Mercurial > vim
view runtime/indent/hog.vim @ 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 | 63b0b7b79b25 |
children |
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" Vim indent file " Language: hog (Snort.conf) " Maintainer: Victor Roemer, <vroemer@badsec.org> " Last Change: Mar 7, 2013 " Only load this indent file when no other was loaded. if exists("b:did_indent") finish endif let b:did_indent = 1 let b:undo_indent = 'setlocal smartindent< indentexpr< indentkeys<' setlocal nosmartindent setlocal indentexpr=GetHogIndent() setlocal indentkeys+=!^F,o,O,0# " Only define the function once. if exists("*GetHogIndent") finish endif let s:cpo_save = &cpo set cpo&vim let s:syn_blocks = '\<SnortRuleTypeBody\>' function s:IsInBlock(lnum) return synIDattr(synID(a:lnum, 1, 1), 'name') =~ s:syn_blocks endfunction function GetHogIndent() let prevlnum = prevnonblank(v:lnum-1) " Comment blocks have identical indent if getline(v:lnum) =~ '^\s*#' && getline(prevlnum) =~ '^\s*#' return indent(prevlnum) endif " Ignore comment lines when calculating indent while getline(prevlnum) =~ '^\s*#' let prevlnum = prevnonblank(prevlnum-1) if !prevlnum return previndent endif endwhile " Continuation of a line that wasn't indented let prevline = getline(prevlnum) if prevline =~ '^\k\+.*\\\s*$' return shiftwidth() endif " Continuation of a line that was indented if prevline =~ '\k\+.*\\\s*$' return indent(prevlnum) endif " Indent the next line if previous line contained a start of a block " definition ('{' or '('). if prevline =~ '^\k\+[^#]*{}\@!\s*$' " TODO || prevline =~ '^\k\+[^#]*()\@!\s*$' return shiftwidth() endif " Match inside of a block if s:IsInBlock(v:lnum) if prevline =~ "^\k\+.*$" return shiftwidth() else return indent(prevlnum) endif endif return 0 endfunction let &cpo = s:cpo_save unlet s:cpo_save