patch 9.0.2070: [security] disallow setting env in restricted mode Commit: https://github.com/vim/vim/commit/6b89dd6a7257a1e2e9c7ea070b407bc4674a5118 Author: Christian Brabandt <cb@256bit.org> Date: Thu Oct 26 22:14:17 2023 +0200 patch 9.0.2070: [security] disallow setting env in restricted mode Problem: [security] disallow setting env in restricted mode Solution: Setting environment variables in restricted mode could potentially be used to execute shell commands. Disallow this. restricted mode: disable allow setting of environment variables Setting environment variables in restricted mode, may have some unwanted consequences. So, for example by setting $GCONV_PATH in restricted mode and then calling the iconv() function, one may be able to execute some unwanted payload, because the `iconv_open()` function internally uses the `$GCONV_PATH` variable to find its conversion data. So let's disable setting environment variables, even so this is no complete protection, since we are not clearing the existing environment. I tried a few ways but wasn't successful :( One could also argue to disable the iconv() function completely in restricted mode, but who knows what other API functions can be influenced by setting some other unrelated environment variables. So let's leave it as it is currently. closes: #13394 See: https://huntr.com/bounties/b0a2eda1-459c-4e36-98e6-0cc7d7faccfe/ Signed-off-by: Christian Brabandt <cb@256bit.org>

// if_ole.idl - IDL source for the Vim OLE Automation interface
//
// Processed by the IDL compiler (MIDL) to generate the type library
// (Vim.tlb).
//
// Command line:
//   MIDL /proxy nul /iid iid_ole.c /h if_ole.h /tlb vim.tlb if_ole.idl

[
	object,
	uuid(0F0BFAE2-4C90-11d1-82D7-0004AC368519),  // IID_IVim
	helpstring("IVim"),
	pointer_default(unique),
	dual,
	oleautomation
]
interface IVim : IDispatch
{
	import "oaidl.idl";
	HRESULT SendKeys([in]BSTR keys);
	HRESULT Eval([in]BSTR expr, [out, retval]BSTR* result);
	HRESULT SetForeground(void);
	HRESULT GetHwnd([out, retval]UINT_PTR* result);
};

// Component and type library definitions
[
	uuid(0F0BFAE0-4C90-11d1-82D7-0004AC368519),		// LIBID_Vim
	helpstring("Vim OLE Interface 1.1 Type Library"),
	version(1.1)
]
library Vim
{
	importlib("stdole32.tlb");

	// Component
	[
		uuid(0F0BFAE1-4C90-11d1-82D7-0004AC368519),  // CLSID_Vim
		helpstring("Vim OLE Interface")
	]
	coclass Vim
	{
		[default] interface IVim;
	};
};