From 09eed842f79b122109501c570f4c5ca865756eba Mon Sep 17 00:00:00 2001 From: Ralph Boehme Date: Thu, 15 Feb 2018 14:40:59 +0100 Subject: CVE-2018-1057: s4:dsdb/password_hash: add a helper variable for passwordAttr->num_values Bug: https://bugzilla.samba.org/show_bug.cgi?id=13272 Signed-off-by: Ralph Boehme Reviewed-by: Stefan Metzmacher --- source4/dsdb/samdb/ldb_modules/password_hash.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/source4/dsdb/samdb/ldb_modules/password_hash.c b/source4/dsdb/samdb/ldb_modules/password_hash.c index bc1ef03db9d..1e7081b997a 100644 --- a/source4/dsdb/samdb/ldb_modules/password_hash.c +++ b/source4/dsdb/samdb/ldb_modules/password_hash.c @@ -3922,6 +3922,7 @@ static int password_hash_modify(struct ldb_module *module, struct ldb_request *r while ((passwordAttr = ldb_msg_find_element(msg, *l)) != NULL) { unsigned int mtype = LDB_FLAG_MOD_TYPE(passwordAttr->flags); + unsigned int nvalues = passwordAttr->num_values; if (mtype == LDB_FLAG_MOD_DELETE) { ++del_attr_cnt; @@ -3932,18 +3933,14 @@ static int password_hash_modify(struct ldb_module *module, struct ldb_request *r if (mtype == LDB_FLAG_MOD_REPLACE) { ++rep_attr_cnt; } - if ((passwordAttr->num_values != 1) && - (mtype == LDB_FLAG_MOD_ADD)) - { + if ((nvalues != 1) && (mtype == LDB_FLAG_MOD_ADD)) { talloc_free(ac); ldb_asprintf_errstring(ldb, "'%s' attribute must have exactly one value on add operations!", *l); return LDB_ERR_CONSTRAINT_VIOLATION; } - if ((passwordAttr->num_values > 1) && - (mtype == LDB_FLAG_MOD_DELETE)) - { + if ((nvalues > 1) && (mtype == LDB_FLAG_MOD_DELETE)) { talloc_free(ac); ldb_asprintf_errstring(ldb, "'%s' attribute must have zero or one value(s) on delete operations!", -- cgit v1.2.1