pcre: Fix CVE-2015-5073

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/config/rootfiles/core/93/filelists/pcre b/config/rootfiles/core/93/filelists/pcre
new file mode 120000 (symlink)
index 0000000..b390d9a
--- /dev/null
+++ b/config/rootfiles/core/93/filelists/pcre
@@ -0,0 +1 @@
+../../../common/pcre
\ No newline at end of file

diff --git a/lfs/pcre b/lfs/pcre
index 175afc09e246b06db8cb96cd16403eedfb15235d..8f207da7ba59f7259c857919319a9cb9f4d4054c 100644 (file)
--- a/lfs/pcre
+++ b/lfs/pcre
@@ -70,6 +70,8 @@ $(subst %,%_MD5,$(objects)) :
 $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
        @$(PREBUILD)
        @rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar axf $(DIR_DL)/$(DL_FILE)
+       cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/pcre-8.37-Fix-buffer-overflow-for-named-recursive-back-referen.patch
+       cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/pcre-8.37-Fix-buffer-overflow-for-forward-reference-within-bac.patch
        cd $(DIR_APP) && ./configure \
                --prefix=/usr \
                --disable-static \

diff --git a/src/patches/pcre-8.37-Fix-buffer-overflow-for-forward-reference-within-bac.patch b/src/patches/pcre-8.37-Fix-buffer-overflow-for-forward-reference-within-bac.patch
new file mode 100644 (file)
index 0000000..16fd45c
--- /dev/null
+++ b/src/patches/pcre-8.37-Fix-buffer-overflow-for-forward-reference-within-bac.patch
@@ -0,0 +1,68 @@
+From 354e1f8e921dcb9cf2f3a5eac93cd826d01a7d8a Mon Sep 17 00:00:00 2001
+From: ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15>
+Date: Tue, 23 Jun 2015 16:34:53 +0000
+Subject: [PATCH] Fix buffer overflow for forward reference within backward
+ assertion with excess closing parenthesis. Bugzilla 1651.
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This is upstream commit ported to 8.37:
+
+commit 764692f9aea9eab50fdba6cb537441d8b34c6c37
+Author: ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15>
+Date:   Tue Jun 23 16:34:53 2015 +0000
+
+    Fix buffer overflow for forward reference within backward assertion with excess
+    closing parenthesis. Bugzilla 1651.
+
+    git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1571 2f5784b3-3f2a-0410-8824-cb99058d5e15
+
+It fixes CVE-2015-5073.
+
+Signed-off-by: Petr Písař <ppisar@redhat.com>
+---
+ pcre_compile.c       | 2 +-
+ testdata/testinput2  | 2 ++
+ testdata/testoutput2 | 3 +++
+ 3 files changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/pcre_compile.c b/pcre_compile.c
+index 6f06912..b66b1f6 100644
+--- a/pcre_compile.c
++++ b/pcre_compile.c
+@@ -9392,7 +9392,7 @@ OP_RECURSE that are not fixed length get a diagnosic with a useful offset. The
+ exceptional ones forgo this. We scan the pattern to check that they are fixed
+ length, and set their lengths. */
+ 
+-if (cd->check_lookbehind)
++if (errorcode == 0 && cd->check_lookbehind)
+   {
+   pcre_uchar *cc = (pcre_uchar *)codestart;
+ 
+diff --git a/testdata/testinput2 b/testdata/testinput2
+index 83bb471..5cc9ce6 100644
+--- a/testdata/testinput2
++++ b/testdata/testinput2
+@@ -4154,4 +4154,6 @@ backtracking verbs. --/
+ 
+ "(?J)(?'d'(?'d'\g{d}))"
+ 
++/(?=di(?<=(?1))|(?=(.))))/
++
+ /-- End of testinput2 --/
+diff --git a/testdata/testoutput2 b/testdata/testoutput2
+index 7dff52a..4decb8d 100644
+--- a/testdata/testoutput2
++++ b/testdata/testoutput2
+@@ -14425,4 +14425,7 @@ Failed: lookbehind assertion is not fixed length at offset 17
+ 
+ "(?J)(?'d'(?'d'\g{d}))"
+ 
++/(?=di(?<=(?1))|(?=(.))))/
++Failed: unmatched parentheses at offset 23
++
+ /-- End of testinput2 --/
+-- 
+2.4.3
+

