Detections
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Azure Linux 3.0 Security Update: c-ares / fluent-bit / grpc / nodejs (CVE-2023-31147)

medium Nessus Plugin ID 233335

Synopsis

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

Description

The version of c-ares / fluent-bit / grpc / nodejs 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-2023-31147 advisory.

 - c-ares is an asynchronous resolver library. When /dev/urandom or RtlGenRandom() are unavailable, c-ares uses rand() to generate random numbers used for DNS query ids. This is not a CSPRNG, and it is also not seeded by srand() so will generate predictable output. Input from the random number generator is fed into a non-compilant RC4 implementation and May not be as strong as the original RC4 implementation. No attempt is made to look for modern OS-provided CSPRNGs like arc4random() that is widely available. This issue has been fixed in version 1.19.1. (CVE-2023-31147)

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-2023-31147

Plugin Details

Severity: Medium

ID: 233335

File Name: azure_linux_CVE-2023-31147.nasl

Version: 1.1

Type: local

Published: 3/25/2025

Updated: 3/25/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.5

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2023-31147

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:L/A:N

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:fluent-bit, p-cpe:/a:microsoft:azure_linux:c-ares, p-cpe:/a:microsoft:azure_linux:grpc-plugins, p-cpe:/a:microsoft:azure_linux:nodejs-debuginfo, p-cpe:/a:microsoft:azure_linux:fluent-bit-debuginfo, p-cpe:/a:microsoft:azure_linux:nodejs, x-cpe:/o:microsoft:azure_linux, p-cpe:/a:microsoft:azure_linux:python3-grpcio, p-cpe:/a:microsoft:azure_linux:fluent-bit-devel, p-cpe:/a:microsoft:azure_linux:c-ares-devel, p-cpe:/a:microsoft:azure_linux:c-ares-debuginfo, p-cpe:/a:microsoft:azure_linux:grpc, p-cpe:/a:microsoft:azure_linux:grpc-devel

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/11/2025

Vulnerability Publication Date: 5/24/2023

Reference Information

CVE: CVE-2023-31147