🔐 Security Engineer Bundle
The most comprehensive cybersecurity flashcard collection available. Covers offensive security, defense, cloud security, digital forensics, and incident response. Every card includes real tool commands, attack techniques, and defensive countermeasures. Built for aspiring pentesters, SOC analysts, security engineers, and anyone preparing for cybersecurity certifications.
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injection
What is SQL injection and how do you prevent it?
Untrusted data sent as part of a SQL query. The attacker can read, modify, or delete data. Always use parameterized queries — never string concatenation.
# VULNERABLE
query = f"SELECT * FROM users WHERE name = '{input}'"
# SAFE — parameterized
cursor.execute(
"SELECT * FROM users WHERE name = %s",
(user_input,)
)
recon
How do you perform network scanning with nmap?
nmap scans ports, detects services and OS. Start broad (ping sweep), then targeted (specific ports). Use scripts (-sC) for vulnerability detection. Always have authorization.
# Host discovery
nmap -sn 192.168.1.0/24
# Service + script scan
nmap -sV -sC -p 1-1000 target
# Full scan with OS detection
nmap -sV -sC -O -p- target -oA results
privesc
How do you find privilege escalation opportunities on Linux?
Check SUID binaries, sudo permissions, cron jobs, writable paths, and kernel version. Use automated tools like LinPEAS for comprehensive enumeration.
sudo -l # sudo rights
find / -perm -4000 2>/dev/null # SUID binaries
cat /etc/crontab # cron jobs
uname -a # kernel version
./linpeas.sh # automated scan
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