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Amazon Linux 2 : sssd, --advisory ALAS2-2025-3050 (ALAS-2025-3050)

high Nessus Plugin ID 271751

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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 1.16.5-11. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-3050 advisory.

 A flaw was found in the integration of Active Directory and the System Security Services Daemon (SSSD) on Linux systems. In default configurations, SSSD does not enable the Kerberos local authentication plugin (sssd_krb5_localauth_plugin), allowing an attacker with permission to modify certain AD attributes (such as userPrincipalName or samAccountName) to impersonate privileged users. This can result in unauthorized access or privilege escalation on domain-joined Linux hosts. (CVE-2025-11561)

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' or or 'yum update --advisory ALAS2-2025-3050' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2-2025-3050.html

https://alas.aws.amazon.com/faqs.html

https://explore.alas.aws.amazon.com/CVE-2025-11561.html

Plugin Details

Severity: High

ID: 271751

File Name: al2_ALAS-2025-3050.nasl

Version: 1.1

Type: local

Agent: unix

Published: 10/28/2025

Updated: 10/28/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2025-11561

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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: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: 10/27/2025

Vulnerability Publication Date: 10/9/2025

Reference Information

CVE: CVE-2025-11561