Mercurial > vim
view src/iscygpty.h @ 33879:d418c82f02a4 v9.0.2149
patch 9.0.2149: [security]: use-after-free in exec_instructions()
Commit: https://github.com/vim/vim/commit/5dd41d4b6370b7b7d09d691f9252b3899c66102a
Author: Christian Brabandt <cb@256bit.org>
Date: Mon Dec 4 22:52:23 2023 +0100
patch 9.0.2149: [security]: use-after-free in exec_instructions()
Problem: [security]: use-after-free in exec_instructions()
Solution: get tv pointer again
[security]: use-after-free in exec_instructions()
exec_instructions may access freed memory, if the GA_GROWS_FAILS()
re-allocates memory. When this happens, the typval tv may still point to
now already freed memory. So let's get that pointer again and compare it
with tv. If those two pointers differ, tv is now invalid and we have to
refresh the tv pointer.
closes: #13621
Signed-off-by: Christian Brabandt <cb@256bit.org>
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Sun, 10 Dec 2023 15:16:17 +0100 |
parents | 6e3dc2d630c2 |
children |
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/* * iscygpty.h -- part of ptycheck * https://github.com/k-takata/ptycheck * * Copyright (c) 2015-2017 K.Takata * * You can redistribute it and/or modify it under the terms of either * the MIT license (as described below) or the Vim license. * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef _ISCYGPTY_H #define _ISCYGPTY_H #ifdef _WIN32 int is_cygpty(int fd); int is_cygpty_used(void); #else #define is_cygpty(fd) 0 #define is_cygpty_used() 0 #endif #endif // _ISCYGPTY_H