Git on Willis Vandevanter

Pulling Specific Files from the Trickest Inventory (or any Github project)

Fri, 26 Aug 2022 00:00:00 +0000

The @trickest Inventory project is an interesting resource. It has a massive set of hostnames, live services, spidered URLs, and cloud data organized by Bug Bounty program. There is so much more data than I have interest in storing for my needs. In fact, the only thing I am interested in is the hostnames resource. Here is a quick and dirty way to pull the hostnames.txt file from every program without cloning the entire project.

💡 There is a good chance I am going to embarrass myself with this post and there is a better way. But this is part of learning and I embrace it. Please let me know and I will post the faster way at the top.

First, pull the current project git history without cloning it:

1
2
3
4


git clone --no-checkout \
--depth 1 \
--single-branch --branch=main \
https://github.com/trickest/inventory.git

Above we are cloning the project without checking out any files; --no-checkout. We are also only pulling HEAD (--depth 1) and only focused on the main branch.

Note, just the commit history from main takes up 336Mb 😲

Finally, we are going to download every hostname.txt file. This is done by finding the listing the HEAD tree, grep’ing for the filename, urlencoding & , and then downloading the file.

1
2
3
4


git ls-tree --full-name --name-only -r HEAD | \
grep hostnames.txt | \
sed -e "s/&/%26/" | \
xargs -I {} sh -c 'curl -o $(echo {} | cut -d\/ -f1)_hostnames.txt https://raw.githubusercontent.com/trickest/inventory/main/{}'

At this point you should have a directory full of the relevant files.

💡 If you are using this technique with another project take care that you trust the input (directories and filenames). You are piping them into a subshell.

If you don’t want to pipe into a subshell (yolo), you can use wget (remove the -o subshell) but you will be left with every file named hostnames.txt.X:

1
2
3
4


git ls-tree --full-name --name-only -r HEAD | \
grep hostnames.txt | \
sed -e "s/&/%26/" | \
xargs -I {} wget https://raw.githubusercontent.com/trickest/inventory/main/{}

Search all Github Repositories for an Organization

Fri, 09 Jan 2015 00:00:00 +0000

gumbler is a script I wrote to search through git commits and introduced in the blog post “Searching Through Git Commits”. Recently I wanted to run Gumbler across all repositories for an organization, the steps are discussed below.

First, we need to grab a list of repositories for the ORG. This can be done using the API

1
2
3


curl "https://api.github.com/orgs/[ORG NAME]/repos?page=1&per_page=10000" > repos.json
curl "https://api.github.com/orgs/[ORG NAME]/repos?page=2&per_page=10000" >> repos.json
...

Note, the API limits the number of values returned so you will want to update the page count to make sure you get them all.

Next we iterate through each repository, clone it, and run gumbler across the repo. A simple Ruby script is given below. Note, ignore any repos that were forked as they aren’t specific to the orgnization.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23


require 'json'

# specify repos.json as an argument
file = File.read(ARGV[0])

# parse the json
data_hash = JSON.parse(file)

# iterate each hash
data_hash.each do |hash|
 # ignore forked repos
 if !(hash["fork"])
 puts "|+| Testing #{hash["name"]}"
 
 # clone the project
 `git clone https://github.com/[ORG]/#{hash["name"]}.git`
 
 # Gumbler requires full directory paths
 `ruby ~/gumbler/gumbler.rb -s -p #{hash["name"]} ~/[ORG]/results/`

 sleep(3)
 end
end

Searching Through Git Commits

Mon, 06 Oct 2014 00:00:00 +0000

gumbler is a script I wrote to search through git commits. Examples from github are discussed below.

.gitignore

A gitignore file is used to specify files that should not be tracked by git (source gitignore). In the default case, gumbler will read the gitignore file for the project and search every revision for a case where a file from gitignore was committed. Possible use cases would be as a pen tester looking for reconnaisance data (e.g. developer usernames/passwords, staging hosts/services, etc.) or a developer to verify projects did not previously commit “secret” data.

