Mercurial > vim
view runtime/syntax/wvdial.vim @ 33865:8cdb69ea3711 v9.0.2143
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>
| author | Christian Brabandt <cb@256bit.org> |
|---|---|
| date | Sun, 10 Dec 2023 15:16:05 +0100 |
| parents | 3fc0f57ecb91 |
| children |
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" Vim syntax file " Language: Configuration file for WvDial " Maintainer: Prahlad Vaidyanathan <slime@vsnl.net> " Last Update: Mon, 15 Oct 2001 09:39:03 Indian Standard Time " Quit if syntax file is already loaded if exists("b:current_syntax") finish endif syn match wvdialComment "^;.*$"lc=1 syn match wvdialComment "[^\\];.*$"lc=1 syn match wvdialSection "^\s*\[.*\]" syn match wvdialValue "=.*$"ms=s+1 syn match wvdialValue "\s*[^ ;"' ]\+"lc=1 syn match wvdialVar "^\s*\(Inherits\|Modem\|Baud\|Init.\|Phone\|Area\ Code\|Dial\ Prefix\|Dial\ Command\|Login\|Login\| Prompt\|Password\|Password\ Prompt\|PPPD\ Path\|Force\ Address\|Remote\ Name\|Carrier\ Check\|Stupid\ [Mm]ode\|New\ PPPD\|Default\ Reply\|Auto\ Reconnect\|SetVolume\|Username\)" syn match wvdialEqual "=" " The default highlighting hi def link wvdialComment Comment hi def link wvdialSection PreProc hi def link wvdialVar Identifier hi def link wvdialValue String hi def link wvdialEqual Statement let b:current_syntax = "wvdial" "EOF vim: tw=78:ft=vim:ts=8