[pkgsrc/trunk]: pkgsrc/misc/screen misc/screen: Fix CVE-2021-26937 and anothe...

[kim <kim%pkgsrc.org@localhost>]

details:   https://anonhg.NetBSD.org/pkgsrc/rev/e8806b25546b
branches:  trunk
changeset: 448726:e8806b25546b
user:      kim <kim%pkgsrc.org@localhost>
date:      Sat Mar 13 07:24:04 2021 +0000

description:
misc/screen: Fix CVE-2021-26937 and another UTF-8 bug

diffstat:

 misc/screen/Makefile                 |   4 +-
 misc/screen/distinfo                 |   4 +-
 misc/screen/patches/patch-ansi.c     |  43 ++++++++++++++++++++++
 misc/screen/patches/patch-encoding.c |  68 ++++++++++++++++++++++++++++++++++++
 4 files changed, 116 insertions(+), 3 deletions(-)

diffs (153 lines):

diff -r 734ae537ac4e -r e8806b25546b misc/screen/Makefile
--- a/misc/screen/Makefile      Sat Mar 13 04:38:27 2021 +0000
+++ b/misc/screen/Makefile      Sat Mar 13 07:24:04 2021 +0000
@@ -1,7 +1,7 @@
-# $NetBSD: Makefile,v 1.118 2021/02/12 22:53:14 cjep Exp $
+# $NetBSD: Makefile,v 1.119 2021/03/13 07:24:04 kim Exp $
 
 DISTNAME=      screen-4.8.0
-PKGREVISION=   3
+PKGREVISION=   4
 CATEGORIES=    misc shells
 MASTER_SITES=  ${MASTER_SITE_GNU:=screen/}
 
diff -r 734ae537ac4e -r e8806b25546b misc/screen/distinfo
--- a/misc/screen/distinfo      Sat Mar 13 04:38:27 2021 +0000
+++ b/misc/screen/distinfo      Sat Mar 13 07:24:04 2021 +0000
@@ -1,4 +1,4 @@
-$NetBSD: distinfo,v 1.58 2021/02/12 22:53:14 cjep Exp $
+$NetBSD: distinfo,v 1.59 2021/03/13 07:24:04 kim Exp $
 
