Amazon Linux 2 : edk2 (ALAS-2025-2750)

medium Nessus Plugin ID 214984

Synopsis

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

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-2750 advisory.

Issue summary: A timing side-channel which could potentially allow recoveringthe private key exists in the ECDSA signature computation.

Impact summary: A timing side-channel in ECDSA signature computationscould allow recovering the private key by an attacker. However, measuringthe timing would require either local access to the signing application ora very fast network connection with low latency.

There is a timing signal of around 300 nanoseconds when the top word ofthe inverted ECDSA nonce value is zero. This can happen with significantprobability only for some of the supported elliptic curves. In particularthe NIST P-521 curve is affected. To be able to measure this leak, the attackerprocess must either be located in the same physical computer or musthave a very fast network connection with low latency. For that reasonthe severity of this vulnerability is Low. (CVE-2024-13176)

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 edk2' to update your system.

Plugin Details

Severity: Medium

ID: 214984

File Name: al2_ALAS-2025-2750.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 2/4/2025

Updated: 2/4/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

CVSS v2

Risk Factor: Low

Base Score: 1.9

Temporal Score: 1.4

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

CVSS Score Source: CVE-2024-13176

CVSS v3

Risk Factor: Medium

Base Score: 4.1

Temporal Score: 3.6

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:edk2-tools-doc, p-cpe:/a:amazon:linux:edk2-ovmf, p-cpe:/a:amazon:linux:edk2-tools, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:edk2-debuginfo, p-cpe:/a:amazon:linux:edk2-aarch64

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/30/2025

Vulnerability Publication Date: 1/20/2025

Reference Information

CVE: CVE-2024-13176

Detections

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