CBL Mariner 2.0 Security Update: PyYAML (CVE-2020-1747)

critical Nessus Plugin ID 185501

Synopsis

The remote CBL Mariner host is missing one or more security updates.

Description

The version of PyYAML installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2020-1747 advisory.

- A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. An attacker could use this flaw to execute arbitrary code on the system by abusing the python/object/new constructor. (CVE-2020-1747)

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

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 185501

File Name: mariner_pyyaml_CVE-2020-1747.nasl

Version: 1.0

Type: local

Family: MarinerOS Local Security Checks

Published: 11/13/2023

Updated: 11/13/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2020-1747

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: p-cpe:/a:microsoft:cbl-mariner:pyyaml-debuginfo, p-cpe:/a:microsoft:cbl-mariner:pyyaml, x-cpe:/o:microsoft:cbl-mariner

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/CBLMariner/release, Host/CBLMariner/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 11/2/2023

Vulnerability Publication Date: 3/19/2020

Reference Information

CVE: CVE-2020-1747

Detections

Analytics