Medium severity · published Apr 19, 2023
CVE-2021-3429
sensitive data exposure in cloud-init logs
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CL
cloud-init · Canonical Ltd.
before 21.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3429
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3429
Patch
https://github.com/canonical/cloud-init/commit/b794d426b9ab43ea9d6371477466070d86e10668
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