openldap: 2.4.49 → 2.4.50

Fixes: CVE-2020-12243

In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters
with nested boolean expressions can result in denial of service
(daemon crash).

pkgs/development/libraries/openldap/default.nix

@@ -1,11 +1,11 @@
 { stdenv, fetchurl, openssl, cyrus_sasl, db, groff, libtool }:
 
 stdenv.mkDerivation rec {
-  name = "openldap-2.4.49";
+  name = "openldap-2.4.50";
 
   src = fetchurl {
     url = "https://www.openldap.org/software/download/OpenLDAP/openldap-release/${name}.tgz";
-    sha256 = "0vp524rsngdcykf6ki7vprsyg7gj8z7hszg8xwxz50219fa1gcg3";
+    sha256 = "1f46nlfwmys110j36sifm7ah8m8f3s10c3vaiikmmigmifapvdaw";
   };
 
   # TODO: separate "out" and "bin"