postgres.git / summary / log / commit / refs

commit    ed6deeb7a0dd9a8636309d0d8f6033db9fcc55ab
Author:   Noah Misch <noah@leadboat.com>
Date:     Sat Feb 06 01:22:51 2016 +0000

    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).


 src/backend/utils/misc/guc.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 406e859ca2d..14d016d29a7 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -7076,6 +7076,17 @@ init_custom_variable(const char *name,
 		!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);
 


[parent: 31b792f61448]