diff --git a/src/patches/pcre-8.37-Fix-buffer-overflow-for-named-recursive-back-referen.patch b/src/patches/pcre-8.37-Fix-buffer-overflow-for-named-recursive-back-referen.patch
new file mode 100644 (file)
index 0000000..c97849f
--- /dev/null
+++ b/src/patches/pcre-8.37-Fix-buffer-overflow-for-named-recursive-back-referen.patch
@@ -0,0 +1,87 @@
+From 68ff1beb43bb3d4d8838f3285c97023d1e50513a Mon Sep 17 00:00:00 2001
+From: ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15>
+Date: Fri, 15 May 2015 17:17:03 +0000
+Subject: [PATCH] Fix buffer overflow for named recursive back reference when
+ the name is duplicated.
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Upstream commit ported to pcre-8.37:
+
+commit 4b79af6b4cbeb5326ae5e4d83f3e935e00286c19
+Author: ph10 <ph10@2f5784b3-3f2a-0410-8824-cb99058d5e15>
+Date:   Fri May 15 17:17:03 2015 +0000
+
+    Fix buffer overflow for named recursive back reference when the name is
+    duplicated.
+
+    git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1558 2f5784b3-3f2a-0410-8824-cb99058d5e15
+
+This fixes CVE-2015-3210.
+
+Signed-off-by: Petr Písař <ppisar@redhat.com>
+---
+ pcre_compile.c       | 16 ++++++++++++++--
+ testdata/testinput2  |  2 ++
+ testdata/testoutput2 |  2 ++
+ 3 files changed, 18 insertions(+), 2 deletions(-)
+
+diff --git a/pcre_compile.c b/pcre_compile.c
+index 0efad26..6f06912 100644
+--- a/pcre_compile.c
++++ b/pcre_compile.c
+@@ -7173,14 +7173,26 @@ for (;; ptr++)
+           number. If the name is not found, set the value to 0 for a forward
+           reference. */
+ 
++          recno = 0;
+           ng = cd->named_groups;
+           for (i = 0; i < cd->names_found; i++, ng++)
+             {
+             if (namelen == ng->length &&
+                 STRNCMP_UC_UC(name, ng->name, namelen) == 0)
+-              break;
++              {
++              open_capitem *oc;
++              recno = ng->number;
++              if (is_recurse) break;
++              for (oc = cd->open_caps; oc != NULL; oc = oc->next)         
++                {          
++                if (oc->number == recno)                                     
++                  {               
++                  oc->flag = TRUE;                                      
++                  break;
++                  }                                                         
++                }                          
++              }    
+             }
+-          recno = (i < cd->names_found)? ng->number : 0;
+ 
+           /* Count named back references. */
+ 
+diff --git a/testdata/testinput2 b/testdata/testinput2
+index 58fe53b..83bb471 100644
+--- a/testdata/testinput2
++++ b/testdata/testinput2
+@@ -4152,4 +4152,6 @@ backtracking verbs. --/
+ 
+ /((?2){73}(?2))((?1))/
+ 
++"(?J)(?'d'(?'d'\g{d}))"
++
+ /-- End of testinput2 --/
+diff --git a/testdata/testoutput2 b/testdata/testoutput2
+index b718df0..7dff52a 100644
+--- a/testdata/testoutput2
++++ b/testdata/testoutput2
+@@ -14423,4 +14423,6 @@ Failed: lookbehind assertion is not fixed length at offset 17
+ 
+ /((?2){73}(?2))((?1))/
+ 
++"(?J)(?'d'(?'d'\g{d}))"
++
+ /-- End of testinput2 --/
+-- 
+2.4.3
+