patch 9.0.1833: [security] runtime file fixes Commit: https://github.com/vim/vim/commit/816fbcc262687b81fc46f82f7bbeb1453addfe0c Author: Christian Brabandt <cb@256bit.org> Date: Thu Aug 31 23:52:30 2023 +0200 patch 9.0.1833: [security] runtime file fixes Problem: runtime files may execute code in current dir Solution: only execute, if not run from current directory The perl, zig and ruby filetype plugins and the zip and gzip autoload plugins may try to load malicious executable files from the current working directory. This is especially a problem on windows, where the current directory is implicitly in your $PATH and windows may even run a file with the extension `.bat` because of $PATHEXT. So make sure that we are not trying to execute a file from the current directory. If this would be the case, error out (for the zip and gzip) plugins or silently do not run those commands (for the ftplugins). This assumes, that only the current working directory is bad. For all other directories, it is assumed that those directories were intentionally set to the $PATH by the user. Signed-off-by: Christian Brabandt <cb@256bit.org>

/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved		by Bram Moolenaar
 *				GUI support by Robert Webb
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 * See README.txt for an overview of the Vim source code.
 */
/*
 * Windows GUI: main program (EXE) entry point:
 *
 * Ron Aaron <ronaharon@yahoo.com> wrote this and the (now deleted) DLL support
 * code.
 */
#include "vim.h"

// cproto doesn't create a prototype for VimMain()
#ifdef VIMDLL
__declspec(dllimport)
#endif
int VimMain(int argc, char **argv);
#ifndef VIMDLL
void SaveInst(HINSTANCE hInst);
#endif

#ifndef PROTO
# ifdef FEAT_GUI
    int WINAPI
wWinMain(
    HINSTANCE	hInstance,
    HINSTANCE	hPrevInst UNUSED,
    LPWSTR	lpszCmdLine UNUSED,
    int		nCmdShow UNUSED)
# else
    int
wmain(int argc UNUSED, wchar_t **argv UNUSED)
# endif
{
# ifndef VIMDLL
#  ifdef FEAT_GUI
    SaveInst(hInstance);
#  else
    SaveInst(GetModuleHandleW(NULL));
#  endif
# endif
    VimMain(0, NULL);

    return 0;
}
#endif