Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4254-1)

high Nessus Plugin ID 133293

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Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

It was discovered that the Linux kernel did not properly clear data structures on context switches for certain Intel graphics processors.
A local attacker could use this to expose sensitive information.
(CVE-2019-14615)

It was discovered that a race condition existed in the Virtual Video Test Driver in the Linux kernel. An attacker with write access to /dev/video0 on a system with the vivid module loaded could possibly use this to gain administrative privileges. (CVE-2019-18683)

It was discovered that the btrfs file system in the Linux kernel did not properly validate metadata, leading to a NULL pointer dereference.
An attacker could use this to specially craft a file system image that, when mounted, could cause a denial of service (system crash).
(CVE-2019-18885)

It was discovered that multiple memory leaks existed in the Marvell WiFi-Ex Driver for the Linux kernel. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion).
(CVE-2019-19057)

It was discovered that the crypto subsystem in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19062)

It was discovered that the Realtek rtlwifi USB device driver in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19063)

Dan Carpenter discovered that the AppleTalk networking subsystem of the Linux kernel did not properly handle certain error conditions, leading to a NULL pointer dereference. A local attacker could use this to cause a denial of service (system crash). (CVE-2019-19227)

It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly handle ioctl requests to get emulated CPUID features. An attacker with access to /dev/kvm could use this to cause a denial of service (system crash). (CVE-2019-19332)

It was discovered that the B2C2 FlexCop USB device driver in the Linux kernel did not properly validate device metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2019-15291).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected packages.

See Also

https://usn.ubuntu.com/4254-1/

Plugin Details

Severity: High

ID: 133293

File Name: ubuntu_USN-4254-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 1/28/2020

Updated: 9/17/2020

Dependencies: ssh_get_info.nasl, linux_alt_patch_detect.nasl

Risk Information

CVSS Score Source: CVE-2019-18683

VPR

Risk Factor: Critical

Score: 9

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.1

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.1

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual, cpe:/o:canonical:ubuntu_linux:16.04

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/28/2020

Vulnerability Publication Date: 8/20/2019

Reference Information

CVE: CVE-2019-14615, CVE-2019-15291, CVE-2019-18683, CVE-2019-18885, CVE-2019-19057, CVE-2019-19062, CVE-2019-19063, CVE-2019-19227, CVE-2019-19332

USN: 4254-1