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Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-3740-1)

medium Nessus Plugin ID 111749

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3740-1 advisory.

 - Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access via a terminal page fault and a side-channel analysis. (CVE-2018-3620)

 - Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access with guest OS privilege via a terminal page fault and a side-channel analysis. (CVE-2018-3646)

 - The Linux kernel, versions 3.9+, is vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation have been discovered and fixed over the years. The current vulnerability (CVE-2018-5391) became exploitable in the Linux kernel with the increase of the IP fragment reassembly queue size. (CVE-2018-5391)

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 kernel package.

See Also

https://ubuntu.com/security/notices/USN-3740-1

Plugin Details

Severity: Medium

ID: 111749

File Name: ubuntu_USN-3740-1.nasl

Version: 1.15

Type: local

Agent: unix

Published: 8/15/2018

Updated: 1/9/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 3.5

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

CVSS Score Source: CVE-2018-3646

CVSS v3

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.9

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1015-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1017-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1019-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1019-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1020-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1021-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-32-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-32-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-32-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-32-snapdragon, cpe:/o:canonical:ubuntu_linux:18.04:-:lts

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/14/2018

Vulnerability Publication Date: 8/14/2018

Reference Information

CVE: CVE-2018-3620, CVE-2018-3646, CVE-2018-5391

USN: 3740-1