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CentOS 8 : libgcrypt (CESA-2021:4409)

high Nessus Plugin ID 155057

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Synopsis

The remote CentOS host is missing a security update.

Description

The remote CentOS Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CESA-2021:4409 advisory.

 - libgcrypt: mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm (CVE-2021-33560)

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 libgcrypt and / or libgcrypt-devel packages.

See Also

https://access.redhat.com/errata/RHSA-2021:4409

Plugin Details

Severity: High

ID: 155057

File Name: centos8_RHSA-2021-4409.nasl

Version: 1.2

Type: local

Agent: unix

Published: 11/11/2021

Updated: 11/11/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2021-33560

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:centos:centos:8-stream, p-cpe:/a:centos:centos:libgcrypt-devel, p-cpe:/a:centos:centos:libgcrypt

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/9/2021

Vulnerability Publication Date: 6/8/2021

Reference Information

CVE: CVE-2021-33560

RHSA: 2021:4409