CVE-2023-22490

Git is a revision control system. Using a specially-crafted repository, Git
prior to versions 2.39.2, 2.38.4, 2.37.6, 2.36.5, 2.35.7, 2.34.7, 2.33.7,
2.32.6, 2.31.7, and 2.30.8 can be tricked into using its local clone
optimization even when using a non-local transport. Though Git will abort
local clones whose source $GIT_DIR/objects directory contains symbolic
links, the objects directory itself may still be a symbolic link. These
two may be combined to include arbitrary files based on known paths on the
victim’s filesystem within the malicious repository’s working copy,
allowing for data exfiltration in a similar manner as CVE-2022-39253. A fix
has been prepared and will appear in v2.39.2 v2.38.4 v2.37.6 v2.36.5
v2.35.7 v2.34.7 v2.33.7 v2.32.6, v2.31.7 and v2.30.8. If upgrading is
impractical, two short-term workarounds are available. Avoid cloning
repositories from untrusted sources with --recurse-submodules. Instead,
consider cloning repositories without recursively cloning their submodules,
and instead run git submodule update at each layer. Before doing so,
inspect each new .gitmodules file to ensure that it does not contain
suspicious module URLs.