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Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 / 24.04 LTS : Intel Microcode vulnerabilities (USN-6797-1)

high Nessus Plugin ID 198069

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Synopsis

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

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 / 24.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6797-1 advisory.

 It was discovered that some 3rd and 4th Generation Intel Xeon Processors did not properly restrict access to certain hardware features when using Intel SGX or Intel TDX. This may allow a privileged local user to potentially further escalate their privileges on the system. This issue only affected Ubuntu 23.10, Ubuntu 22.04 LTS, Ubuntu 20.04 LTS, Ubuntu 18.04 LTS and Ubuntu 16.04 LTS. (CVE-2023-22655)

 It was discovered that some Intel Atom Processors did not properly clear register state when performing various operations. A local attacker could use this to obtain sensitive information via a transient execution attack. This issue only affected Ubuntu 23.10, Ubuntu 22.04 LTS, Ubuntu 20.04 LTS, Ubuntu 18.04 LTS and Ubuntu 16.04 LTS. (CVE-2023-28746)

 It was discovered that some Intel Processors did not properly clear the state of various hardware structures when switching execution contexts. A local attacker could use this to access privileged information. This issue only affected Ubuntu 23.10, Ubuntu 22.04 LTS, Ubuntu 20.04 LTS, Ubuntu 18.04 LTS and Ubuntu 16.04 LTS. (CVE-2023-38575)

 It was discovered that some Intel Processors did not properly enforce bus lock regulator protections. A remote attacker could use this to cause a denial of service. This issue only affected Ubuntu 23.10, Ubuntu 22.04 LTS, Ubuntu 20.04 LTS, Ubuntu 18.04 LTS and Ubuntu 16.04 LTS. (CVE-2023-39368)

 It was discovered that some Intel Xeon D Processors did not properly calculate the SGX base key when using Intel SGX. A privileged local attacker could use this to obtain sensitive information. This issue only affected Ubuntu 23.10, Ubuntu 22.04 LTS, Ubuntu 20.04 LTS, Ubuntu 18.04 LTS and Ubuntu 16.04 LTS.
 (CVE-2023-43490)

 It was discovered that some Intel Processors did not properly protect against concurrent accesses. A local attacker could use this to obtain sensitive information. (CVE-2023-45733)

 It was discovered that some Intel Processors TDX module software did not properly validate input. A privileged local attacker could use this information to potentially further escalate their privileges on the system. (CVE-2023-45745, CVE-2023-47855)

 It was discovered that some Intel Core Ultra processors did not properly handle particular instruction sequences. A local attacker could use this issue to cause a denial of service.
 (CVE-2023-46103)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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 intel-microcode package.

See Also

https://ubuntu.com/security/notices/USN-6797-1

Plugin Details

Severity: High

ID: 198069

File Name: ubuntu_USN-6797-1.nasl

Version: 1.1

Type: local

Agent: unix

Published: 5/29/2024

Updated: 5/29/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.1

CVSS v2

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 4.4

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

CVSS Score Source: CVE-2023-47855

CVSS v3

Risk Factor: High

Base Score: 7.9

Temporal Score: 6.9

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

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

CVSS Score Source: CVE-2023-45745

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:23.10, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:intel-microcode

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/29/2024

Vulnerability Publication Date: 3/12/2024

Reference Information

CVE: CVE-2023-22655, CVE-2023-28746, CVE-2023-38575, CVE-2023-39368, CVE-2023-43490, CVE-2023-45733, CVE-2023-45745, CVE-2023-46103, CVE-2023-47855

USN: 6797-1