Fix CVE-2019-18397

Resolves: rhbz#1781218

fribidi-CVE-2019-18397.patch

@@ -0,0 +1,27 @@
+From 034c6e9a1d296286305f4cfd1e0072b879f52568 Mon Sep 17 00:00:00 2001
+From: Dov Grobgeld <dov.grobgeld@gmail.com>
+Date: Thu, 24 Oct 2019 09:37:29 +0300
+Subject: [PATCH] Truncate isolate_level to FRIBIDI_BIDI_MAX_EXPLICIT_LEVEL
+
+---
+ lib/fribidi-bidi.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/lib/fribidi-bidi.c b/lib/fribidi-bidi.c
+index 6c84392..d384878 100644
+--- a/lib/fribidi-bidi.c
++++ b/lib/fribidi-bidi.c
+@@ -747,7 +747,9 @@ fribidi_get_par_embedding_levels_ex (
+             }
+ 
+ 	  RL_LEVEL (pp) = level;
+-          RL_ISOLATE_LEVEL (pp) = isolate_level++;
++          RL_ISOLATE_LEVEL (pp) = isolate_level;
++          if (isolate_level < FRIBIDI_BIDI_MAX_EXPLICIT_LEVEL-1)
++              isolate_level++;
+           base_level_per_iso_level[isolate_level] = new_level;
+ 
+ 	  if (!FRIBIDI_IS_NEUTRAL (override))
+-- 
+2.23.0
+

fribidi.spec

@@ -1,7 +1,7 @@
 Summary: Library implementing the Unicode Bidirectional Algorithm
 Name: fribidi
 Version: 1.0.7
-Release: 1%{?dist}
+Release: 2%{?dist}
 URL: https://github.com/fribidi/fribidi/
 Source: https://github.com/%{name}/%{name}/releases/download/v%{version}/%{name}-%{version}.tar.bz2
 License: LGPLv2+ and UCD
@@ -13,6 +13,7 @@ BuildRequires: meson
 %endif
 Patch0: %{name}-drop-bundled-gnulib.patch
 Patch1: %{name}-automake.patch
+Patch2: %{name}-CVE-2019-18397.patch
 
 %description
 A library to handle bidirectional scripts (for example Hebrew, Arabic),
@@ -84,6 +85,10 @@ rm -f $RPM_BUILD_ROOT%{_libdir}/*.la
 #%%{_mandir}/man3/*.gz
 
 %changelog
+* Wed Dec 11 2019 Akira TAGOH <tagoh@redhat.com> - 1.0.7-2
+- Fix CVE-2019-18397
+  Resolves: rhbz#1781218
+
 * Mon Sep 30 2019 Akira TAGOH <tagoh@redhat.com> - 1.0.7-1
 - New upstream release.
   Resolves: rhbz#1756434