1 files changed, 59 insertions, 0 deletions
diff --git a/meta/recipes-extended/ghostscript/files/0001-Bug-699795-add-operand-checking-to-.setnativefontmap.patch b/meta/recipes-extended/ghostscript/files/0001-Bug-699795-add-operand-checking-to-.setnativefontmap.patch
new file mode 100644
index 0000000000..f175da0caf
--- /dev/null
+++ b/meta/recipes-extended/ghostscript/files/0001-Bug-699795-add-operand-checking-to-.setnativefontmap.patch
@@ -0,0 +1,59 @@
+From 274b2cc08b0d10a4cac3fe8b50022889f22580cb Mon Sep 17 00:00:00 2001
+From: Chris Liddell <chris.liddell@artifex.com>
+Date: Thu, 20 Sep 2018 16:35:28 +0100
+Subject: [PATCH 1/5] Bug 699795: add operand checking to
+ .setnativefontmapbuilt
+
+.setnativefontmapbuilt .forceputs a value into systemdict - it is intended
+to be a boolean, but in this case was being called with a compound object
+(a dictionary). Such an object, in local VM, being forced into systemdict
+would then confuse the garbager, since it could be restored away with the
+reference remaining.
+
+This adds operand checking, so .setnativefontmapbuilt will simply ignore
+anything other than a boolean value, and also removes the definition of
+.setnativefontmapbuilt after use, since it is only used in two, closely
+related places.
+
+CVE: CVE-2018-17961
+Upstream-Status: Backport [git://git.ghostscript.com/ghostpdl.git]
+Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
+---
+ Resource/Init/gs_fonts.ps | 11 ++++++++---
+ 1 file changed, 8 insertions(+), 3 deletions(-)
+
+diff --git a/Resource/Init/gs_fonts.ps b/Resource/Init/gs_fonts.ps
+index 38f0f6c..45b6613 100644
+--- a/Resource/Init/gs_fonts.ps
++++ b/Resource/Init/gs_fonts.ps
+@@ -372,9 +372,13 @@ FONTPATH length 0 eq { (%END FONTPATH) .skipeof } if
+ % of strings: what the system thinks is the ps name,
+ % and the access path.
+ /.setnativefontmapbuilt { % set whether we've been run
+-  systemdict exch /.nativefontmapbuilt exch .forceput
++  dup type /booleantype eq {
++      systemdict exch /.nativefontmapbuilt exch .forceput
++  }
++  {pop}
++  ifelse
+ } .bind executeonly def
+-systemdict /NONATIVEFONTMAP known .setnativefontmapbuilt
++systemdict /NONATIVEFONTMAP known //.setnativefontmapbuilt exec
+ /.buildnativefontmap {   % - .buildnativefontmap <bool>
+   systemdict /.nativefontmapbuilt .knownget not
+   { //false} if
+@@ -415,9 +419,10 @@ systemdict /NONATIVEFONTMAP known .setnativefontmapbuilt
+       } forall
+     } if
+     % record that we've been run
+-    //true .setnativefontmapbuilt
++    //true //.setnativefontmapbuilt exec
+   } ifelse
+ } bind def
++currentdict /.setnativefontmapbuilt .forceundef
+ 
+ % Create the dictionary that registers the .buildfont procedure
+ % (called by definefont) for each FontType.
+-- 
+2.7.4
+