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Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-4389-1)

medium Nessus Plugin ID 137299

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Synopsis

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

Description

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4389-1 advisory.

 - In f2fs_xattr_generic_list of xattr.c, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not required for exploitation.Product: Android. Versions: Android kernel. Android ID:
 A-120551147. (CVE-2020-0067)

 - Incomplete cleanup from specific special register read operations in some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. (CVE-2020-0543)

 - A flaw was found in the Linux kernels SELinux LSM hook implementation before version 5.7, where it incorrectly assumed that an skb would only contain a single netlink message. The hook would incorrectly only validate the first netlink message in the skb and allow or deny the rest of the messages within the skb with the granted permission without further processing. (CVE-2020-10751)

 - A pivot_root race condition in fs/namespace.c in the Linux kernel 4.4.x before 4.4.221, 4.9.x before 4.9.221, 4.14.x before 4.14.178, 4.19.x before 4.19.119, and 5.x before 5.3 allows local users to cause a denial of service (panic) by corrupting a mountpoint reference counter. (CVE-2020-12114)

 - usb_sg_cancel in drivers/usb/core/message.c in the Linux kernel before 5.6.8 has a use-after-free because a transfer occurs without a reference, aka CID-056ad39ee925. (CVE-2020-12464)

 - An issue was discovered in the Linux kernel before 5.6.7. xdp_umem_reg in net/xdp/xdp_umem.c has an out- of-bounds write (by a user with the CAP_NET_ADMIN capability) because of a lack of headroom validation.
 (CVE-2020-12659)

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-4389-1

Plugin Details

Severity: Medium

ID: 137299

File Name: ubuntu_USN-4389-1.nasl

Version: 1.7

Type: local

Agent: unix

Published: 6/10/2020

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: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.6

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

CVSS Score Source: CVE-2020-12659

CVSS v3

Risk Factor: Medium

Base Score: 6.7

Temporal Score: 6

Vector: CVSS:3.0/AV:L/AC:L/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: p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1012-raspi, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1015-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1015-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1015-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1015-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1016-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-27-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-37-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-37-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-37-lowlatency, cpe:/o:canonical:ubuntu_linux:20.04:-:lts

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: 6/10/2020

Vulnerability Publication Date: 4/17/2020

Reference Information

CVE: CVE-2020-0067, CVE-2020-0543, CVE-2020-10751, CVE-2020-12114, CVE-2020-12464, CVE-2020-12659

USN: 4389-1