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    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.

    Published:Mar 23, 2021
    Last Modified:Feb 5, 2025
    EPS:Apr 19, 2023
    EPSS Score:0.00054
    CVSS Score:5.5

    Affected Products

    Vendor
    Canonical
    Product
    Cloud-init
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Eus

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-215 Fuzzing for application mapping

    Related CVEs

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    CVE-2023-1786 (CVSS 5.5) — Sensitive data could be exposed in logs of cloud-init before version 23.1.2. An attacker could use this inform…
    CVE-2022-2084 (CVSS 5.5) — Sensitive data could be exposed in world readable logs of cloud-init before version 22.3 when schema failures …
    CVE-2020-8631 (CVSS 5.5) — cloud-init through 19.4 relies on Mersenne Twister for a random password, which makes it easier for attackers …
    CVE-2020-8632 (CVSS 5.5) — In cloud-init through 19.4, rand_user_password in cloudinit/config/cc_set_passwords.py has a small default pwl…
    CVE-2018-10896 (CVSS 7.1) — The default cloud-init configuration, in cloud-init 0.6.2 and newer, included "ssh_deletekeys: 0", disabling c…
    CVE-2012-6639 (CVSS 8.8) — An privilege elevation vulnerability exists in Cloud-init before 0.7.0 when requests to an untrusted system ar…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High