Ubuntu 20.04 LTS : snapd vulnerabilities (USN-5292-2)

high Nessus Plugin ID 158160

Synopsis

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

Description

The remote Ubuntu 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5292-2 advisory.

USN-5292-1 fixed vulnerabilities in snapd. This update provides the corresponding update for the riscv64 architecture.

Original advisory details:

James Troup discovered that snap did not properly manage the permissions for

the snap directories. A local attacker could possibly use this issue to expose

sensitive information. (CVE-2021-3155)

Ian Johnson discovered that snapd did not properly validate content interfaces

and layout paths. A local attacker could possibly use this issue to inject

arbitrary AppArmor policy rules, resulting in a bypass of intended access

restrictions. (CVE-2021-4120)

The Qualys Research Team discovered that snapd did not properly validate the

location of the snap-confine binary. A local attacker could possibly use this

issue to execute other arbitrary binaries and escalate privileges.

(CVE-2021-44730)

The Qualys Research Team discovered that a race condition existed in the snapd

snap-confine binary when preparing a private mount namespace for a snap. A

local attacker could possibly use this issue to escalate privileges and

execute arbitrary code. (CVE-2021-44731)

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 packages.

See Also

https://ubuntu.com/security/notices/USN-5292-2

Plugin Details

Severity: High

ID: 158160

File Name: ubuntu_USN-5292-2.nasl

Version: 1.9

Type: local

Agent: unix

Published: 2/18/2022

Updated: 8/27/2024

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

Risk Information

VPR

Risk Factor: High

Score: 7.3

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-2021-44731

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.9

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

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

CVSS Score Source: CVE-2021-44730

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:ubuntu-core-launcher, p-cpe:/a:canonical:ubuntu_linux:snapd-xdg-open, p-cpe:/a:canonical:ubuntu_linux:golang-github-ubuntu-core-snappy-dev, p-cpe:/a:canonical:ubuntu_linux:ubuntu-snappy-cli, p-cpe:/a:canonical:ubuntu_linux:snap-confine, p-cpe:/a:canonical:ubuntu_linux:snapd, p-cpe:/a:canonical:ubuntu_linux:golang-github-snapcore-snapd-dev, p-cpe:/a:canonical:ubuntu_linux:ubuntu-snappy, p-cpe:/a:canonical:ubuntu_linux:ubuntu-core-snapd-units

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/18/2022

Vulnerability Publication Date: 2/17/2022

Reference Information

CVE: CVE-2021-3155, CVE-2021-4120, CVE-2021-44730, CVE-2021-44731

USN: 5292-2