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samba/backport-0006-CVE-2018-14628.patch
xh f06d993486 fix CVE-2018-14628
2023-12-28 16:45:03 +08:00

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From c0c380a017eb465b41105d1ea84da92c8edfe8e3 Mon Sep 17 00:00:00 2001
From: Stefan Metzmacher <metze@samba.org>
Date: Fri, 29 Jan 2016 23:35:31 +0100
Subject: [PATCH 6/6] CVE-2018-14628: python:descriptor: let samba-tool dbcheck
fix the nTSecurityDescriptor on CN=Deleted Objects containers
BUG: https://bugzilla.samba.org/show_bug.cgi?id=13595
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 97e4aab1a6e2feda7c6c6fdeaa7c3e1818c55566)
Conflict: remove selftest file
source4/selftest/provisions/release-4-5-0-pre1/rootdse-version.final.txt
source4/selftest/provisions/release-4-5-0-pre1/expected-links-after-dbcheck.ldif
source4/selftest/provisions/release-4-5-0-pre1/expected-dbcheck-link-output-missing-link-sid-corruption.txt
Reference: https://attachments.samba.org/attachment.cgi?id=18168
[PATCH 6/6] CVE-2018-14628: python:descriptor: let samba-tool dbcheck
fix the nTSecurityDescriptor on CN=Deleted Objects containers
---
python/samba/dbchecker.py | 10 ++++++++--
python/samba/descriptor.py | 15 ++++++++++++++-
...ck-link-output-missing-link-sid-corruption.txt | 8 ++++----
.../expected-links-after-dbcheck.ldif | 2 +-
.../release-4-5-0-pre1/rootdse-version.final.txt | 2 +-
testprogs/blackbox/dbcheck-links.sh | 12 ++++++++++++
6 files changed, 40 insertions(+), 9 deletions(-)
diff --git a/python/samba/dbchecker.py b/python/samba/dbchecker.py
index e124b1a0d671..28d99c01d044 100644
--- a/python/samba/dbchecker.py
+++ b/python/samba/dbchecker.py
@@ -2444,7 +2444,7 @@ newSuperior: %s""" % (str(from_dn), str(to_rdn), str(to_base)))
error_count += 1
continue
- if self.reset_well_known_acls:
+ if dn == deleted_objects_dn or self.reset_well_known_acls:
try:
well_known_sd = self.get_wellknown_sd(dn)
except KeyError:
@@ -2453,7 +2453,13 @@ newSuperior: %s""" % (str(from_dn), str(to_rdn), str(to_base)))
current_sd = ndr_unpack(security.descriptor,
obj[attrname][0])
- diff = get_diff_sds(well_known_sd, current_sd, security.dom_sid(self.samdb.get_domain_sid()))
+ ignoreAdditionalACEs = False
+ if not self.reset_well_known_acls:
+ ignoreAdditionalACEs = True
+
+ diff = get_diff_sds(well_known_sd, current_sd,
+ security.dom_sid(self.samdb.get_domain_sid()),
+ ignoreAdditionalACEs=ignoreAdditionalACEs)
if diff != "":
self.err_wrong_default_sd(dn, well_known_sd, diff)
error_count += 1
diff --git a/python/samba/descriptor.py b/python/samba/descriptor.py
index 08c7518f56ab..34877fa4814a 100644
--- a/python/samba/descriptor.py
+++ b/python/samba/descriptor.py
@@ -417,6 +417,7 @@ def get_wellknown_sds(samdb):
# Then subcontainers
subcontainers = [
(ldb.Dn(samdb, "%s" % str(samdb.domain_dn())), get_domain_descriptor),
+ (ldb.Dn(samdb, "CN=Deleted Objects,%s" % str(samdb.domain_dn())), get_deletedobjects_descriptor),
(ldb.Dn(samdb, "CN=LostAndFound,%s" % str(samdb.domain_dn())), get_domain_delete_protected2_descriptor),
(ldb.Dn(samdb, "CN=System,%s" % str(samdb.domain_dn())), get_domain_delete_protected1_descriptor),
(ldb.Dn(samdb, "CN=Infrastructure,%s" % str(samdb.domain_dn())), get_domain_infrastructure_descriptor),
@@ -427,6 +428,7 @@ def get_wellknown_sds(samdb):
