Security Updates for RancherOS Information Disclosure Vulnerabily

Medium Nessus Plugin ID 132253

Synopsis

The remote device is missing a vendor-supplied security patch

Description

The remote host is running a version of RancherOS prior to v1.4.1, hence is exposed to multiple side-channel vulnerabilities:

- Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access via a terminal page fault and a side-channel analysis. (CVE-2018-3620)

- Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4.
(CVE-2018-3639)

Solution

Upgrade to RancherOS v1.4.1 or later

See Also

https://rancher.com/docs/os/v1.x/en/about/security/

https://github.com/rancher/os/releases/tag/v1.4.1

Plugin Details

Severity: Medium

ID: 132253

File Name: rancheros_1_4_1.nasl

Version: 1.3

Type: local

Family: Misc.

Published: 2019/12/19

Updated: 2020/07/31

Dependencies: 12634, 25335

Risk Information

Risk Factor: Medium

CVSS Score Source: CVE-2018-3639

CVSS v2.0

Base Score: 4.9

Temporal Score: 3.8

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

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

CVSS v3.0

Base Score: 5.5

Temporal Score: 5

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

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

Vulnerability Information

CPE: cpe:/o:rancher:rancheros

Required KB Items: Host/local_checks_enabled, Host/RancherOS/version, Host/RancherOS

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2018/09/19

Vulnerability Publication Date: 2018/05/22

Reference Information

CVE: CVE-2018-3620, CVE-2018-3639

BID: 104232, 105080