10:39 p.m.
commit 32427de03ea2a9baf70d4fb24fc0c8e96f0a4bc4
Author: Kevin Kofler <kevin.kofler(a)chello.at>
Date: Fri May 5 00:39:14 2017 +0200
Add CVE-2017-8105 and CVE-2017-8287 fixes from Fedora freetype
* Thu May 04 2017 Kevin Kofler <Kevin(a)tigcc.ticalc.org> 2.7.1-5
- Add freetype-2.7.1-protect-flex-handling.patch from Fedora freetype:
Better protect `flex' handling (CVE-2017-8105, rh#1446501)
- Add freetype-2.7.1-safety-guard.patch from Fedora freetype:
Add safety guard (CVE-2017-8287, rh#1446074)
freetype-2.7.1-protect-flex-handling.patch | 47 ++++++++++++++++++++++++++++++
freetype-2.7.1-safety-guard.patch | 36 +++++++++++++++++++++++
freetype-freeworld.spec | 16 ++++++++--
3 files changed, 97 insertions(+), 2 deletions(-)
---
diff --git a/freetype-2.7.1-protect-flex-handling.patch
b/freetype-2.7.1-protect-flex-handling.patch
new file mode 100644
index 0000000..01ff261
--- /dev/null
+++ b/freetype-2.7.1-protect-flex-handling.patch
@@ -0,0 +1,47 @@
+From f958c48ee431bef8d4d466b40c9cb2d4dbcb7791 Mon Sep 17 00:00:00 2001
+From: Werner Lemberg <wl(a)gnu.org>
+Date: Fri, 24 Mar 2017 09:15:10 +0100
+Subject: [PATCH] [psaux] Better protect `flex' handling.
+
+Reported as
+
+ https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=935
+
+* src/psaux/t1decode.c (t1_decoder_parse_charstrings)
+<callothersubr>: Since there is not a single flex operator but a
+series of subroutine calls, malformed fonts can call arbitrary other
+operators after the start of a flex, possibly adding points. For
+this reason we have to check the available number of points before
+inserting a point.
+---
+ ChangeLog | 15 +++++++++++++++
+ src/psaux/t1decode.c | 9 +++++++++
+ 2 files changed, 24 insertions(+)
+
+diff --git a/src/psaux/t1decode.c b/src/psaux/t1decode.c
+index af7b465e..7dd45135 100644
+--- a/src/psaux/t1decode.c
++++ b/src/psaux/t1decode.c
+@@ -780,10 +780,19 @@
+ /* point without adding any point to the outline */
+ idx = decoder->num_flex_vectors++;
+ if ( idx > 0 && idx < 7 )
++ {
++ /* in malformed fonts it is possible to have other */
++ /* opcodes in the middle of a flex (which don't */
++ /* increase `num_flex_vectors'); we thus have to */
++ /* check whether we can add a point */
++ if ( FT_SET_ERROR( t1_builder_check_points( builder, 1 ) ) )
++ goto Syntax_Error;
++
+ t1_builder_add_point( builder,
+ x,
+ y,
+ (FT_Byte)( idx == 3 || idx == 6 ) );
++ }
+ }
+ break;
+
+--
+2.12.2
+
diff --git a/freetype-2.7.1-safety-guard.patch b/freetype-2.7.1-safety-guard.patch
new file mode 100644
index 0000000..65ee149
--- /dev/null
+++ b/freetype-2.7.1-safety-guard.patch
@@ -0,0 +1,36 @@
+From 3774fc08b502c3e685afca098b6e8a195aded6a0 Mon Sep 17 00:00:00 2001
+From: Werner Lemberg <wl(a)gnu.org>
+Date: Sun, 26 Mar 2017 08:32:09 +0200
+Subject: [PATCH] * src/psaux/psobjs.c (t1_builder_close_contour): Add safety
+ guard.
+
+Reported as
+
+ https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=941
+---
+ ChangeLog | 8 ++++++++
+ src/psaux/psobjs.c | 8 ++++++++
+ 2 files changed, 16 insertions(+)
+
+diff --git a/src/psaux/psobjs.c b/src/psaux/psobjs.c
+index d18e821a..0baf8368 100644
+--- a/src/psaux/psobjs.c
++++ b/src/psaux/psobjs.c
+@@ -1718,6 +1718,14 @@
+ first = outline->n_contours <= 1
+ ? 0 : outline->contours[outline->n_contours - 2] + 1;
+
++ /* in malformed fonts it can happen that a contour was started */
++ /* but no points were added */
++ if ( outline->n_contours && first == outline->n_points )
++ {
++ outline->n_contours--;
++ return;
++ }
++
+ /* We must not include the last point in the path if it */
+ /* is located on the first point. */
+ if ( outline->n_points > 1 )
+--
+2.12.2
+
diff --git a/freetype-freeworld.spec b/freetype-freeworld.spec
index 13f4fb2..ad2237b 100644
--- a/freetype-freeworld.spec
+++ b/freetype-freeworld.spec
@@ -1,7 +1,7 @@
Summary: A free and portable font rendering engine
Name: freetype-freeworld
Version: 2.7.1
-Release: 4%{?dist}
+Release: 5%{?dist}
License: (FTL or GPLv2+) and BSD and MIT and Public Domain and zlib with acknowledgement
URL: http://www.freetype.org
Source: http://download.savannah.gnu.org/releases/freetype/freetype-%{version}.ta...
@@ -12,7 +12,11 @@ Patch21: freetype-2.3.0-enable-spr.patch
Patch46: freetype-2.2.1-enable-valid.patch
## Security fixes:
-# none needed yet
+# https://bugzilla.redhat.com/show_bug.cgi?id=1446500
+Patch94: freetype-2.7.1-protect-flex-handling.patch
+
+# https://bugzilla.redhat.com/show_bug.cgi?id=1446073
+Patch95: freetype-2.7.1-safety-guard.patch
Provides: freetype-bytecode
Provides: freetype-subpixel
@@ -42,6 +46,8 @@ It transparently overrides the system library using ld.so.conf.d.
%patch46 -p1 -b .enable-valid
+%patch94 -p1 -b .protect-flex-handling
+%patch95 -p1 -b .safety-guard
%build
%configure --disable-static \
@@ -85,6 +91,12 @@ echo "%{_libdir}/%{name}" \
%config(noreplace) %{_sysconfdir}/ld.so.conf.d/%{name}-%{_arch}.conf
%changelog
+* Thu May 04 2017 Kevin Kofler <Kevin(a)tigcc.ticalc.org> 2.7.1-5
+- Add freetype-2.7.1-protect-flex-handling.patch from Fedora freetype:
+ Better protect `flex' handling (CVE-2017-8105, rh#1446501)
+- Add freetype-2.7.1-safety-guard.patch from Fedora freetype:
+ Add safety guard (CVE-2017-8287, rh#1446074)
+
* Mon Apr 10 2017 Kevin Kofler <Kevin(a)tigcc.ticalc.org> 2.7.1-4
- Drop freetype-2.7.1-linear-scaling.patch again as per rh#1437999 discussion