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gnu: pcre: Patch CVE-2017-7186.

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* gnu/packages/patches/pcre-CVE-2017-7186.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/pcre.scm (pcre)[replacement]: New field.
(pcre/fixed): New variable.
This commit is contained in:
Ludovic Courtès 2017-04-10 15:35:24 +02:00
parent 18d0cec29e
commit a97f0ee136
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3 changed files with 67 additions and 0 deletions
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1
gnu/local.mk
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@ -825,6 +825,7 @@ dist_patch_DATA = \
%D%/packages/patches/patchelf-rework-for-arm.patch \
%D%/packages/patches/patchutils-xfail-gendiff-tests.patch \
%D%/packages/patches/patch-hurd-path-max.patch \
%D%/packages/patches/pcre-CVE-2017-7186.patch \
%D%/packages/patches/pcre2-CVE-2017-7186.patch \
%D%/packages/patches/perl-autosplit-default-time.patch \
%D%/packages/patches/perl-deterministic-ordering.patch \

56
gnu/packages/patches/pcre-CVE-2017-7186.patch Normal file
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@ -0,0 +1,56 @@
Patch for <https://nvd.nist.gov/vuln/detail?vulnId=CVE-2017-7186>
from <https://vcs.pcre.org/pcre?view=revision&revision=1688>.
--- 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):

10
gnu/packages/pcre.scm
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@ -4,6 +4,7 @@
;;; Copyright © 2015 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2016 Leo Famulari <leo@famulari.name>
;;; Copyright © 2017 Marius Bakke <mbakke@fastmail.com>
;;; Copyright © 2017 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -33,6 +34,7 @@
(package
(name "pcre")
(version "8.40")
(replacement pcre/fixed)
(source (origin
(method url-fetch)
(uri (list
@ -70,6 +72,14 @@ POSIX regular expression API.")
(license license:bsd-3)
(home-page "http://www.pcre.org/")))
(define pcre/fixed
(package
(inherit pcre)
(replacement #f)
(source (origin
(inherit (package-source pcre))
(patches (search-patches "pcre-CVE-2017-7186.patch"))))))
(define-public pcre2
(package
(name "pcre2")