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Amazon Linux AMI : nss-softokn (ALAS-2024-1907)

medium Nessus Plugin ID 189392

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Synopsis

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

Description

The version of nss-softokn installed on the remote host is prior to 3.53.1-6.49. It is, therefore, affected by a vulnerability as referenced in the ALAS-2024-1907 advisory.

 It was discovered that the numerical library used in NSS for RSA cryptography leaks information whether high order bits of the RSA decryption result are zero. This information can be used to mount a Bleichenbacher or Manger like attack against all RSA decryption operations. As the leak happens before any padding operations, it affects all padding modes: PKCS#1 v1.5, OAEP, and RSASVP. Both API level calls and TLS server operation are affected. (CVE-2023-5388)

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 nss-softokn' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2024-1907.html

https://alas.aws.amazon.com/cve/html/CVE-2023-5388.html

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

Plugin Details

Severity: Medium

ID: 189392

File Name: ala_ALAS-2024-1907.nasl

Version: 1.2

Type: local

Agent: unix

Published: 1/23/2024

Updated: 12/11/2024

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

Risk Information

VPR

Risk Factor: Low

Score: 2.5

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2023-5388

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:N/A:L

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:nss-softokn, p-cpe:/a:amazon:linux:nss-softokn-devel, p-cpe:/a:amazon:linux:nss-softokn-freebl, p-cpe:/a:amazon:linux:nss-softokn-freebl-devel, cpe:/o:amazon:linux, p-cpe:/a:amazon:linux:nss-softokn-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: 1/19/2024

Vulnerability Publication Date: 1/19/2024

Reference Information

CVE: CVE-2023-5388