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Category:   Application (Generic)  >   Git Vendors:   kernel.org
(Oracle Issues Fix for Oracle Linux) Git 'git clone' Lets Remote Users Execute Arbitrary Code When Cloning to a Target System
SecurityTracker Alert ID:  1042061
SecurityTracker URL:  http://securitytracker.com/id/1042061
CVE Reference:   CVE-2018-17456   (Links to External Site)
Date:  Nov 12 2018
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Git. A remote user can execute arbitrary code on the target system.

A user can create a specially crafted '.gitmodules' file in a project to be cloned with '--recurse-submodules'. When the target user subsequently issues a 'git clone --recurse-submodules' command, the target user's git command will pass the 'git clone' data from the URL as an object and execute the script.

joernchen reported this vulnerability.

Impact:   A remote user can execute arbitrary code on the target system.
Solution:   Oracle has issued a fix.

The Oracle Linux advisory is available at:

http://linux.oracle.com/errata/ELSA-2018-3408.html

Vendor URL:  linux.oracle.com/errata/ELSA-2018-3408.html (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Oracle)
Underlying OS Comments:  7

Message History:   This archive entry is a follow-up to the message listed below.
Oct 8 2018 Git 'git clone' Lets Remote Users Execute Arbitrary Code When Cloning to a Target System



 Source Message Contents

Subject:  [El-errata] ELSA-2018-3408 Important: Oracle Linux 7 git security update

Oracle Linux Security Advisory ELSA-2018-3408

http://linux.oracle.com/errata/ELSA-2018-3408.html

The following updated rpms for Oracle Linux 7 have been uploaded to the 
Unbreakable Linux Network:

x86_64:
emacs-git-1.8.3.1-20.el7.noarch.rpm
emacs-git-el-1.8.3.1-20.el7.noarch.rpm
git-1.8.3.1-20.el7.x86_64.rpm
git-all-1.8.3.1-20.el7.noarch.rpm
git-bzr-1.8.3.1-20.el7.noarch.rpm
git-cvs-1.8.3.1-20.el7.noarch.rpm
git-daemon-1.8.3.1-20.el7.x86_64.rpm
git-email-1.8.3.1-20.el7.noarch.rpm
git-gnome-keyring-1.8.3.1-20.el7.x86_64.rpm
git-gui-1.8.3.1-20.el7.noarch.rpm
git-hg-1.8.3.1-20.el7.noarch.rpm
git-instaweb-1.8.3.1-20.el7.noarch.rpm
git-p4-1.8.3.1-20.el7.noarch.rpm
git-svn-1.8.3.1-20.el7.x86_64.rpm
gitk-1.8.3.1-20.el7.noarch.rpm
gitweb-1.8.3.1-20.el7.noarch.rpm
perl-Git-1.8.3.1-20.el7.noarch.rpm
perl-Git-SVN-1.8.3.1-20.el7.noarch.rpm


SRPMS:
http://oss.oracle.com/ol7/SRPMS-updates/git-1.8.3.1-20.el7.src.rpm



Description of changes:

[1.8.3.1-20]
- Fix CVE-2018-17456: arbitrary code execution via .gitmodules
   Thanks to Jonathan Nieder <jrnieder@gmail.com> for backporting to 2.1.x
   and to Steve Beattie <sbeattie@ubuntu.com> for backporting to 1.9.1


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