 SHA1 (screen-4.8.0.tar.gz) = 2328927e10e68d357bdfec7bd740726011e834e9
 RMD160 (screen-4.8.0.tar.gz) = 43888fa00f708a8a9aa226e0df39abd7181b15ae
@@ -13,9 +13,11 @@
 SHA1 (patch-al) = 74634eadfd53e217032e735adf09295868f11bd8
 SHA1 (patch-am) = a721e311e7dde7938de0e9546a7892bfd104ebd1
 SHA1 (patch-an) = bda6c65148410a6c9a13afd8ad34f93e33731552
+SHA1 (patch-ansi.c) = 741b1c789f8e30fb27c81413b317c27a7235a861
 SHA1 (patch-ao) = a45ae3186cd9bddeb915bad890f1be5abc315dd3
 SHA1 (patch-ap) = 4aab542045a0abe55e82d91851b94c3cb569139f
 SHA1 (patch-display.h) = 922ebe152d8c09fc016b983d8fe9c1c64ef74578
+SHA1 (patch-encoding.c) = f426f0118a76106f8063c8d0c0f36b4e4ad7ae0b
 SHA1 (patch-screen.c) = de5d8468100ab88cbdb842e21b04b00221e798b8
 SHA1 (patch-socket.c) = ef7d3cb14f0199383c0e750af48f19537eb0b36d
 SHA1 (patch-tty.sh) = 711e10879250de4b0e04bc2ec00472edeaf6aada
diff -r 734ae537ac4e -r e8806b25546b misc/screen/patches/patch-ansi.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/screen/patches/patch-ansi.c  Sat Mar 13 07:24:04 2021 +0000
@@ -0,0 +1,43 @@
+$NetBSD: patch-ansi.c,v 1.3 2021/03/13 07:24:04 kim Exp $
+
+https://salsa.debian.org/debian/screen/-/raw/master/debian/patches/52fix_screen_utf8_nfd.patch
+
+Author: Michael Schröder <mls%suse.de@localhost>
+Reviewed-By: Axel Beckert <abe%debian.org@localhost>
+Description: screen outputs screen "ÿ" after a connected character.
+ This is a character without the need. 
+ This happens in UTF-8 environment. 
+ Before : screen$ ruby1.9.1 -e 'puts "\u304b\u3099.."'
+          がÿ...
+ patch applied :  screen $ ruby1.9.1 -e 'puts "\u304b\u3099.."'
+          が..
+Origin: https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00012.html
+Bugs-Debian: https://bugs.debian.org/600246
+Bugs-Debian: https://bugs.debian.org/677512
+
+diff --git a/ansi.c b/ansi.c
+index 2a52edd..83b266d 100644
+--- ansi.c.orig
++++ ansi.c
+@@ -692,10 +692,6 @@ register int len;
+                   }
+                 curr->w_rend.font = 0;
+               }
+-#  ifdef DW_CHARS
+-            if (curr->w_encoding == UTF8 && utf8_isdouble(c))
+-              curr->w_mbcs = 0xff;
+-#  endif
+             if (curr->w_encoding == UTF8 && c >= 0x0300 && utf8_iscomb(c))
+               {
+                 int ox, oy;
+@@ -730,6 +726,10 @@ register int len;
+                   }
+                 break;
+               }
++#  ifdef DW_CHARS
++            if (curr->w_encoding == UTF8 && utf8_isdouble(c))
++              curr->w_mbcs = 0xff;
++#  endif
+             font = curr->w_rend.font;
+ # endif
+ # ifdef DW_CHARS
diff -r 734ae537ac4e -r e8806b25546b misc/screen/patches/patch-encoding.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/screen/patches/patch-encoding.c      Sat Mar 13 07:24:04 2021 +0000
@@ -0,0 +1,68 @@
+$NetBSD: patch-encoding.c,v 1.1 2021/03/13 07:24:04 kim Exp $
+
+https://salsa.debian.org/debian/screen/-/raw/master/debian/patches/99_CVE-2021-26937.patch
+
+Description: [CVE-2021-26937] Fix out of bounds array access
+Author: Michael Schröder <mls%suse.de@localhost>
+Bug-Debian: https://bugs.debian.org/982435
+Bug: https://savannah.gnu.org/bugs/?60030
+Bug: https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.html
+Bug-OSS-Security: https://www.openwall.com/lists/oss-security/2021/02/09/3
+Origin: https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00010.html
+
+--- encoding.c.orig
++++ encoding.c
+@@ -43,7 +43,7 @@
+ # ifdef UTF8
+ static int   recode_char __P((int, int, int));
+ static int   recode_char_to_encoding __P((int, int));
+-static void  comb_tofront __P((int, int));
++static void  comb_tofront __P((int));
+ #  ifdef DW_CHARS
+ static int   recode_char_dw __P((int, int *, int, int));
+ static int   recode_char_dw_to_encoding __P((int, int *, int));
+@@ -1263,6 +1263,8 @@
+     {0x30000, 0x3FFFD},
+   };
+ 
++  if (c >= 0xdf00 && c <= 0xdfff)
++    return 1;          /* dw combining sequence */
+   return ((bisearch(c, wide, sizeof(wide) / sizeof(struct interval) - 1)) ||
+           (cjkwidth &&
+            bisearch(c, ambiguous,
+@@ -1330,11 +1332,12 @@
+ }
+ 
+ static void
+-comb_tofront(root, i)
+-int root, i;
++comb_tofront(i)
++int i;
+ {
+   for (;;)
+     {
++      int root = i >= 0x700 ? 0x801 : 0x800;
+       debug1("bring to front: %x\n", i);
+       combchars[combchars[i]->prev]->next = combchars[i]->next;
+       combchars[combchars[i]->next]->prev = combchars[i]->prev;
+@@ -1396,9 +1399,9 @@
+     {
+       /* full, recycle old entry */
+       if (c1 >= 0xd800 && c1 < 0xe000)
+-        comb_tofront(root, c1 - 0xd800);
++        comb_tofront(c1 - 0xd800);
+       i = combchars[root]->prev;
+-      if (c1 == i + 0xd800)
++      if (i == 0x800 || i == 0x801 || c1 == i + 0xd800)
+       {
+         /* completely full, can't recycle */
+         debug("utf8_handle_comp: completely full!\n");
+@@ -1422,7 +1425,7 @@
+   mc->font  = (i >> 8) + 0xd8;
+   mc->fontx = 0;
+   debug3("combinig char %x %x -> %x\n", c1, c, i + 0xd800);
+-  comb_tofront(root, i);
++  comb_tofront(i);
+ }
+ 
+ #else /* !UTF8 */