On Sun, Oct 24, 2021 at 9:29 PM Minjae Kim <flower...@gmail.com> wrote: > > vim is vulnerable to Use After Free > Problem: Checking first character of url twice. > > reference: > https://github.com/vim/vim/commit/35a9a00afcb20897d462a766793ff45534810dc3 > > Signed-off-by: Minjae Kim <flower...@gmail.com> > --- > .../vim/files/CVE-2021-3796.patch | 50 +++++++++++++++++++ > 1 file changed, 50 insertions(+) > create mode 100644 meta/recipes-support/vim/files/CVE-2021-3796.patch
You don't seem to be adding the patch to the SRC_URI in the recipe! Steve > > diff --git a/meta/recipes-support/vim/files/CVE-2021-3796.patch > b/meta/recipes-support/vim/files/CVE-2021-3796.patch > new file mode 100644 > index 0000000000..666bd5c48b > --- /dev/null > +++ b/meta/recipes-support/vim/files/CVE-2021-3796.patch > @@ -0,0 +1,50 @@ > +From 6d02e1429771c00046b48f26e53ca4123c3ce4e1 Mon Sep 17 00:00:00 2001 > +From: Bram Moolenaar <b...@vim.org> > +Date: Fri, 24 Sep 2021 16:01:09 +0800 > +Subject: [PATCH] patch 8.2.3428: using freed memory when replacing > + > +Problem: Using freed memory when replacing. (Dhiraj Mishra) > +Solution: Get the line pointer after calling ins_copychar(). > + > +Upstream-Status: Backport > [https://github.com/vim/vim/commit/35a9a00afcb20897d462a766793ff45534810dc3] > +CVE: CVE-2021-3796 > + > +Signed-off-by: Minjae Kim <flower...@gmail.com> > +--- > + src/normal.c | 10 +++++++--- > + 1 file changed, 7 insertions(+), 3 deletions(-) > + > +diff --git a/src/normal.c b/src/normal.c > +index c4963e621..305b514bc 100644 > +--- a/src/normal.c > ++++ b/src/normal.c > +@@ -5009,19 +5009,23 @@ nv_replace(cmdarg_T *cap) > + { > + /* > + * Get ptr again, because u_save and/or showmatch() will have > +- * released the line. At the same time we let know that the > +- * line will be changed. > ++ * released the line. This may also happen in ins_copychar(). > ++ * At the same time we let know that the line will be changed. > + */ > +- ptr = ml_get_buf(curbuf, curwin->w_cursor.lnum, TRUE); > + if (cap->nchar == Ctrl_E || cap->nchar == Ctrl_Y) > + { > + int c = ins_copychar(curwin->w_cursor.lnum > + + (cap->nchar == Ctrl_Y ? -1 : 1)); > ++ > ++ ptr = ml_get_buf(curbuf, curwin->w_cursor.lnum, TRUE); > + if (c != NUL) > + ptr[curwin->w_cursor.col] = c; > + } > + else > ++ { > ++ ptr = ml_get_buf(curbuf, curwin->w_cursor.lnum, TRUE); > + ptr[curwin->w_cursor.col] = cap->nchar; > ++ } > + if (p_sm && msg_silent == 0) > + showmatch(cap->nchar); > + ++curwin->w_cursor.col; > +-- > +2.17.1 > + > -- > 2.30.1 (Apple Git-130) > > > >
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