sensitive data exposure in cloud-init logs
CVE-2021-3429

5.5MEDIUM

Key Information:

Vendor

Canonical Ltd.

Status
Cloud-init
Vendor
CVE Published:
19 April 2023

What is CVE-2021-3429?

When instructing cloud-init to set a random password for a new user account, versions before 21.2 would write that password to the world-readable log file /var/log/cloud-init-output.log. This could allow a local user to log in as another user.

Affected Version(s)

cloud-init Linux 0 < 21.2

References

https://github.com/canonical/cloud-init/commit/b794d426b9...
patch

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Carl Pearson
.
CVE-2021-3429 : sensitive data exposure in cloud-init logs