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>

/* diff.c */
void diff_buf_delete(buf_T *buf);
void diff_buf_adjust(win_T *win);
void diff_buf_add(buf_T *buf);
void diff_invalidate(buf_T *buf);
void diff_mark_adjust(linenr_T line1, linenr_T line2, long amount, long amount_after);
void diff_redraw(int dofold);
int diff_internal(void);
void ex_diffupdate(exarg_T *eap);
void ex_diffpatch(exarg_T *eap);
void ex_diffsplit(exarg_T *eap);
void ex_diffthis(exarg_T *eap);
void diff_win_options(win_T *wp, int addbuf);
void ex_diffoff(exarg_T *eap);
void diff_clear(tabpage_T *tp);
int diff_check(win_T *wp, linenr_T lnum);
int diff_check_fill(win_T *wp, linenr_T lnum);
void diff_set_topline(win_T *fromwin, win_T *towin);
int diffopt_changed(void);
int diffopt_horizontal(void);
int diffopt_hiddenoff(void);
int diffopt_closeoff(void);
int diff_find_change(win_T *wp, linenr_T lnum, int *startp, int *endp);
int diff_infold(win_T *wp, linenr_T lnum);
void nv_diffgetput(int put, long count);
void ex_diffgetput(exarg_T *eap);
int diff_mode_buf(buf_T *buf);
int diff_move_to(int dir, long count);
linenr_T diff_get_corresponding_line(buf_T *buf1, linenr_T lnum1);
linenr_T diff_lnum_win(linenr_T lnum, win_T *wp);
void f_diff_filler(typval_T *argvars, typval_T *rettv);
void f_diff_hlID(typval_T *argvars, typval_T *rettv);
/* vim: set ft=c : */