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Amazon Linux 2 : containerd, --advisory ALAS2DOCKER-2025-093 (ALASDOCKER-2025-093)

medium Nessus Plugin ID 281797

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Synopsis

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

Description

The version of containerd installed on the remote host is prior to 2.1.5-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2DOCKER-2025-093 advisory.

 SSH Agent servers do not validate the size of messages when processing new identity requests, which may cause the program to panic if the message is malformed due to an out of bounds read. (CVE-2025-47914)

 SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption. (CVE-2025-58181)

 crypto/x509: excluded subdomain constraint does not restrict wildcard SANs

 An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com. (CVE-2025-61727)

 Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certificate provided by a malicious actor can result in excessive resource consumption. (CVE-2025-61729)

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 containerd' or or 'yum update --advisory ALAS2DOCKER-2025-093' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2DOCKER-2025-093.html

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

https://explore.alas.aws.amazon.com/CVE-2025-47914.html

https://explore.alas.aws.amazon.com/CVE-2025-58181.html

https://explore.alas.aws.amazon.com/CVE-2025-61727.html

https://explore.alas.aws.amazon.com/CVE-2025-61729.html

Plugin Details

Severity: Medium

ID: 281797

File Name: al2_ALASDOCKER-2025-093.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/5/2026

Updated: 1/5/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2025-61727

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:containerd-stress, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:containerd, p-cpe:/a:amazon:linux:containerd-debuginfo

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/5/2026

Vulnerability Publication Date: 11/19/2025

Reference Information

CVE: CVE-2025-47914, CVE-2025-58181, CVE-2025-61727, CVE-2025-61729

IAVB: 2025-B-0194