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Amazon Linux 2023 : gnupg2, gnupg2-minimal, gnupg2-smime (ALAS2023-2025-1107)

low Nessus Plugin ID 243460

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Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2025-1107 advisory.

 In GnuPG before 2.5.5, if a user chooses to import a certificate with certain crafted subkey data that lacks a valid backsig or that has incorrect usage flags, the user loses the ability to verify signatures made from certain other signing keys, aka a verification DoS.

 Exploitation of this vulnerability requires the customer to manually import a crafted certificate containing fingerprints that will then be used to verify signatures. Considering the tradeoff between the stability of Amazon Linux and the exploitation complexity of CVE-2025-30258, a fix will not be provided for gnupg2 in Amazon Linux 2 at this time. Users are advised to mitigate this issue by not importing suspicious GPG certificates and deleting any malicious keys from their keyrings. (CVE-2025-30258)

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 'dnf update gnupg2 --releasever 2023.8.20250721' to update your system.

See Also

https://alas.aws.amazon.com//AL2023/ALAS2023-2025-1107.html

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

https://explore.alas.aws.amazon.com/CVE-2025-30258.html

Plugin Details

Severity: Low

ID: 243460

File Name: al2023_ALAS2023-2025-1107.nasl

Version: 1.1

Type: local

Agent: unix

Published: 8/4/2025

Updated: 8/4/2025

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

Risk Information

VPR

Risk Factor: Low

Score: 1.6

CVSS v2

Risk Factor: Low

Base Score: 1.2

Temporal Score: 0.9

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

CVSS Score Source: CVE-2025-30258

CVSS v3

Risk Factor: Low

Base Score: 2.7

Temporal Score: 2.4

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

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

Vulnerability Information

CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:gnupg2-minimal, p-cpe:/a:amazon:linux:gnupg2-smime, p-cpe:/a:amazon:linux:gnupg2-minimal-debuginfo, p-cpe:/a:amazon:linux:gnupg2-debugsource, p-cpe:/a:amazon:linux:gnupg2, p-cpe:/a:amazon:linux:gnupg2-debuginfo, p-cpe:/a:amazon:linux:gnupg2-smime-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: 8/4/2025

Vulnerability Publication Date: 3/19/2025

Reference Information

CVE: CVE-2025-30258