Detections
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Oracle Linux 7 : Unbreakable Enterprise kernel (ELSA-2021-9222)

high Nessus Plugin ID 149421

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Synopsis

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

Description

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-9222 advisory.

 - bpf, x86: Validate computation of branch displacements for x86-64 (Piotr Krysiuk) [Orabug: 32759961] {CVE-2021-29154}
 - ext4: handle error of ext4_setup_system_zone() on remount (Jan Kara) [Orabug: 32656590] {CVE-2021-3428}
 - btrfs: fix race when cloning extent buffer during rewind of an old root (Filipe Manana) [Orabug:
 32669453] {CVE-2021-28964}
 - perf/x86/intel: Fix a crash caused by zero PEBS status (Kan Liang) [Orabug: 32669472] {CVE-2021-28971}
 - xen-blkback: don't leak persistent grants from xen_blkbk_map() (Jan Beulich) [Orabug: 32697854] {CVE-2021-28688}
 - bpf: Add sanity check for upper ptr_limit (Piotr Krysiuk) [Orabug: 32656764] {CVE-2020-27170} {CVE-2020-27171}
 - bpf: Simplify alu_limit masking for pointer arithmetic (Piotr Krysiuk) [Orabug: 32656764] {CVE-2020-27170} {CVE-2020-27171}
 - bpf: Prohibit alu ops for pointer types not defining ptr_limit (Piotr Krysiuk) [Orabug: 32656764] {CVE-2020-27170} {CVE-2020-27171}
 - netfilter: x_tables: Use correct memory barriers. (Mark Tomlinson) [Orabug: 32709123] {CVE-2021-29650}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://linux.oracle.com/errata/ELSA-2021-9222.html

Plugin Details

Severity: High

ID: 149421

File Name: oraclelinux_ELSA-2021-9222.nasl

Version: 1.5

Type: local

Agent: unix

Published: 5/12/2021

Updated: 11/1/2024

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2021-29154

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:oracle:linux:kernel-uek-headers, p-cpe:/a:oracle:linux:kernel-uek-debug-devel, p-cpe:/a:oracle:linux:perf, p-cpe:/a:oracle:linux:kernel-uek-devel, cpe:/o:oracle:linux:7, p-cpe:/a:oracle:linux:kernel-uek-tools-libs-devel, p-cpe:/a:oracle:linux:kernel-uek-doc, p-cpe:/a:oracle:linux:python-perf, p-cpe:/a:oracle:linux:kernel-uek-tools, p-cpe:/a:oracle:linux:kernel-uek-tools-libs, p-cpe:/a:oracle:linux:kernel-uek, p-cpe:/a:oracle:linux:kernel-uek-debug

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/OracleLinux

Exploit Ease: No known exploits are available

Patch Publication Date: 5/10/2021

Vulnerability Publication Date: 3/20/2021

Reference Information

CVE: CVE-2020-27170, CVE-2020-27171, CVE-2021-28688, CVE-2021-28964, CVE-2021-28971, CVE-2021-29154, CVE-2021-29650, CVE-2021-3428