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Debian DLA-3533-1 : lxc - LTS security update

low Nessus Plugin ID 179935

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Synopsis

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

Description

The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3533 advisory.

 - lxc-user-nic in lxc through 5.0.1 is installed setuid root, and may allow local users to infer whether any file exists, even within a protected directory tree, because Failed to open often indicates that a file does not exist, whereas does not refer to a network namespace path often indicates that a file exists.
 NOTE: this is different from CVE-2018-6556 because the CVE-2018-6556 fix design was based on the premise that we will report back to the user that the open() failed but the user has no way of knowing why it failed; however, in many realistic cases, there are no plausible reasons for failing except that the file does not exist. (CVE-2022-47952)

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 lxc packages.

For Debian 10 buster, this problem has been fixed in version 1

See Also

https://security-tracker.debian.org/tracker/source-package/lxc

https://www.debian.org/lts/security/2023/dla-3533

https://security-tracker.debian.org/tracker/CVE-2022-47952

https://packages.debian.org/source/buster/lxc

Plugin Details

Severity: Low

ID: 179935

File Name: debian_DLA-3533.nasl

Version: 1.0

Type: local

Agent: unix

Published: 8/17/2023

Updated: 8/17/2023

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

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Low

Base Score: 1.7

Temporal Score: 1.3

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

CVSS Score Source: CVE-2022-47952

CVSS v3

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.9

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:lxc, cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:liblxc1, p-cpe:/a:debian:debian_linux:lxc-dev, p-cpe:/a:debian:debian_linux:libpam-cgfs, p-cpe:/a:debian:debian_linux:lxc-tests

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/17/2023

Vulnerability Publication Date: 1/1/2023

Reference Information

CVE: CVE-2022-47952