initial buildroot for linux 5.15

package/libkrb5/0001-Fix-KDC-null-deref-on-TGS-inner-body-null-server.patch

@@ -0,0 +1,47 @@
+From d775c95af7606a51bf79547a94fa52ddd1cb7f49 Mon Sep 17 00:00:00 2001
+From: Greg Hudson <ghudson@mit.edu>
+Date: Tue, 3 Aug 2021 01:15:27 -0400
+Subject: [PATCH] Fix KDC null deref on TGS inner body null server
+
+After the KDC decodes a FAST inner body, it does not check for a null
+server.  Prior to commit 39548a5b17bbda9eeb63625a201cfd19b9de1c5b this
+would typically result in an error from krb5_unparse_name(), but with
+the addition of get_local_tgt() it results in a null dereference.  Add
+a null check.
+
+Reported by Joseph Sutton of Catalyst.
+
+CVE-2021-37750:
+
+In MIT krb5 releases 1.14 and later, an authenticated attacker can
+cause a null dereference in the KDC by sending a FAST TGS request with
+no server field.
+
+ticket: 9008 (new)
+tags: pullup
+target_version: 1.19-next
+target_version: 1.18-next
+
+[Retrieved from:
+https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ src/kdc/do_tgs_req.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/src/kdc/do_tgs_req.c b/src/kdc/do_tgs_req.c
+index 582e497cc9..32dc65fa8e 100644
+--- a/src/kdc/do_tgs_req.c
++++ b/src/kdc/do_tgs_req.c
+@@ -204,6 +204,11 @@ process_tgs_req(krb5_kdc_req *request, krb5_data *pkt,
+         status = "FIND_FAST";
+         goto cleanup;
+     }
++    if (sprinc == NULL) {
++        status = "NULL_SERVER";
++        errcode = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
++        goto cleanup;
++    }
+ 
+     errcode = get_local_tgt(kdc_context, &sprinc->realm, header_server,
+                             &local_tgt, &local_tgt_storage, &local_tgt_key);

package/libkrb5/Config.in

@@ -0,0 +1,21 @@
+config BR2_PACKAGE_LIBKRB5
+	bool "libkrb5"
+	# needs fork()
+	depends on BR2_USE_MMU
+	depends on !BR2_STATIC_LIBS
+	select BR2_PACKAGE_LIBOPENSSL_ENABLE_DES if BR2_PACKAGE_LIBOPENSSL
+	select BR2_PACKAGE_LIBOPENSSL_ENABLE_MD4 if BR2_PACKAGE_LIBOPENSSL
+	select BR2_PACKAGE_LIBOPENSSL_ENABLE_RC4 if BR2_PACKAGE_LIBOPENSSL
+	help
+	  Kerberos is a system for authenticating users and services
+	  on a network. Kerberos is a trusted third-party service.
+	  That means that there is a third party (the Kerberos server)
+	  that is trusted by all the entities on the network (users
+	  and services, usually called "principals"). This is the MIT
+	  reference implementation of Kerberos V5.
+
+	  https://web.mit.edu/kerberos/
+
+comment "libkrb5 needs a toolchain w/ dynamic library"
+	depends on BR2_USE_MMU
+	depends on BR2_STATIC_LIBS

package/libkrb5/libkrb5.hash

@@ -0,0 +1,5 @@
+# Locally calculated after checking pgp signature
+sha256  66085e2f594751e77e82e0dbf7bbc344320fb48a9df2a633cfdd8f7d6da99fc8  krb5-1.18.4.tar.gz
+
+# Hash for license file:
+sha256  7fba8b076bdc2cfef1d0813c5d4067d76d5be60c32d84de22d5d1cf451744feb  NOTICE

package/libkrb5/libkrb5.mk

@@ -0,0 +1,80 @@
+################################################################################
+#
+# libkrb5
+#
+################################################################################
+
+LIBKRB5_VERSION_MAJOR = 1.18
+LIBKRB5_VERSION = $(LIBKRB5_VERSION_MAJOR).4
+LIBKRB5_SITE = https://web.mit.edu/kerberos/dist/krb5/$(LIBKRB5_VERSION_MAJOR)
+LIBKRB5_SOURCE = krb5-$(LIBKRB5_VERSION).tar.gz
+LIBKRB5_SUBDIR = src
+LIBKRB5_LICENSE = MIT
+LIBKRB5_LICENSE_FILES = NOTICE
+LIBKRB5_CPE_ID_VENDOR = mit
+LIBKRB5_CPE_ID_PRODUCT = kerberos_5
+LIBKRB5_DEPENDENCIES = host-bison $(TARGET_NLS_DEPENDENCIES)
+LIBKRB5_INSTALL_STAGING = YES
+
+# 0001-Fix-KDC-null-deref-on-TGS-inner-body-null-server.patch
+LIBKRB5_IGNORE_CVES += CVE-2021-37750
+
+# The configure script uses AC_TRY_RUN tests to check for those values,
+# which doesn't work in a cross-compilation scenario. Therefore,
+# we feed the configure script with the correct answer for those tests
+LIBKRB5_CONF_ENV = \
+	ac_cv_printf_positional=yes \
+	ac_cv_func_regcomp=yes \
+	krb5_cv_attr_constructor_destructor=yes,yes \
+	LIBS=$(TARGET_NLS_LIBS)
+
+# Never use the host packages
+LIBKRB5_CONF_OPTS = \
+	--without-system-db \
+	--without-system-et \
+	--without-system-ss \
+	--without-system-verto \
+	--without-tcl \
+	--disable-rpath
+
+ifeq ($(BR2_PACKAGE_OPENLDAP),y)
+LIBKRB5_CONF_OPTS += --with-ldap
+LIBKRB5_DEPENDENCIES += openldap
+else
+LIBKRB5_CONF_OPTS += --without-ldap
+endif
+
+ifeq ($(BR2_PACKAGE_OPENSSL),y)
+LIBKRB5_CONF_OPTS += \
+	--enable-pkinit \
+	--with-crypto-impl=openssl \
+	--with-spake-openssl \
+	--with-tls-impl=openssl
+LIBKRB5_DEPENDENCIES += openssl
+else
+LIBKRB5_CONF_OPTS += \
+	--disable-pkinit \
+	--with-crypto-impl=builtin \
+	--without-spake-openssl \
+	--without-tls-impl
+endif
+
+ifeq ($(BR2_PACKAGE_LIBEDIT),y)
+LIBKRB5_CONF_OPTS += --with-libedit
+LIBKRB5_DEPENDENCIES += host-pkgconf libedit
+else
+LIBKRB5_CONF_OPTS += --without-libedit
+endif
+
+ifeq ($(BR2_PACKAGE_READLINE),y)
+LIBKRB5_CONF_OPTS += --with-readline
+LIBKRB5_DEPENDENCIES += readline
+else
+LIBKRB5_CONF_OPTS += --without-readline
+endif
+
+ifneq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
+LIBKRB5_CONF_OPTS += --disable-thread-support
+endif
+
+$(eval $(autotools-package))