Fix for CVE-2019-13118 (#1728542)

CVE-2019-13118.patch

@@ -0,0 +1,72 @@
+From 6ce8de69330783977dd14f6569419489875fb71b Mon Sep 17 00:00:00 2001
+From: Nick Wellnhofer <wellnhofer@aevum.de>
+Date: Mon, 3 Jun 2019 13:14:45 +0200
+Subject: [PATCH] Fix uninitialized read with UTF-8 grouping chars
+
+The character type in xsltFormatNumberConversion was too narrow and
+an invalid character/length combination could be passed to
+xsltNumberFormatDecimal, resulting in an uninitialized read.
+
+Found by OSS-Fuzz.
+---
+ libxslt/numbers.c         | 5 +++--
+ tests/docs/bug-222.xml    | 1 +
+ tests/general/bug-222.out | 2 ++
+ tests/general/bug-222.xsl | 6 ++++++
+ 4 files changed, 12 insertions(+), 2 deletions(-)
+ create mode 100644 tests/docs/bug-222.xml
+ create mode 100644 tests/general/bug-222.out
+ create mode 100644 tests/general/bug-222.xsl
+
+diff --git a/libxslt/numbers.c b/libxslt/numbers.c
+index f1ed8846..20b99d5a 100644
+--- a/libxslt/numbers.c
++++ b/libxslt/numbers.c
+@@ -1298,13 +1298,14 @@ OUTPUT_NUMBER:
+     number = floor((scale * number + 0.5)) / scale;
+     if ((self->grouping != NULL) &&
+         (self->grouping[0] != 0)) {
++        int gchar;
+ 
+ 	len = xmlStrlen(self->grouping);
+-	pchar = xsltGetUTF8Char(self->grouping, &len);
++	gchar = xsltGetUTF8Char(self->grouping, &len);
+ 	xsltNumberFormatDecimal(buffer, floor(number), self->zeroDigit[0],
+ 				format_info.integer_digits,
+ 				format_info.group,
+-				pchar, len);
++				gchar, len);
+     } else
+ 	xsltNumberFormatDecimal(buffer, floor(number), self->zeroDigit[0],
+ 				format_info.integer_digits,
+diff --git a/tests/docs/bug-222.xml b/tests/docs/bug-222.xml
+new file mode 100644
+index 00000000..69d62f2c
+--- /dev/null
++++ b/tests/docs/bug-222.xml
+@@ -0,0 +1 @@
++<doc/>
+diff --git a/tests/general/bug-222.out b/tests/general/bug-222.out
+new file mode 100644
+index 00000000..e3139698
+--- /dev/null
++++ b/tests/general/bug-222.out
+@@ -0,0 +1,2 @@
++<?xml version="1.0"?>
++1⠢0
+diff --git a/tests/general/bug-222.xsl b/tests/general/bug-222.xsl
+new file mode 100644
+index 00000000..e32dc473
+--- /dev/null
++++ b/tests/general/bug-222.xsl
+@@ -0,0 +1,6 @@
++<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
++  <xsl:decimal-format name="f" grouping-separator="⠢"/>
++  <xsl:template match="/">
++    <xsl:value-of select="format-number(10,'#⠢0','f')"/>
++  </xsl:template>
++</xsl:stylesheet>
+-- 
+2.22.0
+
+

libxslt.spec

@@ -22,6 +22,8 @@ Patch1:         libxslt-1.1.26-utf8-docs.patch
 Patch2:         multilib2.patch
 # https://bugzilla.redhat.com/show_bug.cgi?id=1709698
 Patch3:         CVE-2019-11068.patch
+# https://gitlab.gnome.org/GNOME/libxslt/commit/6ce8de69330783977dd14f6569419489875fb71b
+Patch4:         CVE-2019-13118.patch
 
 %description
 This C library allows to transform XML files into other XML files