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Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel vulnerabilities (USN-5667-1)

high Nessus Plugin ID 166013

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Synopsis

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

Description

The remote Ubuntu 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5667-1 advisory.

 - A use-after-free flaw was found in the Linux kernel's pipes functionality in how a user performs manipulations with the pipe post_one_notification() after free_pipe_info() that is already called. This flaw allows a local user to crash or potentially escalate their privileges on the system. (CVE-2022-1882)

 - Non-transparent sharing of return predictor targets between contexts in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access. (CVE-2022-26373)

 - There exists a use-after-free in io_uring in the Linux kernel. Signalfd_poll() and binder_poll() use a waitqueue whose lifetime is the current task. It will send a POLLFREE notification to all waiters before the queue is freed. Unfortunately, the io_uring poll doesn't handle POLLFREE. This allows a use-after-free to occur if a signalfd or binder fd is polled with io_uring poll, and the waitqueue gets freed. We recommend upgrading past commit fc78b2fc21f10c4c9c4d5d659a685710ffa63659 (CVE-2022-3176)

 - An issue was discovered in the Linux kernel through 5.18.14. xfrm_expand_policies in net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice. (CVE-2022-36879)

 - An issue was discovered the x86 KVM subsystem in the Linux kernel before 5.18.17. Unprivileged guest users can compromise the guest kernel because TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED situations. (CVE-2022-39189)

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-5667-1

Plugin Details

Severity: High

ID: 166013

File Name: ubuntu_USN-5667-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 10/11/2022

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: 7.2

Temporal Score: 5.3

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

CVSS Score Source: CVE-2022-1882

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

CVSS Score Source: CVE-2022-39189

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1017-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1021-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-50-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-50-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-50-lowlatency-64k, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-50-generic-64k, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1019-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-50-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1004-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1016-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1016-raspi-nolpae, cpe:/o:canonical:ubuntu_linux:20.04:-:lts

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/10/2022

Vulnerability Publication Date: 5/26/2022

Reference Information

CVE: CVE-2022-1882, CVE-2022-26373, CVE-2022-3176, CVE-2022-36879, CVE-2022-39189

USN: 5667-1