Beginners Guide to day/CVE AppSec Research

Application Security (AppSec) research is a critical skill for identifying vulnerabilities before they are exploited. This guide introduces beginners to 0day and CVE research, focusing on methodologies, tools, and best practices.

Read the full article here: https://lnkd.in/gYgRk7bi

You Should Know:

1. Essential Tools for AppSec Research

• Burp Suite: Intercept and analyze HTTP traffic.

  java -jar burpsuite_pro.jar
  

• OWASP ZAP: Automated scanner for web vulnerabilities.

  zap.sh
  

• Metasploit Framework: Exploit development and testing.

  msfconsole
  

2. Finding 0day Vulnerabilities

• Fuzzing with AFL (American Fuzzy Lop):

  afl-fuzz -i input_dir -o output_dir ./target_binary
  

• Static Analysis with `grep` for Common Vulnerabilities:

  grep -r "strcpy(" /path/to/code
  

3. CVE Research & Reporting

• Search for existing CVEs:

  curl -s "https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=Apache" | grep "CVE-"
  

• Submit new vulnerabilities to MITRE:

  // Example vulnerable code (Buffer Overflow)
  include <string.h>
  void vulnerable_function(char input) {
  char buffer[bash];
  strcpy(buffer, input); // Unsafe!
  }
  

4. Exploit Development (Linux)

• Compiling Exploits:

  gcc exploit.c -o exploit -m32 -fno-stack-protector -z execstack
  

• Checking Protections with checksec:

  checksec --file=/bin/ls
  

5. Windows AppSec Testing

• PowerShell for Recon:

  Get-Process | Where-Object { $_.CPU -gt 50 }
  

• Mimikatz for Credential Dumping:

  mimikatz.exe "sekurlsa::logonpasswords" "exit"
  

What Undercode Say:

AppSec research requires persistence, creativity, and deep technical knowledge. Beginners should focus on:
– Learning assembly and reverse engineering.
– Practicing on CTF platforms like Hack The Box.
– Contributing to open-source security projects.
– Following responsible disclosure practices.

Expected Output:

A structured approach to discovering and reporting vulnerabilities, with hands-on commands for Linux and Windows environments.

(Note: Other non-IT links were filtered out.)

References:

Reported By: Abhirup Konwar – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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