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Ubuntu 16.04 ESM / 18.04 LTS : Linux kernel vulnerabilities (USN-5044-1)

medium Nessus Plugin ID 152640

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Synopsis

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

Description

The remote Ubuntu 16.04 ESM / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5044-1 advisory.

 - A flaw double-free memory corruption in the Linux kernel HCI device initialization subsystem was found in the way user attach malicious HCI TTY Bluetooth device. A local user could use this flaw to crash the system. This flaw affects all the Linux kernel versions starting from 3.13. (CVE-2021-3564)

 - A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system. This flaw affects the Linux kernel versions prior to 5.13-rc5. (CVE-2021-3573)

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-5044-1

Plugin Details

Severity: Medium

ID: 152640

File Name: ubuntu_USN-5044-1.nasl

Version: 1.8

Type: local

Agent: unix

Published: 8/18/2021

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: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.4

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

CVSS Score Source: CVE-2021-3573

CVSS v3

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5.8

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:esm, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1079-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1094-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1098-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1107-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1110-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1111-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1122-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-154-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-154-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-154-lowlatency

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: 8/18/2021

Vulnerability Publication Date: 5/26/2021

Reference Information

CVE: CVE-2021-3564, CVE-2021-3573

USN: 5044-1