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Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4017-1)

high Nessus Plugin ID 125998

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Synopsis

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

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4017-1 advisory.

 Jonathan Looney discovered that the TCP retransmission queue implementation in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service. (CVE-2019-11478)

 Jonathan Looney discovered that an integer overflow existed in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). A remote attacker could use this to cause a denial of service (system crash). (CVE-2019-11477)

Tenable has extracted the preceding description block directly from the Ubuntu 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 kernel package.

See Also

https://ubuntu.com/security/notices/USN-4017-1

Plugin Details

Severity: High

ID: 125998

File Name: ubuntu_USN-4017-1.nasl

Version: 1.13

Type: local

Agent: unix

Published: 6/18/2019

Updated: 8/27/2024

Supported Sensors: Agentless Assessment, Continuous 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: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2019-11477

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

CVSS Score Source: CVE-2019-11478

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-22-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-151-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-151-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-22-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1115-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1047-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-151-powerpc64-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-52-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-151-powerpc-smp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1038-raspi2, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1041-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-52-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1055-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1043-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1111-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1036-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-22-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-151-powerpc64-emb, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1015-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-1020-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1085-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1034-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-151-powerpc-e500mc, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-52-lowlatency, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.18.0-22-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-151-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1048-kvm

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/17/2019

Vulnerability Publication Date: 6/19/2019

Reference Information

CVE: CVE-2019-11477, CVE-2019-11478

USN: 4017-1