Detections
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Rocky Linux 8 : kernel (RLSA-2021:2570)

high Nessus Plugin ID 157825

Synopsis

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

Description

The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2021:2570 advisory.

 - The Linux kernel through 5.8.13 does not properly enforce the Secure Boot Forbidden Signature Database (aka dbx) protection mechanism. This affects certs/blacklist.c and certs/system_keyring.c.
 (CVE-2020-26541)

 - In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value. (CVE-2021-33034)

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.rockylinux.org/RLSA-2021:2570

https://bugzilla.redhat.com/show_bug.cgi?id=1886285

https://bugzilla.redhat.com/show_bug.cgi?id=1961305

Plugin Details

Severity: High

ID: 157825

File Name: rocky_linux_RLSA-2021-2570.nasl

Version: 1.6

Type: local

Published: 2/9/2022

Updated: 11/9/2023

Supported Sensors: Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.4

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

CVSS Score Source: CVE-2020-26541

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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

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

CVSS Score Source: CVE-2021-33034

Vulnerability Information

CPE: p-cpe:/a:rocky:linux:kernel-debug-modules, p-cpe:/a:rocky:linux:kernel-debug-core, p-cpe:/a:rocky:linux:kernel-cross-headers, p-cpe:/a:rocky:linux:kernel-debuginfo-common-aarch64, p-cpe:/a:rocky:linux:kernel-devel, p-cpe:/a:rocky:linux:python3-perf, p-cpe:/a:rocky:linux:kernel-debug-devel, p-cpe:/a:rocky:linux:kernel-debuginfo-common-x86_64, cpe:/o:rocky:linux:8, p-cpe:/a:rocky:linux:kernel, p-cpe:/a:rocky:linux:kernel-modules-extra, p-cpe:/a:rocky:linux:kernel-debug, p-cpe:/a:rocky:linux:python3-perf-debuginfo, p-cpe:/a:rocky:linux:kernel-tools-libs-devel, p-cpe:/a:rocky:linux:kernel-debug-modules-extra, p-cpe:/a:rocky:linux:bpftool, p-cpe:/a:rocky:linux:kernel-tools-libs, p-cpe:/a:rocky:linux:kernel-core, p-cpe:/a:rocky:linux:kernel-abi-stablelists, p-cpe:/a:rocky:linux:kernel-modules, p-cpe:/a:rocky:linux:kernel-tools, p-cpe:/a:rocky:linux:perf-debuginfo, p-cpe:/a:rocky:linux:kernel-debug-debuginfo, p-cpe:/a:rocky:linux:kernel-headers, p-cpe:/a:rocky:linux:kernel-tools-debuginfo, p-cpe:/a:rocky:linux:bpftool-debuginfo, p-cpe:/a:rocky:linux:perf, p-cpe:/a:rocky:linux:kernel-debuginfo

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/22/2021

Vulnerability Publication Date: 10/2/2020

Reference Information

CVE: CVE-2020-26541, CVE-2021-33034