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Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-3901-1)

medium Nessus Plugin ID 122646

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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-3901-1 advisory.

 Jann Horn discovered that the userfaultd implementation in the Linux kernel did not properly restrict access to certain ioctls. A local attacker could use this possibly to modify files. (CVE-2018-18397)

 It was discovered that the crypto subsystem of the Linux kernel leaked uninitialized memory to user space in some situations. A local attacker could use this to expose sensitive information (kernel memory).
 (CVE-2018-19854)

 Jann Horn discovered a race condition in the fork() system call in the Linux kernel. A local attacker could use this to gain access to services that cache authorizations. (CVE-2019-6133)

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-3901-1

Plugin Details

Severity: Medium

ID: 122646

File Name: ubuntu_USN-3901-1.nasl

Version: 1.9

Type: local

Agent: unix

Published: 3/6/2019

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: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.4

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

CVSS Score Source: CVE-2019-6133

CVSS v3

Risk Factor: Medium

Base Score: 6.7

Temporal Score: 6

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1032-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1034-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1030-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-46-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1028-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-46-snapdragon, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-46-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1033-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1009-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-46-generic-lpae

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/5/2019

Vulnerability Publication Date: 12/4/2018

Reference Information

CVE: CVE-2018-18397, CVE-2018-19854, CVE-2019-6133

USN: 3901-1