Mercurial > vim
view runtime/autoload/context.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 | 1e91e26ceebf |
children | d81556766132 |
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vim9script # Language: ConTeXt typesetting engine # Maintainer: Nicola Vitacolonna <nvitacolonna@gmail.com> # Former Maintainers: Nikolai Weibull <now@bitwi.se> # Latest Revision: 2022 Sep 19 # Typesetting {{{ import autoload './typeset.vim' export def ConTeXtCmd(path: string): list<string> var cmd = ['mtxrun', '--script', 'context', '--nonstopmode', '--autogenerate'] if !empty(get(g:, 'context_extra_options', '')) cmd += g:context_extra_options endif cmd->add(path) return cmd enddef export def Typeset(bufname: string, env = {}, Cmd = ConTeXtCmd): bool return typeset.TypesetBuffer(bufname, Cmd, env, 'ConTeXt') enddef export def JobStatus() typeset.JobStatus('ConTeXt') enddef export def StopJobs() typeset.StopJobs('ConTeXt') enddef export def Log(bufname: string) execute 'edit' typeset.LogPath(bufname) enddef # }}} # Completion {{{ def BinarySearch(base: string, keywords: list<string>): list<string> const pat = '^' .. base const len = len(keywords) var res = [] var lft = 0 var rgt = len # Find the leftmost index matching base while lft < rgt var i = (lft + rgt) / 2 if keywords[i] < base lft = i + 1 else rgt = i endif endwhile while lft < len && keywords[lft] =~ pat add(res, keywords[lft]) lft += 1 endwhile return res enddef var isMetaPostBlock = false var MP_KEYWORDS: list<string> = [] var CTX_KEYWORDS: list<string> = [] # Complete only MetaPost keywords in MetaPost blocks, and complete only # ConTeXt keywords otherwise. export def Complete(findstart: number, base: string): any if findstart == 1 if len(synstack(line("."), 1)) > 0 && synIDattr(synstack(line("."), 1)[0], "name") ==# 'contextMPGraphic' isMetaPostBlock = true return match(getline('.'), '\S\+\%' .. col('.') .. 'c') endif # Complete only \commands starting with a backslash isMetaPostBlock = false var pos = match(getline('.'), '\\\zs\S\+\%' .. col('.') .. 'c') return (pos == -1) ? -3 : pos endif if isMetaPostBlock if empty(MP_KEYWORDS) MP_KEYWORDS = sort(syntaxcomplete#OmniSyntaxList(['mf\w\+', 'mp\w\+'])) endif return BinarySearch(base, MP_KEYWORDS) endif if empty(CTX_KEYWORDS) CTX_KEYWORDS = sort(syntaxcomplete#OmniSyntaxList([ 'context\w\+', 'texAleph', 'texEtex', 'texLuatex', 'texOmega', 'texPdftex', 'texTex', 'texXeTeX' ])) endif return BinarySearch(base, CTX_KEYWORDS) enddef # }}} # vim: sw=2 fdm=marker