Ubuntu 18.04 LTS : Linux kernel vulnerability (USN-4031-1)

high Nessus Plugin ID 126241

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 18.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-4031-1 advisory.

- arch/powerpc/mm/mmu_context_book3s64.c in the Linux kernel before 5.1.15 for powerpc has a bug where unrelated processes may be able to read/write to one another's virtual memory under certain conditions via an mmap above 512 TB. Only a subset of powerpc systems are affected. (CVE-2019-12817)

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 kernel package.

See Also

https://ubuntu.com/security/notices/USN-4031-1

Plugin Details

Severity: High

ID: 126241

File Name: ubuntu_USN-4031-1.nasl

Version: 1.9

Type: local

Agent: unix

Published: 6/25/2019

Updated: 1/9/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.1

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

CVSS Score Source: CVE-2019-12817

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

Vector: CVSS:3.0/AV:L/AC:H/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:canonical:ubuntu_linux:linux-image-4.18.0-24-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-24-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-24-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-24-snapdragon, cpe:/o:canonical:ubuntu_linux:18.04:-:lts

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 6/24/2019

Vulnerability Publication Date: 6/25/2019

Reference Information

CVE: CVE-2019-12817

USN: 4031-1