QID 352245

Date Published: 2021-03-25

QID 352245: Amazon Linux Security Advisory for cloud-init: ALAS-2021-1486

<DIV> Issue Overview:

A flaw was found in cloud-init, where it uses the random.choice function when creating sensitive random strings used for generating a random password in new instances. Depending on the instance configuration, a remote or local attacker may abuse this vulnerability to guess the password of the victim user. (CVE-2020-8631 )

A flaw was found in cloud-init, where it uses short passwords when generating a random password in new instances. Depending on the instance configuration, a remote or local attacker may abuse this vulnerability to guess the password of the victim user. (CVE-2020-8632 )

A vulnerability was discovered in cloud-init which can improperly disclose randomly generated passwords as part of the chpasswd module. The fix prevents the generated password from being written to a world-readable log file on the local disk. (CVE-2021-3429 )

</DIV>

Allows unauthorized disclosure of information; allows unauthorized modification; allows disruption of service.

CVSS V3 rated as Medium - 5.5 severity.

CVSS V2 rated as Low - 2.1 severity.

Solution

Please refer to Amazon advisory ALAS-2021-1486 for affected packages and patching details, or update with your package manager.

Vendor References

ALAS-2021-1486 - alas.aws.amazon.com/ALAS-2021-1486.html

CVEs related to QID 352245

CVE-2020-8631 | CVE-2020-8632 | CVE-2021-3429 |

Software Advisories

Advisory ID	Software	Component	Link
ALAS-2021-1486	Amazon Linux	cloud-init (0.7.6-43.23.amzn1) on noarch	alas.aws.amazon.com/ALAS-2021-1486.html
ALAS-2021-1486	Amazon Linux	cloud-init (0.7.6-43.23.amzn1) on src	alas.aws.amazon.com/ALAS-2021-1486.html

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