Ubuntu 18.04 LTS / 20.04 LTS : Linux kernel vulnerabilities (USN-4525-1)

high Nessus Plugin ID 140723

Synopsis

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

Description

The remote Ubuntu 18.04 LTS / 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4525-1 advisory.

- A memory leak in the ccp_run_sha_cmd() function in drivers/crypto/ccp/ccp-ops.c in the Linux kernel through 5.3.9 allows attackers to cause a denial of service (memory consumption), aka CID-128c66429247.
(CVE-2019-18808)

- A memory leak in the cx23888_ir_probe() function in drivers/media/pci/cx23885/cx23888-ir.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering kfifo_alloc() failures, aka CID-a7b2df76b42b. (CVE-2019-19054)

- The VFIO PCI driver in the Linux kernel through 5.6.13 mishandles attempts to access disabled memory space. (CVE-2020-12888)

- The Linux kernel through 5.7.11 allows remote attackers to make observations that help to obtain sensitive information about the internal state of the network RNG, aka CID-f227e3ec3b5c. This is related to drivers/char/random.c and kernel/time/timer.c. (CVE-2020-16166)

- A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452. (CVE-2020-25212)

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-4525-1

Plugin Details

Severity: High

ID: 140723

File Name: ubuntu_USN-4525-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 9/22/2020

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: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.3

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

CVSS Score Source: CVE-2020-25212

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1019-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1024-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1025-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1025-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1025-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1026-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-48-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-48-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-48-lowlatency

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/21/2020

Vulnerability Publication Date: 11/7/2019

Reference Information

CVE: CVE-2019-18808, CVE-2019-19054, CVE-2020-12888, CVE-2020-16166, CVE-2020-25212

USN: 4525-1