From 63de509875b5c3426d288a1aad73e5a67bd345f4 Mon Sep 17 00:00:00 2001 From: Douglas Bagnall Date: Wed, 20 Oct 2021 17:16:34 +1300 Subject: [PATCH] CVE-2020-25722 s4/dsdb/samldb: samldb_pwd_last_set_change() checks all values BUG: https://bugzilla.samba.org/show_bug.cgi?id=14876 Signed-off-by: Douglas Bagnall Reviewed-by: Andrew Bartlett --- 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 1410e5bc5e6..8e93df221f5 100644 --- a/source4/dsdb/samdb/ldb_modules/samldb.c +++ b/source4/dsdb/samdb/ldb_modules/samldb.c @@ -3102,8 +3102,15 @@ static int samldb_pwd_last_set_change(struct samldb_ctx *ac) NULL }; - el = dsdb_get_single_valued_attr(ac->msg, "pwdLastSet", - ac->req->operation); + ret = dsdb_get_expected_new_values(ac, + ac->msg, + "pwdLastSet", + &el, + ac->req->operation); + if (ret != LDB_SUCCESS) { + return ret; + } + if (el == NULL || el->num_values == 0) { ldb_asprintf_errstring(ldb, "%08X: samldb: 'pwdLastSet' can't be deleted!", -- 2.47.2