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>

.TH VIMDIFF 1 "2001 March 30"
.SH NAME
vimdiff \- edit between two and eight versions of a file with Vim and show differences
.SH SYNOPSIS
.br
.B vimdiff
[options] file1 file2 [file3 [file4 [file5 [file6 [file7 [file8]]]]]]
.PP
.B gvimdiff
.SH DESCRIPTION
.B Vimdiff
starts
.B Vim
on two up to eight files.
Each file gets its own window.
The differences between the files are highlighted.
This is a nice way to inspect changes and to move changes from one version
to another version of the same file.
.PP
See vim(1) for details about Vim itself.
.PP
When started as
.B gvimdiff
the GUI will be started, if available.
.PP
In each window the 'diff' option will be set, which causes the differences
to be highlighted.
.br
The 'wrap' and 'scrollbind' options are set to make the text look good.
.br
The 'foldmethod' option is set to "diff", which puts ranges of lines without
changes in a fold.  'foldcolumn' is set to two to make it easy to spot the
folds and open or close them.
.SH OPTIONS
Vertical splits are used to align the lines, as if the "\-O" argument was used.
To use horizontal splits instead, use the "\-o" argument.
.PP
For all other arguments see vim(1).
.SH SEE ALSO
vim(1)
.SH AUTHOR
Most of
.B Vim
was made by Bram Moolenaar, with a lot of help from others.
See ":help credits" in
.B Vim.