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!45 fix CVE-2021-3671

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From: @eaglegai
Reviewed-by: @zengwefeng
Signed-off-by: @zengwefeng
This commit is contained in:
openeuler-ci-bot 2021-10-26 02:17:51 +00:00 committed by Gitee
commit eaa49fc4f6
2 changed files with 47 additions and 1 deletions
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39
backport-CVE-2021-3671.patch Normal file
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@ -0,0 +1,39 @@
From 0cb4b939f192376bf5e33637863a91a20f74c5a5 Mon Sep 17 00:00:00 2001
From: Luke Howard <lukeh@padl.com>
Date: Fri, 27 Aug 2021 11:42:48 +1000
Subject: [PATCH] CVE-2021-3671 HEIMDAL kdc: validate sname in TGS-REQ
In tgs_build_reply(), validate the server name in the TGS-REQ is present before
dereferencing.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14770
[abartlet@samba.org backported from from Heimdal
commit 04171147948d0a3636bc6374181926f0fb2ec83a via reference
to an earlier patch by Joseph Sutton]
RN: An unuthenticated user can crash the AD DC KDC by omitting the server name in a TGS-REQ
Reviewed-by: Andreas Schneider <asn@samba.org>
---
source4/heimdal/kdc/krb5tgs.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/source4/heimdal/kdc/krb5tgs.c b/source4/heimdal/kdc/krb5tgs.c
index b76726cdd64..d143eb739eb 100644
--- a/source4/heimdal/kdc/krb5tgs.c
+++ b/source4/heimdal/kdc/krb5tgs.c
@@ -1603,6 +1603,10 @@ tgs_build_reply(krb5_context context,
s = &adtkt.cname;
r = adtkt.crealm;
+ } else if (s == NULL) {
+ ret = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
+ krb5_set_error_message(context, ret, "No server in request");
+ goto out;
}
_krb5_principalname2krb5_principal(context, &sp, *s, r);
--
GitLab

9
samba.spec
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@ -49,7 +49,7 @@
Name: samba
Version: 4.12.5
Release: 6
Release: 7
Summary: A suite for Linux to interoperate with Windows
License: GPLv3+ and LGPLv3+
@ -74,6 +74,7 @@ Patch4: CVE-2020-14323.patch
Patch5: CVE-2021-20277.patch
Patch6: CVE-2020-27840.patch
Patch7: CVE-2021-20254.patch
Patch8: backport-CVE-2021-3671.patch
BuildRequires: avahi-devel bison cups-devel dbus-devel docbook-style-xsl e2fsprogs-devel flex gawk gnupg2 gnutls-devel >= 3.4.7 gpgme-devel
BuildRequires: jansson-devel krb5-devel >= %{required_mit_krb5} libacl-devel libaio-devel libarchive-devel libattr-devel
@ -3208,6 +3209,12 @@ fi
%endif
%changelog
* Mon Oct 25 2021 gaihuiying <gaihuiying1@huawei.com> - 4.12.5-7
- Type:cves
- ID:CVE-2021-3671
- SUG:NA
- DESC:fix CVE-2021-3671
* Fri Sep 10 2021 gaihuiying <gaihuiying1@huawei.com> - 4.12.5-6
- Type:bugfix
- ID:NA