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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/canonical/cloud-init/commit/b794d426b9ab43ea9d6371477466070d86e10668	Patch
https://github.com/canonical/cloud-init/commit/b794d426b9ab43ea9d6371477466070d86e10668	Patch

Configurations

Configuration 1 (hide)

cpe:2.3:a:canonical:cloud-init:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2023-04-19 22:15

Updated : 2025-02-05 15:15

NVD link : CVE-2021-3429

Mitre link : CVE-2021-3429

CVE.ORG link : CVE-2021-3429

JSON object : View

Products Affected

canonical

cloud-init

CWE

CWE-532

Insertion of Sensitive Information into Log File

{"id": "CVE-2021-3429", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security@ubuntu.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 1.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 1.8}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2023-04-19T22:15:10.137", "references": [{"url": "https://github.com/canonical/cloud-init/commit/b794d426b9ab43ea9d6371477466070d86e10668", "tags": ["Patch"], "source": "security@ubuntu.com"}, {"url": "https://github.com/canonical/cloud-init/commit/b794d426b9ab43ea9d6371477466070d86e10668", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security@ubuntu.com", "description": [{"lang": "en", "value": "CWE-532"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-532"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-532"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2025-02-05T15:15:13.403", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:canonical:cloud-init:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "24AE1645-A98F-41D7-8F77-8647A25E6B4A", "versionEndExcluding": "21.2"}], "operator": "OR"}]}], "sourceIdentifier": "security@ubuntu.com"}