Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-3741-1)

medium Nessus Plugin ID 111751

Synopsis

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

Description

The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3741-1 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)

- Linux kernel versions 4.9+ can be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet which can lead to a denial of service. (CVE-2018-5390)

- 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-3741-1

Plugin Details

Severity: Medium

ID: 111751

File Name: ubuntu_USN-3741-1.nasl

Version: 1.14

Type: local

Agent: unix

Published: 8/15/2018

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: 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-4.4.0-1031-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1065-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1094-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1098-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-133-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-133-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-133-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-133-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-133-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-133-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-133-powerpc64-smp, cpe:/o:canonical:ubuntu_linux:16.04:-: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: 8/14/2018

Vulnerability Publication Date: 8/6/2018

Reference Information

CVE: CVE-2018-3620, CVE-2018-3646, CVE-2018-5390, CVE-2018-5391

USN: 3741-1