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Azure Linux 3.0 Security Update: cloud-hypervisor-cvm / nodejs / nodejs18 / openssl (CVE-2023-6237)

medium Nessus Plugin ID 215789

Synopsis

The remote Azure Linux host is missing one or more security updates.

Description

The version of cloud-hypervisor-cvm / nodejs / nodejs18 / openssl installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2023-6237 advisory.

 - Issue summary: Checking excessively long invalid RSA public keys May take a long time. Impact summary:
 Applications that use the function EVP_PKEY_public_check() to check RSA public keys May experience long delays. Where the key that is being checked has been obtained from an untrusted source this May lead to a Denial of Service. When function EVP_PKEY_public_check() is called on RSA public keys, a computation is done to confirm that the RSA modulus, n, is composite. For valid RSA keys, n is a product of two or more large primes and this computation completes quickly. However, if n is an overly large prime, then this computation would take a long time. An application that calls EVP_PKEY_public_check() and supplies an RSA key obtained from an untrusted source could be vulnerable to a Denial of Service attack. The function EVP_PKEY_public_check() is not called from other OpenSSL functions however it is called from the OpenSSL pkey command line application. For that reason that application is also vulnerable if used with the '-pubin' and '-check' options on untrusted data. The OpenSSL SSL/TLS implementation is not affected by this issue. The OpenSSL 3.0 and 3.1 FIPS providers are affected by this issue. (CVE-2023-6237)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://nvd.nist.gov/vuln/detail/CVE-2023-6237

Plugin Details

Severity: Medium

ID: 215789

File Name: azure_linux_CVE-2023-6237.nasl

Version: 1.1

Type: local

Published: 2/10/2025

Updated: 2/10/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

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

CVSS Score Source: CVE-2023-6237

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: p-cpe:/a:microsoft:azure_linux:nodejs-devel, p-cpe:/a:microsoft:azure_linux:openssl, p-cpe:/a:microsoft:azure_linux:nodejs18-debuginfo, p-cpe:/a:microsoft:azure_linux:openssl-devel, x-cpe:/o:microsoft:azure_linux, p-cpe:/a:microsoft:azure_linux:nodejs, p-cpe:/a:microsoft:azure_linux:nodejs-npm, p-cpe:/a:microsoft:azure_linux:nodejs18, p-cpe:/a:microsoft:azure_linux:openssl-static, p-cpe:/a:microsoft:azure_linux:openssl-libs, p-cpe:/a:microsoft:azure_linux:nodejs18-devel, p-cpe:/a:microsoft:azure_linux:openssl-perl, p-cpe:/a:microsoft:azure_linux:cloud-hypervisor-cvm

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/10/2024

Vulnerability Publication Date: 1/9/2024

Reference Information

CVE: CVE-2023-6237

IAVA: 2024-A-0121-S