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SUSE SLED15 / SLES15 Security Update : samba (SUSE-SU-2022:0283-1)

high Nessus Plugin ID 157307

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Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLED15 / SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:0283-1 advisory.

 - A flaw was found in samba. Spaces used in a string around a domain name (DN), while supposed to be ignored, can cause invalid DN strings with spaces to instead write a zero-byte into out-of-bounds memory, resulting in a crash. The highest threat from this vulnerability is to system availability.
 (CVE-2020-27840)

 - A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to an out-of-bounds memory write, leading to a crash of the LDAP server process handling the request. The highest threat from this vulnerability is to system availability. (CVE-2021-20277)

 - A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of the share. (CVE-2021-20316)

 - ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation. (CVE-2021-36222)

 - All versions of Samba prior to 4.13.16 are vulnerable to a malicious client using an SMB1 or NFS race to allow a directory to be created in an area of the server file system not exported under the share definition. Note that SMB1 has to be enabled, or the share also available via NFS in order for this attack to succeed. (CVE-2021-43566)

 - All versions of Samba prior to 4.15.5 are vulnerable to a malicious client using a server symlink to determine if a file or directory exists in an area of the server file system not exported under the share definition. SMB1 with unix extensions has to be enabled in order for this attack to succeed.
 (CVE-2021-44141)

 - The Samba vfs_fruit module uses extended file attributes (EA, xattr) to provide ...enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver. Samba versions prior to 4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd, typically root. (CVE-2021-44142)

 - The Samba AD DC includes checks when adding service principals names (SPNs) to an account to ensure that SPNs do not alias with those already in the database. Some of these checks are able to be bypassed if an account modification re-adds an SPN that was previously present on that account, such as one added when a computer is joined to a domain. An attacker who has the ability to write to an account can exploit this to perform a denial-of-service attack by adding an SPN that matches an existing service. Additionally, an attacker who can intercept traffic can impersonate existing services, resulting in a loss of confidentiality and integrity. (CVE-2022-0336)

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

Solution

Update the affected packages.

