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Access denied. You need a valid token. The page source contained another comment:
<!-- token is stored in the image EXIF --> All thumbnails were JPEG files served from /static/img/<hash>.jpg . Downloading a few of them with wget and inspecting the EXIF data ( exiftool ) revealed a custom tag:
# 1️⃣ Grab a random thumbnail to extract the token thumb=$(curl -s "$BASE/" | grep -oP '(?<=src=")/static/img/[^"]+\.jpg' | head -n1)
BASE="https://booru.allthefallen.more"
[+] Token extracted: boru_block_survive [+] Flag: flagb0oru_4ll_th3_f4ll3n_m0r3 | Technique | Why it mattered | |-----------|-----------------| | Directory brute‑forcing (ffuf/DirBuster) | Discovered the hidden /more endpoint. | | EXIF inspection ( exiftool ) | Revealed the token hidden in normal image metadata. | | Base64 decoding | Turned the encoded token into a usable string. | | Parameter/ cookie token authentication | Showed that the service used a simple secret‑in‑URL scheme. | | Steganography awareness | Though the flag was not hidden in pixel data, checking with zsteg is a good habit for “booru”‑style challenges. |
Access denied. You need a valid token. The page source contained another comment:
<!-- token is stored in the image EXIF --> All thumbnails were JPEG files served from /static/img/<hash>.jpg . Downloading a few of them with wget and inspecting the EXIF data ( exiftool ) revealed a custom tag: booru.allthefallen.more
# 1️⃣ Grab a random thumbnail to extract the token thumb=$(curl -s "$BASE/" | grep -oP '(?<=src=")/static/img/[^"]+\.jpg' | head -n1) Access denied
BASE="https://booru.allthefallen.more"
[+] Token extracted: boru_block_survive [+] Flag: flagb0oru_4ll_th3_f4ll3n_m0r3 | Technique | Why it mattered | |-----------|-----------------| | Directory brute‑forcing (ffuf/DirBuster) | Discovered the hidden /more endpoint. | | EXIF inspection ( exiftool ) | Revealed the token hidden in normal image metadata. | | Base64 decoding | Turned the encoded token into a usable string. | | Parameter/ cookie token authentication | Showed that the service used a simple secret‑in‑URL scheme. | | Steganography awareness | Though the flag was not hidden in pixel data, checking with zsteg is a good habit for “booru”‑style challenges. | Downloading a few of them with wget and