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.
Git Security Update for Arch Linux