Detections
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Azure Linux 3.0 Security Update: glibc (CVE-2023-4806)

medium Nessus Plugin ID 241922

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Synopsis

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

Description

The version of glibc 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-2023-4806 advisory.

 - A flaw was found in glibc. In an extremely rare situation, the getaddrinfo function May access memory that has been freed, resulting in an application crash. This issue is only exploitable when a NSS module implements only the _nss_*_gethostbyname2_r and _nss_*_getcanonname_r hooks without implementing the
 _nss_*_gethostbyname3_r hook. The resolved name should return a large number of IPv6 and IPv4, and the call to the getaddrinfo function should have the AF_INET6 address family with AI_CANONNAME, AI_ALL and AI_V4MAPPED as flags. (CVE-2023-4806)

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-2023-4806

Plugin Details

Severity: Medium

ID: 241922

File Name: azure_linux_CVE-2023-4806.nasl

Version: 1.1

Type: local

Published: 7/11/2025

Updated: 7/11/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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-2023-4806

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:glibc-nscd, p-cpe:/a:microsoft:azure_linux:glibc-tools, p-cpe:/a:microsoft:azure_linux:glibc, p-cpe:/a:microsoft:azure_linux:glibc-locales-all, p-cpe:/a:microsoft:azure_linux:glibc-lang, p-cpe:/a:microsoft:azure_linux:glibc-devel, x-cpe:/o:microsoft:azure_linux, p-cpe:/a:microsoft:azure_linux:glibc-i18n, p-cpe:/a:microsoft:azure_linux:glibc-static, p-cpe:/a:microsoft:azure_linux:glibc-iconv, p-cpe:/a:microsoft:azure_linux:glibc-debuginfo

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: 7/8/2025

Vulnerability Publication Date: 6/13/2023

Reference Information

CVE: CVE-2023-4806