Mercurial > vim
view src/os_dos.h @ 33664:06b59278bfcf v9.0.2070
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>
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Thu, 26 Oct 2023 22:30:03 +0200 |
parents | 695b50472e85 |
children |
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/* vi:set ts=8 sts=4 sw=4 noet: * * VIM - Vi IMproved by Bram Moolenaar * * Do ":help uganda" in Vim to read copying and usage conditions. * Do ":help credits" in Vim to see a list of people who contributed. */ /* * Common MS-DOS and Win32 (Windows NT and Windows 95) defines. * * Names for the EXRC, HELP and temporary files. * Some of these may have been defined in the makefile or feature.h. */ #ifndef SYS_VIMRC_FILE # define SYS_VIMRC_FILE "$VIM\\vimrc" #endif #ifndef USR_VIMRC_FILE # define USR_VIMRC_FILE "$HOME\\_vimrc" #endif #ifndef USR_VIMRC_FILE2 # define USR_VIMRC_FILE2 "$HOME\\vimfiles\\vimrc" #endif #ifndef USR_VIMRC_FILE3 # define USR_VIMRC_FILE3 "$VIM\\_vimrc" #endif #ifndef VIM_DEFAULTS_FILE # define VIM_DEFAULTS_FILE "$VIMRUNTIME\\defaults.vim" #endif #ifndef EVIM_FILE # define EVIM_FILE "$VIMRUNTIME\\evim.vim" #endif #ifndef USR_EXRC_FILE # define USR_EXRC_FILE "$HOME\\_exrc" #endif #ifndef USR_EXRC_FILE2 # define USR_EXRC_FILE2 "$VIM\\_exrc" #endif #ifdef FEAT_GUI # ifndef SYS_GVIMRC_FILE # define SYS_GVIMRC_FILE "$VIM\\gvimrc" # endif # ifndef USR_GVIMRC_FILE # define USR_GVIMRC_FILE "$HOME\\_gvimrc" # endif # ifndef USR_GVIMRC_FILE2 # define USR_GVIMRC_FILE2 "$HOME\\vimfiles\\gvimrc" # endif # ifndef USR_GVIMRC_FILE3 # define USR_GVIMRC_FILE3 "$VIM\\_gvimrc" # endif # ifndef SYS_MENU_FILE # define SYS_MENU_FILE "$VIMRUNTIME\\menu.vim" # endif #endif #ifndef SYS_OPTWIN_FILE # define SYS_OPTWIN_FILE "$VIMRUNTIME\\optwin.vim" #endif #ifdef FEAT_VIMINFO # ifndef VIMINFO_FILE # define VIMINFO_FILE "$HOME\\_viminfo" # endif # ifndef VIMINFO_FILE2 # define VIMINFO_FILE2 "$VIM\\_viminfo" # endif #endif #ifndef VIMRC_FILE # define VIMRC_FILE "_vimrc" #endif #ifndef EXRC_FILE # define EXRC_FILE "_exrc" #endif #ifdef FEAT_GUI # ifndef GVIMRC_FILE # define GVIMRC_FILE "_gvimrc" # endif #endif #ifndef DFLT_HELPFILE # define DFLT_HELPFILE "$VIMRUNTIME\\doc\\help.txt" #endif #ifndef SYNTAX_FNAME # define SYNTAX_FNAME "$VIMRUNTIME\\syntax\\%s.vim" #endif #ifndef DFLT_BDIR # define DFLT_BDIR ".,$TEMP,c:\\tmp,c:\\temp" // default for 'backupdir' #endif #ifndef DFLT_VDIR # define DFLT_VDIR "$HOME/vimfiles/view" // default for 'viewdir' #endif #ifndef DFLT_DIR # define DFLT_DIR ".,$TEMP,c:\\tmp,c:\\temp" // default for 'directory' #endif #define DFLT_ERRORFILE "errors.err" #define DFLT_RUNTIMEPATH "$HOME/vimfiles,$VIM/vimfiles,$VIMRUNTIME,$HOME/vimfiles/after,$VIM/vimfiles/after" #define CLEAN_RUNTIMEPATH "$VIM/vimfiles,$VIMRUNTIME,$VIM/vimfiles/after" #define CASE_INSENSITIVE_FILENAME // ignore case when comparing file names #define SPACE_IN_FILENAME #define BACKSLASH_IN_FILENAME #define USE_CRNL // lines end in CR-NL instead of NL #define HAVE_DUP // have dup() #define HAVE_ST_MODE // have stat.st_mode