Amazon Linux 2 : sssd (ALAS-2021-1715)

high Nessus Plugin ID 153899

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of sssd installed on the remote host is prior to 1.16.5-10. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2021-1715 advisory.

A flaw was found in SSSD, where the sssctl command was vulnerable to shell command injection via the logs- fetch and cache-expire subcommands. This flaw allows an attacker to trick the root user into running a specially crafted sssctl command, such as via sudo, to gain root access. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-3621)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

Solution

Run 'yum update sssd' to update your system.

Plugin Details

Severity: High

ID: 153899

File Name: al2_ALAS-2021-1715.nasl

Version: 1.5

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 10/6/2021

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

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

CVSS Score Source: CVE-2021-3621

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:sssd-krb5, p-cpe:/a:amazon:linux:python-libsss_nss_idmap, p-cpe:/a:amazon:linux:libsss_sudo, p-cpe:/a:amazon:linux:libsss_certmap, p-cpe:/a:amazon:linux:libsss_nss_idmap-devel, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:sssd-ad, p-cpe:/a:amazon:linux:libsss_idmap-devel, p-cpe:/a:amazon:linux:sssd-proxy, p-cpe:/a:amazon:linux:libsss_idmap, p-cpe:/a:amazon:linux:python-sss-murmur, p-cpe:/a:amazon:linux:sssd-dbus, p-cpe:/a:amazon:linux:sssd-common, p-cpe:/a:amazon:linux:sssd-libwbclient, p-cpe:/a:amazon:linux:sssd, p-cpe:/a:amazon:linux:sssd-ldap, p-cpe:/a:amazon:linux:python-sss, p-cpe:/a:amazon:linux:libipa_hbac-devel, p-cpe:/a:amazon:linux:sssd-winbind-idmap, p-cpe:/a:amazon:linux:python-sssdconfig, p-cpe:/a:amazon:linux:libsss_simpleifp-devel, p-cpe:/a:amazon:linux:sssd-debuginfo, p-cpe:/a:amazon:linux:sssd-common-pac, p-cpe:/a:amazon:linux:libsss_autofs, p-cpe:/a:amazon:linux:libsss_certmap-devel, p-cpe:/a:amazon:linux:sssd-ipa, p-cpe:/a:amazon:linux:sssd-kcm, p-cpe:/a:amazon:linux:sssd-client, p-cpe:/a:amazon:linux:sssd-krb5-common, p-cpe:/a:amazon:linux:sssd-tools, p-cpe:/a:amazon:linux:libsss_simpleifp, p-cpe:/a:amazon:linux:python-libipa_hbac, p-cpe:/a:amazon:linux:sssd-polkit-rules, p-cpe:/a:amazon:linux:libipa_hbac, p-cpe:/a:amazon:linux:sssd-libwbclient-devel, p-cpe:/a:amazon:linux:libsss_nss_idmap

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/4/2021

Vulnerability Publication Date: 8/16/2021

Reference Information

CVE: CVE-2021-3621

ALAS: 2021-1715

Detections

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