SUSE SLED15 / SLES15 Security Update : samba (SUSE-SU-2021:3187-1)

medium Nessus Plugin ID 153580
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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-2021:3187-1 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. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity.
(CVE-2021-20254)

- 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)

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/1182830

https://bugzilla.suse.com/1183572

https://bugzilla.suse.com/1183574

https://bugzilla.suse.com/1184677

https://bugzilla.suse.com/1189875

http://www.nessus.org/u?f6e13d33

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

https://www.suse.com/security/cve/CVE-2021-20254

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

Plugin Details

Severity: Medium

ID: 153580

File Name: suse_SU-2021-3187-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 9/23/2021

Updated: 9/23/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2021-20254

VPR

Risk Factor: Medium

Score: 6

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

Vector: AV:N/AC:M/Au:S/C:P/I:P/A:N

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

Temporal Vector: 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:libndr1, p-cpe:/a:novell:suse_linux:libndr1-32bit, 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-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-ceph, 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-python3, 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: 9/22/2021

Vulnerability Publication Date: 3/24/2021

Reference Information

CVE: CVE-2020-27840, CVE-2021-20254, CVE-2021-20277

SuSE: SUSE-SU-2021:3187-1

IAVA: 2021-A-0140-S, 2021-A-0208