Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4390-1)

medium Nessus Plugin ID 137300

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Synopsis

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

Description

It was discovered that the F2FS file system implementation in the Linux kernel did not properly perform bounds checking on xattrs in some situations. A local attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2020-0067)

It was discovered that memory contents previously stored in microarchitectural special registers after RDRAND, RDSEED, and SGX EGETKEY read operations on Intel client and Xeon E3 processors may be briefly exposed to processes on the same or different processor cores.
A local attacker could use this to expose sensitive information.
(CVE-2020-0543)

Piotr Krysiuk discovered that race conditions existed in the file system implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2020-12114)

It was discovered that the USB susbsystem's scatter-gather implementation in the Linux kernel did not properly take data references in some situations, leading to a use-after-free. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2020-12464)

Xiumei Mu discovered that the IPSec implementation in the Linux kernel did not properly encrypt IPv6 traffic in some situations. An attacker could use this to expose sensitive information. (CVE-2020-1749)

Dmitry Vyukov discovered that the SELinux netlink security hook in the Linux kernel did not validate messages in some situations. A privileged attacker could use this to bypass SELinux netlink restrictions. (CVE-2020-10751).

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/4390-1/

Plugin Details

Severity: Medium

ID: 137300

File Name: ubuntu_USN-4390-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 6/10/2020

Updated: 9/17/2020

Dependencies: ssh_get_info.nasl, linux_alt_patch_detect.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 6.7

Temporal Score: 5.8

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

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

Vulnerability Information

CPE: cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:*:*:*:*, cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:*:*:*:*, cpe:2.3:o:canonical:ubuntu_linux:18.04:-:lts:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-generic:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-lowlatency:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-kvm:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-generic-lpae:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-4.15-aws:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-4.15-azure:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-4.15-gcp:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-4.15-generic:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-4.15-generic-lpae:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-4.15-gke:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-4.15-kvm:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-4.15-lowlatency:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-4.15-oracle:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-4.15-raspi2:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-aws-hwe:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-azure:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-gcp:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-generic-hwe-16.04:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-16.04:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-gke:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-gke-4.15:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-16.04:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-oem:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-oracle:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-raspi2:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-virtual:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-virtual-hwe-16.04:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-snapdragon:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-4.15-oem:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-4.15-snapdragon:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-aws-lts-18.04:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-azure-lts-18.04:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-oracle-lts-18.04:*:*:*:*:*:*:*, p-cpe:2.3:a:canonical:ubuntu_linux:linux-image-azure-edge:*:*:*:*:*:*:*

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/11/2020

Vulnerability Publication Date: 4/17/2020

Reference Information

CVE: CVE-2020-1749, CVE-2020-0067, CVE-2020-12464, CVE-2020-12114, CVE-2020-10751, CVE-2020-0543

USN: 4390-1