postgresql: Security Advisory-postgresql-CVE-2016-0766

add CVE-2016-0766 patch for avoiding attackers to gain privileges
via unspecified vectors.
Patch comes from:
http://git.postgresql.org/gitweb/?p=postgresql.git;a=summary
commit f4aa3a18a20d51575562520754aa376b3b08b2d0

Signed-off-by: Zhixiong Chi <Zhixiong.Chi@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

2 files changed, 36 insertions, 0 deletions

diff --git a/meta-oe/recipes-support/postgresql/files/postgresql-CVE-2016-0766.patch b/meta-oe/recipes-support/postgresql/files/postgresql-CVE-2016-0766.patch
new file mode 100644
index 000000000..df89eb0a1
--- /dev/null
+++ b/meta-oe/recipes-support/postgresql/files/postgresql-CVE-2016-0766.patch
@@ -0,0 +1,35 @@
+From f4aa3a18a20d51575562520754aa376b3b08b2d0 Mon Sep 17 00:00:00 2001
+From: Noah Misch <noah@leadboat.com>
+Date: Fri, 5 Feb 2016 20:22:51 -0500
+Subject: [PATCH] Force certain "pljava" custom GUCs to be PGC_SUSET.
+
+Future PL/Java versions will close CVE-2016-0766 by making these GUCs
+PGC_SUSET.  This PostgreSQL change independently mitigates that PL/Java
+vulnerability, helping sites that update PostgreSQL more frequently than
+PL/Java.  Back-patch to 9.1 (all supported versions).
+
+Upstream-Status: Backport
+
+Signed-off-by: Noah Misch <noah@leadboat.com>
+Index: postgresql-9.4.4/src/backend/utils/misc/guc.c
+===================================================================
+--- postgresql-9.4.4.orig/src/backend/utils/misc/guc.c  2015-06-10 03:29:38.000000000 +0800
++++ postgresql-9.4.4/src/backend/utils/misc/guc.c       2016-03-04 15:58:26.459266951 +0800
+@@ -7072,6 +7072,17 @@
+                !process_shared_preload_libraries_in_progress)
+                elog(FATAL, "cannot create PGC_POSTMASTER variables after startup");
+ 
++       /*
++        * Before pljava commit 398f3b876ed402bdaec8bc804f29e2be95c75139
++        * (2015-12-15), two of that module's PGC_USERSET variables facilitated
++        * trivial escalation to superuser privileges.  Restrict the variables to
++        * protect sites that have yet to upgrade pljava.
++        */
++       if (context == PGC_USERSET &&
++               (strcmp(name, "pljava.classpath") == 0 ||
++                strcmp(name, "pljava.vmoptions") == 0))
++               context = PGC_SUSET;
++
+        gen = (struct config_generic *) guc_malloc(ERROR, sz);
+        memset(gen, 0, sz);
+ 
diff --git a/meta-oe/recipes-support/postgresql/postgresql.inc b/meta-oe/recipes-support/postgresql/postgresql.inc
index dbc02a013..06e601fa6 100644
--- a/meta-oe/recipes-support/postgresql/postgresql.inc
+++ b/meta-oe/recipes-support/postgresql/postgresql.inc
@@ -31,6 +31,7 @@ SRC_URI = "http://ftp.postgresql.org/pub/source/v${PV}/${BP}.tar.bz2 \
     file://postgresql-setup \
     file://postgresql.service \
     file://0001-Use-pkg-config-for-libxml2-detection.patch \
+    file://postgresql-CVE-2016-0766.patch \
 "
 
 LEAD_SONAME = "libpq.so"