(ldb.Dn(samdb, "CN=MicrosoftDNS,CN=System,%s" % str(samdb.domain_dn())), get_dns_domain_microsoft_dns_descriptor),
(ldb.Dn(samdb, "%s" % str(samdb.get_config_basedn())), get_config_descriptor),
+ (ldb.Dn(samdb, "CN=Deleted Objects,%s" % str(samdb.get_config_basedn())), get_deletedobjects_descriptor),
(ldb.Dn(samdb, "CN=NTDS Quotas,%s" % str(samdb.get_config_basedn())), get_config_ntds_quotas_descriptor),
(ldb.Dn(samdb, "CN=LostAndFoundConfig,%s" % str(samdb.get_config_basedn())), get_config_delete_protected1wd_descriptor),
(ldb.Dn(samdb, "CN=Services,%s" % str(samdb.get_config_basedn())), get_config_delete_protected1_descriptor),
@@ -451,6 +453,9 @@ def get_wellknown_sds(samdb):
if ldb.Dn(samdb, nc.decode('utf8')) == dnsforestdn:
c = (ldb.Dn(samdb, "%s" % str(dnsforestdn)), get_dns_partition_descriptor)
subcontainers.append(c)
+ c = (ldb.Dn(samdb, "CN=Deleted Objects,%s" % str(dnsforestdn)),
+ get_deletedobjects_descriptor)
+ subcontainers.append(c)
c = (ldb.Dn(samdb, "CN=Infrastructure,%s" % str(dnsforestdn)),
get_domain_delete_protected1_descriptor)
subcontainers.append(c)
@@ -466,6 +471,9 @@ def get_wellknown_sds(samdb):
if ldb.Dn(samdb, nc.decode('utf8')) == dnsdomaindn:
c = (ldb.Dn(samdb, "%s" % str(dnsdomaindn)), get_dns_partition_descriptor)
subcontainers.append(c)
+ c = (ldb.Dn(samdb, "CN=Deleted Objects,%s" % str(dnsdomaindn)),
+ get_deletedobjects_descriptor)
+ subcontainers.append(c)
c = (ldb.Dn(samdb, "CN=Infrastructure,%s" % str(dnsdomaindn)),
get_domain_delete_protected1_descriptor)
subcontainers.append(c)
@@ -558,7 +566,8 @@ def get_clean_sd(sd):
return sd_clean
-def get_diff_sds(refsd, cursd, domainsid, checkSacl=True):
+def get_diff_sds(refsd, cursd, domainsid, checkSacl=True,
+ ignoreAdditionalACEs=False):
"""Get the difference between 2 sd
This function split the textual representation of ACL into smaller
@@ -613,6 +622,10 @@ def get_diff_sds(refsd, cursd, domainsid, checkSacl=True):
h_ref.remove(k)
if len(h_cur) + len(h_ref) > 0:
+ if txt == "" and len(h_ref) == 0:
+ if ignoreAdditionalACEs:
+ return ""
+
txt = "%s\tPart %s is different between reference" \
" and current here is the detail:\n" % (txt, part)
diff --git a/testprogs/blackbox/dbcheck-links.sh b/testprogs/blackbox/dbcheck-links.sh
index 29fb5b85abcc..a91ed00fb0f7 100755
--- a/testprogs/blackbox/dbcheck-links.sh
+++ b/testprogs/blackbox/dbcheck-links.sh
@@ -59,6 +59,16 @@ dbcheck()
fi
}
+dbcheck_acl_reset()
+{
+ $PYTHON $BINDIR/samba-tool dbcheck -H tdb://$PREFIX_ABS/${RELEASE}/private/sam.ldb --cross-ncs --fix --yes --attrs=nTSecurityDescriptor
+}
+
+dbcheck_acl_clean()
+{
+ $PYTHON $BINDIR/samba-tool dbcheck -H tdb://$PREFIX_ABS/${RELEASE}/private/sam.ldb --cross-ncs --attrs=nTSecurityDescriptor
+}
+
dbcheck_dangling()
{
dbcheck "" "1" "--selftest-check-expired-tombstones"
@@ -925,6 +935,8 @@ EOF
remove_directory $PREFIX_ABS/${RELEASE}
testit $RELEASE undump || failed=$(expr $failed + 1)
+testit_expect_failure "dbcheck_acl_reset" dbcheck_acl_reset || failed=$(expr $failed + 1)
+testit "dbcheck_acl_clean" dbcheck_acl_clean || failed=$(expr $failed + 1)
testit "add_two_more_users" add_two_more_users || failed=$(expr $failed + 1)
testit "add_four_more_links" add_four_more_links || failed=$(expr $failed + 1)
testit "remove_one_link" remove_one_link || failed=$(expr $failed + 1)
--
2.34.1
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