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CVE-2022-2183: patch 8.2.5151: reading beyond the end of the line with lisp indenting · vim/vim@8eba2bd

Out-of-bounds Read in GitHub repository vim/vim prior to 8.2.

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patch 8.2.5151: reading beyond the end of the line with lisp indenting

Problem: Reading beyond the end of the line with lisp indenting. Solution: Avoid going over the NUL at the end of the line.

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1 parent f7c7c3f commit 8eba2bd291b347e3008aa9e565652d51ad638cfa

Showing 3 changed files with 18 additions and 3 deletions.

    • indent.c
      • test_lispwords.vim
    • version.c

@@ -2076,8 +2076,11 @@ get_lisp_indent(void)

amount += 2;

else

{

that++;

amount++;

if (*that != NUL)

{

that++;

amount++;

}

firsttry = amount;

while (VIM_ISWHITE(*that))

@@ -1,4 +1,5 @@

" Tests for ‘lispwords’ settings being global-local

" Tests for ‘lispwords’ settings being global-local.

" And other lisp indent stuff.

set nocompatible viminfo+=nviminfo

@@ -85,4 +86,13 @@ func Test_lisp_indent()

set nolisp

endfunc

func Test_lisp_indent_works()

" This was reading beyond the end of the line

new

exe “norm a\tü(\<CR>=”

set lisp

norm ==

bwipe!

endfunc

" vim: shiftwidth=2 sts=2 expandtab

@@ -734,6 +734,8 @@ static char *(features[]) =

static int included_patches[] =

{ /* Add new patch number below this line */

/**/

5151,

/**/

5150,

/**/

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