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Ubuntu 16.04 ESM / 18.04 LTS : Linux kernel vulnerabilities (USN-5268-1)

high Nessus Plugin ID 157352

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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-5268-1 advisory.

 - A flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux kernel functionality was found to allow the ability to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypass the source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well. (CVE-2021-20322)

 - A flaw use-after-free in function sco_sock_sendmsg() of the Linux kernel HCI subsystem was found in the way user calls ioct UFFDIO_REGISTER or other way triggers race condition of the call sco_conn_del() together with the call sco_sock_sendmsg() with the expected controllable faulting memory page. A privileged local user could use this flaw to crash the system or escalate their privileges on the system.
 (CVE-2021-3640)

 - A use-after-free flaw was found in the Linux kernel's Bluetooth subsystem in the way user calls connect to the socket and disconnect simultaneously due to a race condition. This flaw allows a user to crash the system or escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-3752)

 - A heap-based buffer overflow flaw was found in the Linux kernel FireDTV media card driver, where the user calls the CA_SEND_MSG ioctl. This flaw allows a local user of the host machine to crash the system or escalate privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2021-42739)

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-5268-1

Plugin Details

Severity: High

ID: 157352

File Name: ubuntu_USN-5268-1.nasl

Version: 1.10

Type: local

Agent: unix

Published: 2/3/2022

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: High

Base Score: 7.9

Temporal Score: 6.2

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

CVSS Score Source: CVE-2021-3752

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.7

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

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

CVSS Score Source: CVE-2021-20322

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-4.15.0-1034-dell300x, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1086-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1102-raspi2, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1106-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1115-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1119-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1119-snapdragon, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1130-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-167-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-167-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-167-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: 2/3/2022

Vulnerability Publication Date: 10/20/2021

Reference Information

CVE: CVE-2021-20322, CVE-2021-3640, CVE-2021-3752, CVE-2021-42739

USN: 5268-1