pcre: 8.39 -> 8.40 + security fix

CVE-2017-7186

refs nixos/security#57 #24319

2 files changed, 56 insertions, 2 deletions

diff --git a/pkgs/development/libraries/pcre/CVE-2017-7186.patch b/pkgs/development/libraries/pcre/CVE-2017-7186.patch
new file mode 100644
index 00000000000..e9e1997e47c
--- /dev/null
+++ b/pkgs/development/libraries/pcre/CVE-2017-7186.patch
@@ -0,0 +1,52 @@
+--- a/pcre_internal.h	2016/05/21 13:34:44	1649
++++ b/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
+--- a/pcre_ucd.c	2014/06/19 07:51:39	1490
++++ b/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):
diff --git a/pkgs/development/libraries/pcre/default.nix b/pkgs/development/libraries/pcre/default.nix
index d3499f3e15c..21de038f7d6 100644
--- a/pkgs/development/libraries/pcre/default.nix
+++ b/pkgs/development/libraries/pcre/default.nix
@@ -7,7 +7,7 @@ with stdenv.lib;
 assert elem variant [ null "cpp" "pcre16" "pcre32" ];
 
 let
-  version = "8.39";
+  version = "8.40";
   pname = if (variant == null) then "pcre"
     else  if (variant == "cpp") then "pcre-cpp"
     else  variant;
@@ -17,7 +17,7 @@ in stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-${version}.tar.bz2";
-    sha256 = "12wyajlqx2v7dsh39ra9v9m5hibjkrl129q90bp32c28haghjn5q";
+    sha256 = "1x7lpjn7jhk0n3sdvggxrlrhab8kkfjwl7qix0ypw9nlx8lpmqh0";
   };
 
   outputs = [ "bin" "dev" "out" "doc" "man" ];
@@ -29,6 +29,8 @@ in stdenv.mkDerivation rec {
   ]
     ++ optional (variant != null) "--enable-${variant}";
 
+  patches = [ ./CVE-2017-7186.patch ];
+
   doCheck = with stdenv; !(isCygwin || isFreeBSD);
     # XXX: test failure on Cygwin
     # we are running out of stack on both freeBSDs on Hydra