From 466620563bdbb31858e82462cdc0ae62605c9206 Mon Sep 17 00:00:00 2001 From: Douglas Bagnall Date: Wed, 20 Oct 2021 17:12:49 +1300 Subject: [PATCH 160/266] CVE-2020-25722 s4/dsdb/samldb: samldb_schema_add_handle_linkid() checks all values BUG: https://bugzilla.samba.org/show_bug.cgi?id=14876 Signed-off-by: Douglas Bagnall Reviewed-by: Andrew Bartlett Conflict:NA Reference:https://gitlab.com/samba-team/samba/-/commit/466620563bdbb31858e82462cdc0ae62605c9206 --- source4/dsdb/samdb/ldb_modules/samldb.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/source4/dsdb/samdb/ldb_modules/samldb.c b/source4/dsdb/samdb/ldb_modules/samldb.c index 5d3e0f9771c..39533266aeb 100644 --- a/source4/dsdb/samdb/ldb_modules/samldb.c +++ b/source4/dsdb/samdb/ldb_modules/samldb.c @@ -739,8 +739,15 @@ static int samldb_schema_add_handle_linkid(struct samldb_ctx *ac) schema = dsdb_get_schema(ldb, ac); schema_dn = ldb_get_schema_basedn(ldb); - el = dsdb_get_single_valued_attr(ac->msg, "linkID", - ac->req->operation); + ret = dsdb_get_expected_new_values(ac, + ac->msg, + "linkID", + &el, + ac->req->operation); + if (ret != LDB_SUCCESS) { + return ret; + } + if (el == NULL) { return LDB_SUCCESS; } -- 2.23.0