patch 9.0.2143: [security]: buffer-overflow in ex_substitute Commit: https://github.com/vim/vim/commit/abfa13ebe92d81aaf66669c428d767847b577453 Author: Christian Brabandt <cb@256bit.org> Date: Thu Nov 30 11:32:18 2023 +0100 patch 9.0.2143: [security]: buffer-overflow in ex_substitute Problem: [security]: buffer-overflow in ex_substitute Solution: clear memory after allocating When allocating the new_start pointer in ex_substitute() the memory pointer points to some garbage that the following for loop in ex_cmds.c:4743 confuses and causes it to accessing the new_start pointer beyond it's size, leading to a buffer-overlow. So fix this by using alloc_clear() instead of alloc(), which will clear the memory by NUL and therefore cause the loop to terminate correctly. Reported by @henices, thanks! closes: #13596 Signed-off-by: Christian Brabandt <cb@256bit.org>

" Vim filetype plugin file
" Language:	csc
"
" This runtime file is looking for a new maintainer.
"
" Former maintainer:	Dan Sharp
" Last Changed: 20 Jan 2009

if exists("b:did_ftplugin") | finish | endif
let b:did_ftplugin = 1

" Make sure the continuation lines below do not cause problems in
" compatibility mode.
let s:save_cpo = &cpo
set cpo-=C

if exists("loaded_matchit")
    let b:match_words=
	\ '\<fix\>:\<endfix\>,' .
	\ '\<if\>:\<else\%(if\)\=\>:\<endif\>,' .
	\ '\<!loopondimensions\>\|\<!looponselected\>:\<!endloop\>'
endif

" Undo the stuff we changed.
let b:undo_ftplugin = "unlet! b:match_words"

" Restore the saved compatibility options.
let &cpo = s:save_cpo
unlet s:save_cpo