SB2020110440 - Red Hat Enterprise Linux 8 update for cloud-init

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Main Vulnerability Database SB2020110440

SB2020110440 - Red Hat Enterprise Linux 8 update for cloud-init

Published: November 4, 2020

Security Bulletin ID SB2020110440
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Use of insufficiently random values (CVE-ID: CVE-2020-8631)

CWE-ID: CWE-330 - Use of Insufficiently Random Values

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to predict passwords.

The vulnerability exists due to cloud-init relies on Mersenne Twister for a random password, which uses the random.choice() function in rand_str() in cloudinit/util.py. A local user can guess randomly generated passwords and gain unauthorized access.


2) Insufficiently protected credentials (CVE-ID: CVE-2020-8632)

CWE-ID: CWE-522 - Insufficiently Protected Credentials

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to guess passwords.

The vulnerability exists due to cloud-init has a small default pwlen value in rand_user_password() function in cloudinit/config/cc_set_passwords.py. A local user can guess passwords and gain unauthorized access to the application.


Remediation

Install update from vendor's website.

References