GitPython: Arbitrary Git Repository Creation Outside the Working Tree via Unvalidated .gitmodules Submodule Name in GitPython

Summary GitPython computes the on-disk location of a submodule's separate Git directory .git/modules/ from the submodule's .gitmodules section name with no validation. Because that name is fully attacker-controlled content of a cloned repository, a malicious repository can set a submodule name to...