Detections
Analytics

AlmaLinux 8 : gnutls and nettle (ALSA-2021:4451)

critical Nessus Plugin ID 157640

Synopsis

The remote AlmaLinux host is missing one or more security updates.

Description

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2021:4451 advisory.

 - A flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service. (CVE-2021-3580)

 - A flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to memory corruption and other consequences. (CVE-2021-20231)

 - A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences. (CVE-2021-20232)

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://errata.almalinux.org/8/ALSA-2021-4451.html

Plugin Details

Severity: Critical

ID: 157640

File Name: alma_linux_ALSA-2021-4451.nasl

Version: 1.4

Type: local

Published: 2/9/2022

Updated: 11/10/2023

Supported Sensors: Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2021-20232

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

Vulnerability Information

CPE: p-cpe:/a:alma:linux:nettle, p-cpe:/a:alma:linux:gnutls-utils, p-cpe:/a:alma:linux:gnutls-c%2b%2b, p-cpe:/a:alma:linux:gnutls-dane, cpe:/o:alma:linux:8, p-cpe:/a:alma:linux:gnutls-devel, p-cpe:/a:alma:linux:gnutls, p-cpe:/a:alma:linux:nettle-devel

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/9/2021

Vulnerability Publication Date: 3/12/2021

Reference Information

CVE: CVE-2021-20231, CVE-2021-20232, CVE-2021-3580