CVE-2021-4193 vim: vulnerable to Out-of-bounds Read
Resolves: CVE-2021-4193
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825cea52d2
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b7a801e714
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@ -0,0 +1,39 @@
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diff -up vim82/src/charset.c.cve4193 vim82/src/charset.c
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--- vim82/src/charset.c.cve4193 2021-03-22 10:02:42.000000000 +0100
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+++ vim82/src/charset.c 2022-01-13 10:14:55.634913386 +0100
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@@ -1232,10 +1232,15 @@ getvcol(
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posptr = NULL; // continue until the NUL
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else
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{
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- // Special check for an empty line, which can happen on exit, when
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- // ml_get_buf() always returns an empty string.
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- if (*ptr == NUL)
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- pos->col = 0;
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+ colnr_T i;
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+
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+ // In a few cases the position can be beyond the end of the line.
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+ for (i = 0; i < pos->col; ++i)
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+ if (ptr[i] == NUL)
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+ {
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+ pos->col = i;
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+ break;
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+ }
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posptr = ptr + pos->col;
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if (has_mbyte)
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// always start on the first byte
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diff -up vim82/src/testdir/test_regexp_latin.vim.cve4193 vim82/src/testdir/test_regexp_latin.vim
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--- vim82/src/testdir/test_regexp_latin.vim.cve4193 2022-01-13 10:14:55.634913386 +0100
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+++ vim82/src/testdir/test_regexp_latin.vim 2022-01-13 10:17:01.905292715 +0100
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@@ -938,4 +938,12 @@ func Test_regexp_last_subst_string()
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close!
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endfunc
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+func Test_using_invalid_visual_position()
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+ " this was going beyond the end of the line
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+ new
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+ exe "norm 0o000\<Esc>0\<C-V>$s0"
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+ /\%V
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+ bwipe!
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+endfunc
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+
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" vim: shiftwidth=2 sts=2 expandtab
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8
vim.spec
8
vim.spec
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@ -27,7 +27,7 @@ Summary: The VIM editor
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URL: http://www.vim.org/
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Name: vim
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Version: %{baseversion}.%{patchlevel}
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Release: 9%{?dist}
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Release: 10%{?dist}
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License: Vim and MIT
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Source0: ftp://ftp.vim.org/pub/vim/unix/vim-%{baseversion}-%{patchlevel}.tar.bz2
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Source1: virc
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@ -84,6 +84,8 @@ Patch3025: 0001-patch-8.2.3487-illegal-memory-access-if-buffer-name-.patch
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Patch3026: 0001-patch-8.2.3625-illegal-memory-access-when-C-indentin.patch
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# 2028431 - CVE-2021-4019 vim: heap-based buffer overflow in find_help_tags() in src/help.c [rhel-9.0]
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Patch3027: 0001-patch-8.2.3669-buffer-overflow-with-long-help-argume.patch
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# CVE-2021-4193 vim: vulnerable to Out-of-bounds Read
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Patch3028: 0001-patch-8.2.3950-going-beyond-the-end-of-the-line-with.patch
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# gcc is no longer in buildroot by default
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BuildRequires: gcc
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@ -298,6 +300,7 @@ perl -pi -e "s,bin/nawk,bin/awk,g" runtime/tools/mve.awk
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%patch3025 -p1 -b .cve-win-redr
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%patch3026 -p1 -b .cve3984
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%patch3027 -p1 -b .cve4019
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%patch3028 -p1 -b .cve4193
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%build
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cd src
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@ -855,6 +858,9 @@ touch %{buildroot}/%{_datadir}/%{name}/vimfiles/doc/tags
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%endif
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%changelog
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* Thu Jan 13 2022 Zdenek Dohnal <zdohnal@redhat.com> - 2:8.2.2637-10
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- CVE-2021-4193 vim: vulnerable to Out-of-bounds Read
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* Mon Dec 06 2021 Zdenek Dohnal <zdohnal@redhat.com> - 2:8.2.2637-9
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- 2028431 - CVE-2021-4019 vim: heap-based buffer overflow in find_help_tags() in src/help.c [rhel-9.0]
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