A git security update has been released for Arch Linux. This update address two security issues:
1) 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.
2) CVE-2018-11235 (arbitrary code execution). 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.
1) 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.
2) CVE-2018-11235 (arbitrary code execution). 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.
Arch Linux Security Advisory ASA-201806-1Git Security Update for Arch Linux
=========================================
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