See Also

https://bugzilla.suse.com/1139519

https://bugzilla.suse.com/1183572

https://bugzilla.suse.com/1183574

https://bugzilla.suse.com/1188571

https://bugzilla.suse.com/1191227

https://bugzilla.suse.com/1191532

https://bugzilla.suse.com/1192684

https://bugzilla.suse.com/1193690

https://bugzilla.suse.com/1194859

https://bugzilla.suse.com/1195048

https://www.suse.com/security/cve/CVE-2020-27840

https://www.suse.com/security/cve/CVE-2021-20277

https://www.suse.com/security/cve/CVE-2021-20316

https://www.suse.com/security/cve/CVE-2021-36222

https://www.suse.com/security/cve/CVE-2021-43566

https://www.suse.com/security/cve/CVE-2021-44141

https://www.suse.com/security/cve/CVE-2021-44142

https://www.suse.com/security/cve/CVE-2022-0336

http://www.nessus.org/u?105ef610

Plugin Details

Severity: High

ID: 157307

File Name: suse_SU-2022-0283-1.nasl

Version: 1.11

Type: local

Agent: unix

Published: 2/2/2022

Updated: 11/1/2023

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

Risk Information

VPR

Risk Factor: High

Score: 8.9

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 7.8

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

CVSS Score Source: CVE-2021-44142

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 8.4

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

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

CVSS Score Source: CVE-2022-0336

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:apache2-mod_apparmor, p-cpe:/a:novell:suse_linux:apparmor-abstractions, p-cpe:/a:novell:suse_linux:apparmor-docs, p-cpe:/a:novell:suse_linux:apparmor-parser, p-cpe:/a:novell:suse_linux:apparmor-parser-lang, p-cpe:/a:novell:suse_linux:apparmor-profiles, p-cpe:/a:novell:suse_linux:apparmor-utils, p-cpe:/a:novell:suse_linux:apparmor-utils-lang, p-cpe:/a:novell:suse_linux:ctdb, p-cpe:/a:novell:suse_linux:krb5, p-cpe:/a:novell:suse_linux:krb5-32bit, p-cpe:/a:novell:suse_linux:krb5-client, p-cpe:/a:novell:suse_linux:krb5-devel, p-cpe:/a:novell:suse_linux:krb5-plugin-kdb-ldap, p-cpe:/a:novell:suse_linux:krb5-plugin-preauth-otp, p-cpe:/a:novell:suse_linux:krb5-plugin-preauth-pkinit, p-cpe:/a:novell:suse_linux:krb5-plugin-preauth-spake, p-cpe:/a:novell:suse_linux:krb5-server, p-cpe:/a:novell:suse_linux:ldb-tools, p-cpe:/a:novell:suse_linux:libapparmor-devel, p-cpe:/a:novell:suse_linux:libapparmor1, p-cpe:/a:novell:suse_linux:libapparmor1-32bit, p-cpe:/a:novell:suse_linux:libipa_hbac-devel, p-cpe:/a:novell:suse_linux:libipa_hbac0, p-cpe:/a:novell:suse_linux:libldb-devel, p-cpe:/a:novell:suse_linux:libldb2, p-cpe:/a:novell:suse_linux:libldb2-32bit, 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-python3, p-cpe:/a:novell:suse_linux:libsss_certmap-devel, p-cpe:/a:novell:suse_linux:libsss_certmap0, p-cpe:/a:novell:suse_linux:libsss_idmap-devel, p-cpe:/a:novell:suse_linux:libsss_idmap0, p-cpe:/a:novell:suse_linux:libsss_nss_idmap-devel, p-cpe:/a:novell:suse_linux:libsss_nss_idmap0, p-cpe:/a:novell:suse_linux:libsss_simpleifp-devel, p-cpe:/a:novell:suse_linux:libsss_simpleifp0, p-cpe:/a:novell:suse_linux:libtalloc-devel, p-cpe:/a:novell:suse_linux:libtalloc2, p-cpe:/a:novell:suse_linux:libtalloc2-32bit, p-cpe:/a:novell:suse_linux:libtdb-devel, p-cpe:/a:novell:suse_linux:libtdb1, p-cpe:/a:novell:suse_linux:libtdb1-32bit, p-cpe:/a:novell:suse_linux:libtevent-devel, p-cpe:/a:novell:suse_linux:libtevent0, p-cpe:/a:novell:suse_linux:libtevent0-32bit, p-cpe:/a:novell:suse_linux:pam_apparmor, p-cpe:/a:novell:suse_linux:pam_apparmor-32bit, p-cpe:/a:novell:suse_linux:perl-apparmor, p-cpe:/a:novell:suse_linux:python3-apparmor, p-cpe:/a:novell:suse_linux:python3-ldb, p-cpe:/a:novell:suse_linux:python3-ldb-devel, p-cpe:/a:novell:suse_linux:python3-sssd-config, p-cpe:/a:novell:suse_linux:python3-talloc, p-cpe:/a:novell:suse_linux:python3-talloc-devel, p-cpe:/a:novell:suse_linux:python3-tdb, p-cpe:/a:novell:suse_linux:python3-tevent, p-cpe:/a:novell:suse_linux:samba, p-cpe:/a:novell:suse_linux:samba-ad-dc, p-cpe:/a:novell:suse_linux:samba-ad-dc-libs, p-cpe:/a:novell:suse_linux:samba-ad-dc-libs-32bit, p-cpe:/a:novell:suse_linux:samba-ceph, p-cpe:/a:novell:suse_linux:samba-client, p-cpe:/a:novell:suse_linux:samba-client-32bit, p-cpe:/a:novell:suse_linux:samba-client-libs, p-cpe:/a:novell:suse_linux:samba-client-libs-32bit, p-cpe:/a:novell:suse_linux:samba-devel, p-cpe:/a:novell:suse_linux:samba-devel-32bit, p-cpe:/a:novell:suse_linux:samba-dsdb-modules, p-cpe:/a:novell:suse_linux:samba-gpupdate, p-cpe:/a:novell:suse_linux:samba-ldb-ldap, 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-python3, p-cpe:/a:novell:suse_linux:samba-python3, p-cpe:/a:novell:suse_linux:samba-tool, p-cpe:/a:novell:suse_linux:samba-winbind, p-cpe:/a:novell:suse_linux:samba-winbind-libs, p-cpe:/a:novell:suse_linux:samba-winbind-libs-32bit, p-cpe:/a:novell:suse_linux:sssd, p-cpe:/a:novell:suse_linux:sssd-ad, p-cpe:/a:novell:suse_linux:sssd-common, p-cpe:/a:novell:suse_linux:sssd-dbus, p-cpe:/a:novell:suse_linux:sssd-ipa, p-cpe:/a:novell:suse_linux:sssd-krb5, p-cpe:/a:novell:suse_linux:sssd-krb5-common, p-cpe:/a:novell:suse_linux:sssd-ldap, p-cpe:/a:novell:suse_linux:sssd-proxy, p-cpe:/a:novell:suse_linux:sssd-tools, p-cpe:/a:novell:suse_linux:sssd-winbind-idmap, p-cpe:/a:novell:suse_linux:talloc-man, p-cpe:/a:novell:suse_linux:tdb-tools, p-cpe:/a:novell:suse_linux:tevent-man, cpe:/o:novell:suse_linux:15

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/8/2022

Vulnerability Publication Date: 3/24/2021

Reference Information

CVE: CVE-2020-27840, CVE-2021-20277, CVE-2021-20316, CVE-2021-36222, CVE-2021-43566, CVE-2021-44141, CVE-2021-44142, CVE-2022-0336

IAVA: 2021-A-0140-S, 2021-A-0487-S, 2022-A-0020-S, 2022-A-0054-S

IAVB: 2021-B-0054-S

SuSE: SUSE-SU-2022:0283-1