Exploit › Module 9 › Lesson 4
Lab — Report
Assemble defender report from $PWN_LAB — finding, remediation proof, disclosure skeleton; no exploit attachments.
Visual · t24_report_lab
Lab: full report pack from $PWN_LAB toys. Original Cyberlium.
Opening
Ship a report a defender would act on — fix verified, disclosure ready, zero exploit bytes.
From Module 6–8 $PWN_LAB work: (1) finding writeup draft with observe repro; (2) remediation section with YOUR toy patched hash and retest; (3) responsible disclosure skeleton addressed to mentor; (4) integrity block — $PWN_LAB only, no weapon PoC; (5) optional CVE analogy paragraph from history lab; (6) chmod 600 report pack with index. Scan for ROP/shellcode/pwntools exploit files — must be zero. Gap paragraph for capstone checklist.
1. Pack contents
Finding draft, remediation evidence, disclosure skeleton, integrity block, index.md.
Cross-link crash lab GDB snapshot IDs.
Command guide
Try these commands — Pack contents
═══ TOOLS & WEBSITES ═══ Browse / read these (authorized learning only — stay in YOUR lab / program scope)
NVD — https://nvd.nist.gov/ (severity references in reports) GDB backtrace — https://sourceware.org/gdb/current/onlinedocs/gdb.html/Backtrace.html checksec — https://github.com/slimm609/checksec.sh
═══ INSTALL ═══
Linux (Debian/Ubuntu):
Command — copy this
sudo apt install openssl sudo apt install gdb
macOS:
Command — copy this
brew install gdb
Windows:
Command — copy this
choco install openssl
Use WSL gdb
═══ LINUX / macOS ═══
Command — copy this
export LAB_PWN=${LAB_PWN:-$HOME/cyberlium-lab/t24-pwn}observe crash; do NOT develop exploit — evidence for report only
Command — copy this
gdb -q -batch -ex 'run' -ex 'bt' -ex quit \ "$LAB_PWN/bin/build_vuln" <<< "$(printf '%80s' | tr ' ' 'A')" 2>&1 | tee "$LAB_PWN/notes/crash-bt.txt" | tail -12 openssl dgst -sha256 "$LAB_PWN/bin/build_vuln" "$LAB_PWN/bin/remediation_demo" | tee -a "$LAB_PWN/notes/report-evidence.txt" grep -E 'SIGSEGV|#0|sha256' "$LAB_PWN/notes/crash-bt.txt" "$LAB_PWN/notes/report-evidence.txt" | head -8 grep -E 'finding|remediation|disclosure' "$LAB_PWN/notes/"*.txt | head -10
Primary tools to practice this lesson: grep, openssl, gdb. Reference sites: NVD (https://nvd.nist.gov/); GDB backtrace (https://sourceware.org/gdb/current/onlinedocs/gdb.html/Backtrace.html); checksec (https://github.com/slimm609/checksec.sh). Run every command in the box — install first, then the usage lines — only on YOUR lab / program scope.
2. Quality bar
Every claim ties to observe evidence; remediation verified on $PWN_LAB.
Professional tone — no meme severity ratings.
3. Share-safe export
Redact before any public CTF blog; mentor copy hash-only default.
No live exploit attachments in zip.
4. What you ship: defender report lab pack
Finding + remediation proof + disclosure skeleton + integrity — chmod 600.
5. What you record before the next lesson
Defender report lab pack path.
6. Wrong vs right: weaponized exploits vs memory-safety literacy
Worked failure — same MSF word, opposite target. Right never needs a café Wi-Fi or classmate laptop.
Wrong
Report lab zip includes pwntools remote exploit.py.
Right
Defender report lab pack from $PWN_LAB. Next: quiz.
Mission: report lab
1) Complete finding draft. 2) Remediation with retest proof. 3) Disclosure skeleton to mentor. 4) Integrity block; chmod 600 index.
Stuck? Ask Cyberlium AI Mentor
Ask Mentor: “Minimum remediation proof?”
Knowledge Check
APPLY: Report lab includes:
Multiple choice
Knowledge Check
APPLY: True or False: Exploit PoC required in report lab.
True or False
Knowledge Check
APPLY: Report claims must:
Multiple choice