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Amazon Linux 2 : aws-nitro-enclaves-cli, --advisory ALAS2NITRO-ENCLAVES-2026-115 (ALASNITRO-ENCLAVES-2026-115)

high Nessus Plugin ID 332056

Synopsis

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

Description

The version of aws-nitro-enclaves-cli installed on the remote host is prior to 1.4.5-0. It is, therefore, affected by a vulnerability as referenced in the ALAS2NITRO-ENCLAVES-2026-115 advisory.

 rust-openssl provides OpenSSL bindings for the Rust programming language. From 0.9.7 to before 0.10.79, X509Ref::ocsp_responders returns OCSP responder URLs from a certificate's AIA extension as OpensslString, whose Deref<Target = str> wraps the raw bytes with str::from_utf8_unchecked. OpenSSL does not enforce that the underlying IA5String is ASCII, so a certificate with non-UTF-8 bytes in its OCSP accessLocation causes safe Rust code to construct a &str that violates the UTF-8 invariant -- resulting in undefined behavior.
 This vulnerability is fixed in 0.10.79. (CVE-2026-42327)

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 aws-nitro-enclaves-cli' or or 'yum update --advisory ALAS2NITRO-ENCLAVES-2026-115' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2NITRO-ENCLAVES-2026-115.html

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

https://explore.alas.aws.amazon.com/CVE-2026-42327.html

Plugin Details

Severity: High

ID: 332056

File Name: al2_ALASNITRO-ENCLAVES-2026-115.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 8/4/2026

Updated: 8/4/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.77

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-42327

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:aws-nitro-enclaves-cli-debuginfo, p-cpe:/a:amazon:linux:aws-nitro-enclaves-cli-devel, p-cpe:/a:amazon:linux:aws-nitro-enclaves-cli-integration-tests, p-cpe:/a:amazon:linux:aws-nitro-enclaves-cli

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/4/2026

Vulnerability Publication Date: 5/5/2026

Reference Information

CVE: CVE-2026-42327