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fix CVE-2017-7186 Fix CVE-2017-7186 mentioned in https://bugs.exim.org/show_bug.cgi?id=2052

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Signed-off-by: Thomas Heil <heil@terminal-consulting.de>
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Thomas Heil 2017-03-27 10:03:16 +02:00 committed by Zoltan HERPAI
parent 5c64d6a6d3
commit a83284d7bd
2 changed files with 54 additions and 1 deletions
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2
libs/pcre/Makefile
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@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=pcre
PKG_VERSION:=8.40
PKG_RELEASE:=1
PKG_RELEASE:=2
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
PKG_SOURCE_URL:=ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/

53
libs/pcre/patches/001-CVE-2017-7186 Normal file
View file

@ -0,0 +1,53 @@
#CVE-2017-7186 patch
--- trunk/pcre_internal.h 2016/05/21 13:34:44 1649
+++ trunk/pcre_internal.h 2017/02/24 17:30:30 1688
@@ -2772,6 +2772,9 @@
extern const pcre_uint16 PRIV(ucd_stage2)[];
extern const pcre_uint32 PRIV(ucp_gentype)[];
extern const pcre_uint32 PRIV(ucp_gbtable)[];
+#ifdef COMPILE_PCRE32
+extern const ucd_record PRIV(dummy_ucd_record)[];
+#endif
#ifdef SUPPORT_JIT
extern const int PRIV(ucp_typerange)[];
#endif
@@ -2780,9 +2783,15 @@
/* UCD access macros */
#define UCD_BLOCK_SIZE 128
-#define GET_UCD(ch) (PRIV(ucd_records) + \
+#define REAL_GET_UCD(ch) (PRIV(ucd_records) + \
PRIV(ucd_stage2)[PRIV(ucd_stage1)[(int)(ch) / UCD_BLOCK_SIZE] * \
UCD_BLOCK_SIZE + (int)(ch) % UCD_BLOCK_SIZE])
+
+#ifdef COMPILE_PCRE32
+#define GET_UCD(ch) ((ch > 0x10ffff)? PRIV(dummy_ucd_record) : REAL_GET_UCD(ch))
+#else
+#define GET_UCD(ch) REAL_GET_UCD(ch)
+#endif
#define UCD_CHARTYPE(ch) GET_UCD(ch)->chartype
#define UCD_SCRIPT(ch) GET_UCD(ch)->script
--- trunk/pcre_ucd.c 2014/06/19 07:51:39 1490
+++ trunk/pcre_ucd.c 2017/02/24 17:30:30 1688
@@ -38,6 +38,20 @@
const pcre_uint32 PRIV(ucd_caseless_sets)[] = {0};
#else
+/* If the 32-bit library is run in non-32-bit mode, character values
+greater than 0x10ffff may be encountered. For these we set up a
+special record. */
+
+#ifdef COMPILE_PCRE32
+const ucd_record PRIV(dummy_ucd_record)[] = {{
+ ucp_Common, /* script */
+ ucp_Cn, /* type unassigned */
+ ucp_gbOther, /* grapheme break property */
+ 0, /* case set */
+ 0, /* other case */
+ }};
+#endif
+
/* When recompiling tables with a new Unicode version, please check the
types in this structure definition from pcre_internal.h (the actual
field names will be different):