetomo
- NCAE-3baf4b3c23 SSH Login / partial: The following users failed to authenticate with their public key: claude_chevalley, vetomo, nills
- NCAE-9272351c5c SSH Login / partial: The following users failed to authenticate with their public key: todd_k, nills, simone_weil
CTF challenges aligned to this unit
Three Circles of Trust
02 Permissions (10 pts)
Decode 644
02 Permissions (10 pts)
Decode 700
02 Permissions (10 pts)
Give Yourself Execute
02 Permissions (10 pts)
Tighten the Screws
02 Permissions (10 pts)
Apply to Everything
02 Permissions (10 pts)
Inspect the Container
02 Permissions (15 pts)
The Full Dossier
02 Permissions (15 pts)
Octal Arithmetic
02 Permissions (20 pts)
The Lazy Fix
02 Permissions (20 pts)
Decode 755
02 Permissions (25 pts)
Set It Exactly
02 Permissions (25 pts)
It's Not About the File
02 Permissions (30 pts)
Scalpel vs Sledgehammer
02 Permissions (50 pts)
Other units at this tier in CAE-CD
CD-AAL Advanced Algorithms
CD-ACR Advanced Cryptography
CD-ALG Algorithms
CD-ANT Advanced Network Technology and Protocols
CD-ATC Analog Telecommunications
CD-BCD Business Continuity and Disaster Recovery
CD-CCO Cloud Computing
CD-CCR Cyber Crime
CD-CPS Cyber-Physical Systems
CD-CSE Cybersecurity Ethics
CD-DAT Databases
CD-DBA Data Administration
CD-DCO Digital Communications
CD-DFS Digital Forensics
CD-DMS Database Management Systems
CD-DST Data Structures
CD-DVF Device Forensics
CD-EBS Embedded Systems
CD-FAC Forensic Accounting
CD-FMD Formal Methods
CD-FPM Fraud Prevention and Management
CD-HOF Host Forensics
CD-HRE Hardware Reverse Engineering
CD-IAA IA Architectures
CD-IAC IA Compliance
CD-IAS IA Standards
CD-ICS Industrial Control Systems
CD-IDR Independent/Directed Study/Research
CD-IDS Intrusion Detection/Prevention Systems
CD-ITC Introduction to Theory of Computation
CD-LCS Life-Cycle Security
CD-LLP Low Level Programming
CD-MEF Media Forensics
CD-MOT Mobile Technologies
CD-NSA Network Security Administration
CD-NTP Network Technology and Protocols
CD-NWF Network Forensics
CD-OSA Operating Systems Administration
CD-OST Operating Systems Theory
CD-PBE Pre-OS Boot Environment
CD-PRI Privacy
CD-PTT Penetration Testing
CD-QAT QA/Functional Testing
CD-RFP Radio Frequency Principles
CD-SAS Software Assurance
CD-SCA Systems Certification and Accreditation
CD-SCS Supply Chain Security
CD-SPG Systems Programming
CD-SPP Secure Programming Practices
CD-SRE Software Reverse Engineering
CD-SSA Software Security Analysis
CD-SSE Systems Security Engineering
CD-THI Threat Intelligence
CD-VLA Vulnerability Analysis
CD-VTT Virtualization Technologies
CD-WAS Web Application Security
CD-WSN Wireless Sensor Networks