Mercurial > vim
annotate 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 |
| rev | line source |
|---|---|
| 29756 | 1 vim9script |
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commit https://github.com/vim/vim/commit/46fceaaa8d1447a9588736d86eb4908214187b08
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2 |
| 29756 | 3 # Language: ConTeXt typesetting engine |
| 4 # Maintainer: Nicola Vitacolonna <nvitacolonna@gmail.com> | |
| 5 # Former Maintainers: Nikolai Weibull <now@bitwi.se> | |
| 30547 | 6 # Latest Revision: 2022 Sep 19 |
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7 |
| 29756 | 8 # Typesetting {{{ |
| 9 import autoload './typeset.vim' | |
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10 |
| 29756 | 11 export def ConTeXtCmd(path: string): list<string> |
| 30547 | 12 var cmd = ['mtxrun', '--script', 'context', '--nonstopmode', '--autogenerate'] |
| 13 if !empty(get(g:, 'context_extra_options', '')) | |
| 14 cmd += g:context_extra_options | |
| 15 endif | |
| 16 cmd->add(path) | |
| 17 return cmd | |
| 29756 | 18 enddef |
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19 |
| 29756 | 20 export def Typeset(bufname: string, env = {}, Cmd = ConTeXtCmd): bool |
| 21 return typeset.TypesetBuffer(bufname, Cmd, env, 'ConTeXt') | |
| 22 enddef | |
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23 |
| 29756 | 24 export def JobStatus() |
| 25 typeset.JobStatus('ConTeXt') | |
| 26 enddef | |
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27 |
| 29756 | 28 export def StopJobs() |
| 29 typeset.StopJobs('ConTeXt') | |
| 30 enddef | |
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31 |
| 29756 | 32 export def Log(bufname: string) |
| 33 execute 'edit' typeset.LogPath(bufname) | |
| 34 enddef | |
| 35 # }}} | |
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36 |
| 29756 | 37 # Completion {{{ |
| 38 def BinarySearch(base: string, keywords: list<string>): list<string> | |
| 39 const pat = '^' .. base | |
| 40 const len = len(keywords) | |
| 41 var res = [] | |
| 42 var lft = 0 | |
| 43 var rgt = len | |
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44 |
| 29756 | 45 # Find the leftmost index matching base |
| 46 while lft < rgt | |
| 47 var i = (lft + rgt) / 2 | |
| 48 if keywords[i] < base | |
| 49 lft = i + 1 | |
| 50 else | |
| 51 rgt = i | |
| 52 endif | |
| 53 endwhile | |
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54 |
| 29756 | 55 while lft < len && keywords[lft] =~ pat |
| 56 add(res, keywords[lft]) | |
| 57 lft += 1 | |
| 58 endwhile | |
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commit https://github.com/vim/vim/commit/46fceaaa8d1447a9588736d86eb4908214187b08
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59 |
| 29756 | 60 return res |
| 61 enddef | |
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| 29756 | 63 var isMetaPostBlock = false |
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64 |
| 29756 | 65 var MP_KEYWORDS: list<string> = [] |
| 66 var CTX_KEYWORDS: list<string> = [] | |
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commit https://github.com/vim/vim/commit/46fceaaa8d1447a9588736d86eb4908214187b08
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67 |
| 29756 | 68 # Complete only MetaPost keywords in MetaPost blocks, and complete only |
| 69 # ConTeXt keywords otherwise. | |
| 70 export def Complete(findstart: number, base: string): any | |
| 71 if findstart == 1 | |
| 72 if len(synstack(line("."), 1)) > 0 && synIDattr(synstack(line("."), 1)[0], "name") ==# 'contextMPGraphic' | |
| 73 isMetaPostBlock = true | |
| 74 return match(getline('.'), '\S\+\%' .. col('.') .. 'c') | |
| 75 endif | |
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commit https://github.com/vim/vim/commit/46fceaaa8d1447a9588736d86eb4908214187b08
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76 |
| 29756 | 77 # Complete only \commands starting with a backslash |
| 78 isMetaPostBlock = false | |
| 79 var pos = match(getline('.'), '\\\zs\S\+\%' .. col('.') .. 'c') | |
| 80 return (pos == -1) ? -3 : pos | |
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commit https://github.com/vim/vim/commit/46fceaaa8d1447a9588736d86eb4908214187b08
Christian Brabandt <cb@256bit.org>
parents:
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81 endif |
| 29756 | 82 |
| 83 if isMetaPostBlock | |
| 84 if empty(MP_KEYWORDS) | |
| 85 MP_KEYWORDS = sort(syntaxcomplete#OmniSyntaxList(['mf\w\+', 'mp\w\+'])) | |
| 86 endif | |
| 87 return BinarySearch(base, MP_KEYWORDS) | |
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commit https://github.com/vim/vim/commit/46fceaaa8d1447a9588736d86eb4908214187b08
Christian Brabandt <cb@256bit.org>
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88 endif |
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commit https://github.com/vim/vim/commit/46fceaaa8d1447a9588736d86eb4908214187b08
Christian Brabandt <cb@256bit.org>
parents:
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89 |
| 29756 | 90 if empty(CTX_KEYWORDS) |
| 91 CTX_KEYWORDS = sort(syntaxcomplete#OmniSyntaxList([ | |
| 92 'context\w\+', 'texAleph', 'texEtex', 'texLuatex', 'texOmega', | |
| 93 'texPdftex', 'texTex', 'texXeTeX' | |
| 94 ])) | |
| 95 endif | |
| 96 return BinarySearch(base, CTX_KEYWORDS) | |
| 97 enddef | |
| 98 # }}} | |
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commit https://github.com/vim/vim/commit/46fceaaa8d1447a9588736d86eb4908214187b08
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99 |
| 29756 | 100 # vim: sw=2 fdm=marker |