samba: fix CVE-2023-0922

The Samba AD DC administration tool, when operating against a remote LDAP server,
will by default send new or reset passwords over a signed-only connection.

References:
https://nvd.nist.gov/vuln/detail/CVE-2023-0922

Upstream patches:
https://github.com/samba-team/samba/commit/04e5a7eb03a

Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

2 files changed, 112 insertions, 0 deletions

diff --git a/meta-networking/recipes-connectivity/samba/samba/CVE-2023-0922.patch b/meta-networking/recipes-connectivity/samba/samba/CVE-2023-0922.patch
new file mode 100644
index 0000000000..b8cb06bee1
--- /dev/null
+++ b/meta-networking/recipes-connectivity/samba/samba/CVE-2023-0922.patch
@@ -0,0 +1,111 @@
+From 04e5a7eb03a1e913f34d77b7b6c2353b41ef546a Mon Sep 17 00:00:00 2001
+From: Rob van der Linde <rob@catalyst.net.nz>
+Date: Mon, 27 Feb 2023 14:06:23 +1300
+Subject: [PATCH] CVE-2023-0922 set default ldap client sasl wrapping to seal
+
+This avoids sending new or reset passwords in the clear
+(integrity protected only) from samba-tool in particular.
+
+BUG: https://bugzilla.samba.org/show_bug.cgi?id=15315
+
+Signed-off-by: Rob van der Linde <rob@catalyst.net.nz>
+Signed-off-by: Andrew Bartlett <abartlet@samba.org>
+Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
+
+CVE: CVE-2023-0922
+
+Upstream-Status: Backport [https://github.com/samba-team/samba/commit/04e5a7eb03a]
+
+Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
+---
+ .../ldap/clientldapsaslwrapping.xml           | 27 +++++++++----------
+ lib/param/loadparm.c                          |  2 +-
+ python/samba/tests/auth_log.py                |  2 +-
+ source3/param/loadparm.c                      |  2 +-
+ 4 files changed, 16 insertions(+), 17 deletions(-)
+
+diff --git a/docs-xml/smbdotconf/ldap/clientldapsaslwrapping.xml b/docs-xml/smbdotconf/ldap/clientldapsaslwrapping.xml
+index 3152f06..21bd209 100644
+--- a/docs-xml/smbdotconf/ldap/clientldapsaslwrapping.xml
++++ b/docs-xml/smbdotconf/ldap/clientldapsaslwrapping.xml
+@@ -18,25 +18,24 @@
+        </para>
+        
+        <para>
+-       This option is needed in the case of Domain Controllers enforcing 
+-       the usage of signed LDAP connections (e.g. Windows 2000 SP3 or higher).
+-       LDAP sign and seal can be controlled with the registry key
+-       "<literal>HKLM\System\CurrentControlSet\Services\</literal>
+-       <literal>NTDS\Parameters\LDAPServerIntegrity</literal>"
+-       on the Windows server side.  
+-       </para>
++       This option is needed firstly to secure the privacy of
++       administrative connections from <command>samba-tool</command>,
++       including in particular new or reset passwords for users. For
++       this reason the default is <emphasis>seal</emphasis>.</para>
+ 
+-       <para>
+-       Depending on the used KRB5 library (MIT and older Heimdal versions)
+-       it is possible that the message "integrity only" is not supported. 
+-       In this case, <emphasis>sign</emphasis> is just an alias for 
+-       <emphasis>seal</emphasis>.
++       <para>Additionally, <command>winbindd</command> and the
++       <command>net</command> tool can use LDAP to communicate with
++       Domain Controllers, so this option also controls the level of
++       privacy for those connections.  All supported AD DC versions
++       will enforce the usage of at least signed LDAP connections by
++       default, so a value of at least <emphasis>sign</emphasis> is
++       required in practice.
+        </para>
+ 
+        <para>
+-       The default value is <emphasis>sign</emphasis>. That implies synchronizing the time
++       The default value is <emphasis>seal</emphasis>. That implies synchronizing the time
+        with the KDC in the case of using <emphasis>Kerberos</emphasis>.
+        </para>
+ </description>
+-<value type="default">sign</value>
++<value type="default">seal</value>
+ </samba:parameter>
+diff --git a/lib/param/loadparm.c b/lib/param/loadparm.c
+index 75687f5..d260691 100644
+--- a/lib/param/loadparm.c
++++ b/lib/param/loadparm.c
+@@ -2970,7 +2970,7 @@ struct loadparm_context *loadparm_init(TALLOC_CTX *mem_ctx)
+ 
+        lpcfg_do_global_parameter(lp_ctx, "ldap debug threshold", "10");
+ 
+-       lpcfg_do_global_parameter(lp_ctx, "client ldap sasl wrapping", "sign");
++       lpcfg_do_global_parameter(lp_ctx, "client ldap sasl wrapping", "seal");
+ 
+        lpcfg_do_global_parameter(lp_ctx, "mdns name", "netbios");
+ 
+diff --git a/python/samba/tests/auth_log.py b/python/samba/tests/auth_log.py
+index 8ac76fe..d2db380 100644
+--- a/python/samba/tests/auth_log.py
++++ b/python/samba/tests/auth_log.py
+@@ -471,7 +471,7 @@ class AuthLogTests(samba.tests.auth_log_base.AuthLogTestBase):
+         def isLastExpectedMessage(msg):
+             return (msg["type"] == "Authorization" and
+                     msg["Authorization"]["serviceDescription"] == "LDAP" and
+-                    msg["Authorization"]["transportProtection"] == "SIGN" and
++                    msg["Authorization"]["transportProtection"] == "SEAL" and
+                     msg["Authorization"]["authType"] == "krb5")
+ 
+         self.samdb = SamDB(url="ldap://%s" % os.environ["SERVER"],
+diff --git a/source3/param/loadparm.c b/source3/param/loadparm.c
+index a99ab35..c47c5f6 100644
+--- a/source3/param/loadparm.c
++++ b/source3/param/loadparm.c
+@@ -754,7 +754,7 @@ static void init_globals(struct loadparm_context *lp_ctx, bool reinit_globals)
+        Globals.ldap_debug_level = 0;
+        Globals.ldap_debug_threshold = 10;
+ 
+-       Globals.client_ldap_sasl_wrapping = ADS_AUTH_SASL_SIGN;
++       Globals.client_ldap_sasl_wrapping = ADS_AUTH_SASL_SEAL;
+ 
+        Globals.ldap_server_require_strong_auth =
+                LDAP_SERVER_REQUIRE_STRONG_AUTH_YES;
+-- 
+2.40.0
+
diff --git a/meta-networking/recipes-connectivity/samba/samba_4.14.14.bb b/meta-networking/recipes-connectivity/samba/samba_4.14.14.bb
index 6838ac12f2..2fb93be0a9 100644
--- a/meta-networking/recipes-connectivity/samba/samba_4.14.14.bb
+++ b/meta-networking/recipes-connectivity/samba/samba_4.14.14.bb
@@ -58,6 +58,7 @@ SRC_URI = "${SAMBA_MIRROR}/stable/samba-${PV}.tar.gz \
            file://CVE-2018-14628-0004.patch \
            file://CVE-2018-14628-0005.patch \
            file://CVE-2018-14628-0006.patch \
+           file://CVE-2023-0922.patch \
            "
 
 SRC_URI:append:libc-musl = " \