Subject: [ASA-201806-1] git: multiple issues

Arch Linux Security Advisory ASA-201806-1
=========================================

Severity: Critical
Date    : 2018-06-01
CVE-ID  : CVE-2018-11233 CVE-2018-11235
Package : git
Type    : multiple issues
Remote  : Yes
Link    : https://security.archlinux.org/AVG-711

Summary
=======

The package git before version 2.17.1-1 is vulnerable to multiple
issues including arbitrary code execution and information disclosure.

Resolution
==========

Upgrade to 2.17.1-1.

# pacman -Syu "git>=2.17.1-1"

The problems have been fixed upstream in version 2.17.1.

Workaround
==========

None.

Description
===========

- CVE-2018-11233 (information disclosure)

A security issue has been found in git before 2.17.1, where the code
that sanify-check paths in is_ntfs_dotgit() could have been tricked
into reading random pieces of memory.

- CVE-2018-11235 (arbitrary code execution)

A security issue has been found in git before 2.17.1. With a crafted
.gitmodules file, a malicious project can execute an arbitrary script
on a machine that runs "git clone --recurse-submodules" because
submodule "names" are obtained from this file, and then appended to
$GIT_DIR/modules, leading to directory traversal with "../" in a name.
Finally, post-checkout hooks from a submodule are executed, bypassing
the intended design in which hooks are not obtained from a remote
server.

Impact
======

A remote attacker can execute arbitrary code on the affected host by
placing a crafted .gitmodules file in a repository cloned by a local
user, or access sensitive information via a crafted path in such a
repository.

References
==========

https://lkml.org/lkml/2018/5/29/889
https://github.com/gitster/git/commit/11a9f4d807a0d71dc6eff51bb87baf4ca2cccf1d
https://security.archlinux.org/CVE-2018-11233
https://security.archlinux.org/CVE-2018-11235