CentOS 7 : kernel (CESA-2021:3327)

high Nessus Plugin ID 152970

Synopsis

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

Description

The remote CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2021:3327 advisory.

- kernel: powerpc: RTAS calls can be used to compromise kernel integrity (CVE-2020-27777)

- kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)

- kernel: Local privilege escalation due to incorrect BPF JIT branch displacement computation (CVE-2021-29154)

- kernel: lack a full memory barrier upon the assignment of a new table value in net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h may lead to DoS (CVE-2021-29650)

- kernel: race condition for removal of the HCI controller (CVE-2021-32399)

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

http://www.nessus.org/u?f7c44f94

https://cwe.mitre.org/data/definitions/119.html

https://cwe.mitre.org/data/definitions/362.html

https://cwe.mitre.org/data/definitions/662.html

https://cwe.mitre.org/data/definitions/667.html

https://cwe.mitre.org/data/definitions/787.html

https://cwe.mitre.org/data/definitions/862.html

Plugin Details

Severity: High

ID: 152970

File Name: centos_RHSA-2021-3327.nasl

Version: 1.4

Type: local

Agent: unix

Published: 9/2/2021

Updated: 10/7/2021

Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure

Risk Information

CVSS Score Source: CVE-2021-29154

VPR

Risk Factor: Critical

Score: 9.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: E:H/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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

Temporal Vector: E:H/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:bpftool, p-cpe:/a:centos:centos:kernel, p-cpe:/a:centos:centos:kernel-abi-whitelists, p-cpe:/a:centos:centos:kernel-debug, p-cpe:/a:centos:centos:kernel-debug-devel, p-cpe:/a:centos:centos:kernel-devel, p-cpe:/a:centos:centos:kernel-headers, p-cpe:/a:centos:centos:kernel-tools, p-cpe:/a:centos:centos:kernel-tools-libs, p-cpe:/a:centos:centos:kernel-tools-libs-devel, p-cpe:/a:centos:centos:perf, p-cpe:/a:centos:centos:python-perf, cpe:/o:centos:centos:7

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/31/2021

Vulnerability Publication Date: 12/10/2020

Exploitable With

Metasploit (Netfilter x_tables Heap OOB Write Privilege Escalation)

Reference Information

CVE: CVE-2020-27777, CVE-2021-22555, CVE-2021-29154, CVE-2021-29650, CVE-2021-32399

RHSA: 2021:3327

CWE: 119, 362, 662, 667, 787, 862