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Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel update (USN-4041-1)

high Nessus Plugin ID 126374

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-4041-1 advisory.

 - Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commits 967c05aee439e6e5d7d805e195b3a20ef5c433d6 and 5f3e2bf008c2221478101ee72f5cb4654b9fc363. (CVE-2019-11479)

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-4041-1

Plugin Details

Severity: High

ID: 126374

File Name: ubuntu_USN-4041-1.nasl

Version: 1.10

Type: local

Agent: unix

Published: 7/1/2019

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: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2019-11479

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1017-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1036-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1036-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1038-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1040-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1043-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1045-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1049-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1057-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-54-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-54-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-54-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-1023-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-25-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-25-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-25-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-25-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1051-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1087-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1114-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1118-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-154-powerpc64-smp, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, 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: 6/29/2019

Vulnerability Publication Date: 6/19/2019

Reference Information

CVE: CVE-2019-11479

USN: 4041-1