SUSE SLES15 / openSUSE 15 Security Update : samba (SUSE-SU-2023:1683-1)

medium Nessus Plugin ID 173686

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Synopsis

The remote SUSE host is missing a security update.

Description

The remote SUSE Linux SLES15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:1683-1 advisory.

 - Active Directory allows passwords to be set and changed over LDAP. Microsoft's implementation imposes a restriction that this may only happen over an encrypted connection, however Samba does not have this restriction currently. Samba's samba-tool client tool likewise has no restriction regarding the security of the connection it will set a password over. An attacker able to observe the network traffic between samba-tool and the Samba AD DC could obtain newly set passwords if samba-tool connected using a Kerberos secured LDAP connection against a Samba AD DC. This would happen when samba-tool was used to reset a user's password, or to add a new user. This only impacts connections made using Kerberos as NTLM-protected connections are upgraded to encryption regardless. This patch changes all Samba AD LDAP client connections to use encryption, as well as integrity protection, by default, by changing the default value of client ldap sasl wrapping to seal in Samba's smb.conf. Administrators should confirm this value has not been overridden in their local smb.conf to obtain the benefit of this change. NOTE WELL: Samba, for consistency, uses a common smb.conf option for LDAP client behaviour. Therefore this will also encrypt the AD LDAP connections between Samba's winbindd and any AD DC, so this patch will also change behaviour for Samba Domain Member configurations. If this is a concern, the smb.conf value client ldap sasl wrapping can be reset to sign. (CVE-2023-0922)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://bugzilla.suse.com/1209481

https://www.suse.com/security/cve/CVE-2023-0922

https://lists.suse.com/pipermail/sle-updates/2023-March/028466.html

Plugin Details

Severity: Medium

ID: 173686

File Name: suse_SU-2023-1683-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 3/30/2023

Updated: 4/10/2023

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2023-0922

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:ctdb, p-cpe:/a:novell:suse_linux:libdcerpc-binding0, p-cpe:/a:novell:suse_linux:libdcerpc-binding0-32bit, p-cpe:/a:novell:suse_linux:libdcerpc-devel, p-cpe:/a:novell:suse_linux:libdcerpc-samr-devel, p-cpe:/a:novell:suse_linux:libdcerpc-samr0, p-cpe:/a:novell:suse_linux:libdcerpc0, p-cpe:/a:novell:suse_linux:libdcerpc0-32bit, p-cpe:/a:novell:suse_linux:libndr-devel, p-cpe:/a:novell:suse_linux:libndr-krb5pac-devel, p-cpe:/a:novell:suse_linux:libndr-krb5pac0, p-cpe:/a:novell:suse_linux:libndr-krb5pac0-32bit, p-cpe:/a:novell:suse_linux:libndr-nbt-devel, p-cpe:/a:novell:suse_linux:libndr-nbt0, p-cpe:/a:novell:suse_linux:libndr-nbt0-32bit, p-cpe:/a:novell:suse_linux:libndr-standard-devel, p-cpe:/a:novell:suse_linux:libndr-standard0, p-cpe:/a:novell:suse_linux:libndr-standard0-32bit, p-cpe:/a:novell:suse_linux:libndr0, p-cpe:/a:novell:suse_linux:libndr0-32bit, p-cpe:/a:novell:suse_linux:libnetapi-devel, p-cpe:/a:novell:suse_linux:libnetapi0, p-cpe:/a:novell:suse_linux:libnetapi0-32bit, p-cpe:/a:novell:suse_linux:libsamba-credentials-devel, p-cpe:/a:novell:suse_linux:libsamba-credentials0, p-cpe:/a:novell:suse_linux:libsamba-credentials0-32bit, p-cpe:/a:novell:suse_linux:libsamba-errors-devel, p-cpe:/a:novell:suse_linux:libsamba-errors0, p-cpe:/a:novell:suse_linux:libsamba-errors0-32bit, p-cpe:/a:novell:suse_linux:libsamba-hostconfig-devel, p-cpe:/a:novell:suse_linux:libsamba-hostconfig0, p-cpe:/a:novell:suse_linux:libsamba-hostconfig0-32bit, p-cpe:/a:novell:suse_linux:libsamba-passdb-devel, p-cpe:/a:novell:suse_linux:libsamba-passdb0, p-cpe:/a:novell:suse_linux:libsamba-passdb0-32bit, p-cpe:/a:novell:suse_linux:libsamba-policy-devel, p-cpe:/a:novell:suse_linux:libsamba-policy-python3-devel, p-cpe:/a:novell:suse_linux:libsamba-policy0, p-cpe:/a:novell:suse_linux:libsamba-policy0-python3, p-cpe:/a:novell:suse_linux:libsamba-util-devel, p-cpe:/a:novell:suse_linux:libsamba-util0, p-cpe:/a:novell:suse_linux:libsamba-util0-32bit, p-cpe:/a:novell:suse_linux:libsamdb-devel, p-cpe:/a:novell:suse_linux:libsamdb0, p-cpe:/a:novell:suse_linux:libsamdb0-32bit, p-cpe:/a:novell:suse_linux:libsmbclient-devel, p-cpe:/a:novell:suse_linux:libsmbclient0, p-cpe:/a:novell:suse_linux:libsmbconf-devel, p-cpe:/a:novell:suse_linux:libsmbconf0, p-cpe:/a:novell:suse_linux:libsmbconf0-32bit, p-cpe:/a:novell:suse_linux:libsmbldap-devel, p-cpe:/a:novell:suse_linux:libsmbldap2, p-cpe:/a:novell:suse_linux:libsmbldap2-32bit, p-cpe:/a:novell:suse_linux:libtevent-util-devel, p-cpe:/a:novell:suse_linux:libtevent-util0, p-cpe:/a:novell:suse_linux:libtevent-util0-32bit, p-cpe:/a:novell:suse_linux:libwbclient-devel, p-cpe:/a:novell:suse_linux:libwbclient0, p-cpe:/a:novell:suse_linux:libwbclient0-32bit, p-cpe:/a:novell:suse_linux:samba, p-cpe:/a:novell:suse_linux:samba-ad-dc, p-cpe:/a:novell:suse_linux:samba-client, p-cpe:/a:novell:suse_linux:samba-core-devel, p-cpe:/a:novell:suse_linux:samba-dsdb-modules, p-cpe:/a:novell:suse_linux:samba-libs, p-cpe:/a:novell:suse_linux:samba-libs-32bit, p-cpe:/a:novell:suse_linux:samba-libs-python, p-cpe:/a:novell:suse_linux:samba-libs-python3, p-cpe:/a:novell:suse_linux:samba-python, p-cpe:/a:novell:suse_linux:samba-python3, p-cpe:/a:novell:suse_linux:samba-winbind, p-cpe:/a:novell:suse_linux:samba-winbind-32bit, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 3/29/2023

Vulnerability Publication Date: 3/29/2023

Reference Information

CVE: CVE-2023-0922

SuSE: SUSE-SU-2023:1683-1

IAVA: 2023-A-0167