I am a big fan of what Netflix is doing with regards to open source and security. After looking through a number of their projects, I noticied Priam has a few commits with non-damaging files from the gitignore.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21


$. git clone https://github.com/Netflix/Priam.git
Cloning into 'Priam'...
....
Checking connectivity... done.
$. ruby gumbler/gumbler.rb Priam/ gumbler_testing/tmp/
|-| Jumping to remote @directory Priam/
|-| Storing every revision
checking for *.com..
checking for *.class..
.....
|+| Looking for .classpath, Found it in BRANCH : 697fd66aae9beed107e13f49a741455f1d9d8dd9 .classpath. Storing it in gumbler_testing/tmp/.
|+| Looking for .classpath, Found it in BRANCH : 47bdb537789c034493e94d8977eae77ecbfd5b24 .classpath. Storing it in gumbler_testing/tmp/.
|+| Looking for .classpath, Found it in BRANCH : 442862d4a8d4d18d0e176ded8795dd45a24528fc .classpath. Storing it in gumbler_testing/tmp/.
....
checking for .project..
|+| Looking for .project, Found it in BRANCH : 697fd66aae9beed107e13f49a741455f1d9d8dd9 .project. Storing it in gumbler_testing/tmp/.
|+| Looking for .project, Found it in BRANCH : 0941d9e0e0dda3ee1d9d4dda757d59ffb641abcf .project. Storing it in gumbler_testing/tmp/.
|+| Looking for .project, Found it in BRANCH : 47bdb537789c034493e94d8977eae77ecbfd5b24 .project. Storing it in gumbler_testing/tmp/.
....
checking for .settings..
....

.classpath or .project are not damaging in this case and, hence, are used as the example. On a pen test or in collaborative projects I have found much worse (cough usernames, passwords). This shouldn’t be that surprising.

Searching Commit Logs

Another use case for gumbler is to look through commit history. Using Ruby on Rails as an example, we can search from for any commit with “CVE” in it. Gumbler will output a diff from the files changed in the commit.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23


$. ruby gumbler/gumbler.rb --grep CVE rails/ tmp/
|!| skipping .gitignore, searching commit log for CVE
$. ls tmp/
060c91cd59ab86583a8f2f52142960d3433f62f5-2012-05-30_15:13:03_-0700.diff 88cc1688d0cb828c17706b41a8bd27870f2a2beb-2013-01-08_12:11:18_-0800.diff
08d0a11a3f62718d601d39e617c834759cf59bbb-2014-02-18_15:38:50_-0300.diff 8be6913990c30f63618173da722148892348dcc9-2013-03-15_17:45:53_-0700.diff
0b58a7ff420d7ef4b643c521a62be7259dd2f5cb-2011-02-08_14:21:12_-0800.diff 8e577fe560d5756fcc67840ba304d79ada6804e4-2013-01-08_12:41:24_-0800.diff
0c7ac34aed1845044cd1911e5a775366d7ca41c1-2013-12-02_16:42:16_-0800.diff 9340f89849606dba02f44038171f3837f883fd4e-2012-05-30_15:09:13_-0700.diff
2392535f4085d88186097e3c23414e958fb1d16d-2013-03-18_10:17:32_-0700.diff 93fb4c1e62dc9605eecbfaffda2becc85890fa5f-2014-07-10_10:20:16_-0700.diff
...
$. cat 060c91cd59ab86583a8f2f52142960d3433f62f5-2012-05-30_15\:13\:03_-0700.diff 
060c91cd59ab86583a8f2f52142960d3433f62f5-2012-05-30 15:13:03 -0700==> 2012-05-30 15:13:03 -0700 Strip [nil] from parameters hash. Thanks to Ben Murphy for reporting this! Strip [nil] from parameters hash.
Thanks to Ben Murphy for reporting this!

CVE-2012-2660

:100644 100644 aa5ba3e... 6757a53... M actionpack/lib/action_dispatch/http/request.rb
:100644 100644 c3f009a... 6ea66f9... M actionpack/test/dispatch/request/query_string_parsing_test.rb

diff --git a/actionpack/lib/action_dispatch/http/request.rb b/actionpack/lib/action_dispatch/http/request.rb
index aa5ba3e..6757a53 100644
--- a/actionpack/lib/action_dispatch/http/request.rb
+++ b/actionpack/lib/action_dispatch/http/request.rb
....

As the README says, be careful using the tool as it uses Command Execution to search. A malicious git project could take advantage of this. Ping me with better ways to handle this.