Detections
Analytics
Amazon Linux 2 : openssl11 (ALAS-2025-2781)
medium Nessus Plugin ID 232356
Synopsis
The remote Amazon Linux 2 host is missing a security update.Description
The version of openssl11 installed on the remote host is prior to 1.1.1zb-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-2781 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 openssl11' to update your system.See Also
https://alas.aws.amazon.com/faqs.html
Plugin Details
Severity: Medium
ID: 232356
File Name: al2_ALAS-2025-2781.nasl
Version: 1.1
Type: local
Agent: unix
Published: 3/10/2025
Updated: 3/10/2025
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.2
CVSS v2
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/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:openssl11, p-cpe:/a:amazon:linux:openssl11-debuginfo, p-cpe:/a:amazon:linux:openssl11-devel, p-cpe:/a:amazon:linux:openssl11-static, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:openssl11-libs
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 2/26/2025
Vulnerability Publication Date: 1/20/2025
Reference Information
CVE: CVE-2024-13176
IAVA: 2025-A-0127