RHEL 8 : samba (RHSA-2021:3724)

medium Nessus Plugin ID 153887
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 Red Hat host is missing a security update.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:3724 advisory.

- samba: Negative idmap cache entries can cause incorrect group entries in the Samba file server process token (CVE-2021-20254)

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://cwe.mitre.org/data/definitions/125.html

https://access.redhat.com/security/cve/CVE-2021-20254

https://bugzilla.redhat.com/1949442

https://access.redhat.com/errata/RHSA-2021:3724

Plugin Details

Severity: Medium

ID: 153887

File Name: redhat-RHSA-2021-3724.nasl

Version: 1.2

Type: local

Agent: unix

Published: 10/5/2021

Updated: 10/5/2021

Dependencies: ssh_get_info.nasl, redhat_repos.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: CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:N

Temporal Vector: CVSS2#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: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:2.3:o:redhat:enterprise_linux:8:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-client:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-common:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:libsmbclient:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:libsmbclient-devel:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-winbind:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-winbind-clients:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-winbind-krb5-locator:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:ctdb:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:libwbclient:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:libwbclient-devel:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-client-libs:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-common-libs:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-common-tools:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-devel:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-libs:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-pidl:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-vfs-glusterfs:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-winbind-modules:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:samba-krb5-printing:*:*:*:*:*:*:*, p-cpe:2.3:a:redhat:enterprise_linux:python3-samba:*:*:*:*:*:*:*

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/5/2021

Vulnerability Publication Date: 4/29/2021

Reference Information

CVE: CVE-2021-20254

CWE: 125

IAVA: 2021-A-0208

RHSA: 2021:3724