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Debian DLA-2841-1 : runc - LTS security update

medium Nessus Plugin ID 155921

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2841 advisory.

 It was discovered that there was an overflow issue in runc, the runtime for the Open Container Project, often used with Docker. The Netlink 'bytemsg' length field could have allowed an attacker to override Netlink-based container configurations. This vulnerability required the attacker to have some control over the configuration of the container, but would have allowed the attacker to bypass the namespace restrictions of the container by simply adding their own Netlink payload which disables all namespaces.
 CVE-2021-43784 For Debian 9 Stretch, these problems have been fixed in version 0.1.1+dfsg1-2+deb9u3. We recommend that you upgrade your runc packages. Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at:
 https://wiki.debian.org/LTS

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

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the runc packages.

For Debian 9 Stretch, these problems have been fixed in version 0.1.1+dfsg1-2+deb9u3.

See Also

https://www.debian.org/lts/security/2021/dla-2841

https://security-tracker.debian.org/tracker/CVE-2021-43784

https://packages.debian.org/source/stretch/runc

Plugin Details

Severity: Medium

ID: 155921

File Name: debian_DLA-2841.nasl

Version: 1.4

Type: local

Agent: unix

Published: 12/8/2021

Updated: 1/24/2025

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 4.7

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

CVSS Score Source: CVE-2021-43784

CVSS v3

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.5

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:runc, cpe:/o:debian:debian_linux:9.0, p-cpe:/a:debian:debian_linux:golang-github-opencontainers-runc-dev

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/6/2021

Vulnerability Publication Date: 12/6/2021

Reference Information

CVE: CVE-2021-43784