Detections
Analytics
Amazon Linux 2 : ipa (ALAS-2026-3950)
high Nessus Plugin ID 351067
Language:
Synopsis
The remote Amazon Linux 2 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3950 advisory.A flaw was found in FreeIPA. An unauthenticated remote attacker could exploit a DOM Cross-Site Scripting (XSS) vulnerability in the FreeIPA/IdM Web UI password reset page. By enticing a victim to click a specially crafted link and complete a password reset, the attacker could inject and execute arbitrary JavaScript code. This allows the attacker to perform actions within the victim's authenticated session, potentially leading to full administrative control if an IdM administrator is targeted. (CVE-2026-18147)
A flaw was found in FreeIPA. The trust-fetch-domains command is gated by a read-only permission on the trust object rather than a trust-administration permission, allowing an authenticated, non-privileged IPA user to trigger a privileged Active Directory trust refresh using an attacker-supplied server and credentials, resulting in unauthorized, attacker-controlled modification of trusted-domain and ID-range identity data in the IPA LDAP directory. (CVE-2026-19550)
A flaw was found in FreeIPA. A remote, unauthenticated attacker can exploit this vulnerability by sending oversized form POST requests to the `/ipa/migration/migration.py` endpoint. This can force the migration handler to read attacker-controlled request bodies fully into memory, leading to increased memory usage, slower request handling, and potential service disruption or denial of service. (CVE-2026-73197)
Tenable has extracted the preceding description block directly from the tested product security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Run 'yum update ipa' or or 'yum update --advisory ALAS2-2026-3950' to update your system.See Also
https://alas.aws.amazon.com//AL2/ALAS2-2026-3950.html
https://alas.aws.amazon.com/faqs.html
https://explore.alas.aws.amazon.com/CVE-2026-18147.html
Plugin Details
Severity: High
ID: 351067
File Name: al2_ALAS-2026-3950.nasl
Version: 1.2
Type: Local
Agent: unix
Published: 9/29/2026
Updated: 10/19/2026
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.8
Percentile: 57.96
CVSS v2
Risk Factor: High
Base Score: 9.4
Temporal Score: 7
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N
CVSS Score Source: CVE-2026-18147
CVSS v3
Risk Factor: High
Base Score: 8.2
Temporal Score: 7.1
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS Score Source: CVE-2026-19550
Vulnerability Information
CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:ipa-client-common, p-cpe:/a:amazon:linux:ipa-client, p-cpe:/a:amazon:linux:ipa-common, p-cpe:/a:amazon:linux:ipa-debuginfo, p-cpe:/a:amazon:linux:ipa-python-compat, p-cpe:/a:amazon:linux:ipa-server-common, p-cpe:/a:amazon:linux:ipa-server-dns, p-cpe:/a:amazon:linux:ipa-server-trust-ad, p-cpe:/a:amazon:linux:ipa-server, p-cpe:/a:amazon:linux:python2-ipaclient, p-cpe:/a:amazon:linux:python2-ipalib, p-cpe:/a:amazon:linux:python2-ipaserver
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 9/28/2026
Vulnerability Publication Date: 8/20/2026