#VU51629 Inclusion of Sensitive Information in Log Files in cloud-init (Ubuntu package) - CVE-2021-3429

Vulnerability identifier: #VU51629

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3429

CWE-ID: CWE-532

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
cloud-init (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor: Canonical Ltd.

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to cloud-init writes randomly generated passwords as part of the chpasswd module into log files. A local user can read the log files and gain access to sensitive data.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

cloud-init (Ubuntu package): 0.5.0 - 18.5

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External links
https://alas.aws.amazon.com/ALAS-2021-1486.html

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.