rhsa-2021_3081
Vulnerability from csaf_redhat
Published
2021-08-10 16:34
Modified
2024-11-05 23:49
Summary
Red Hat Security Advisory: cloud-init security update

Notes

Topic
An update for cloud-init is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The cloud-init packages provide a set of init scripts for cloud instances. Cloud instances need special scripts to run during initialization to retrieve and install SSH keys, and to let the user run various scripts. Security Fix(es): * cloud-init: randomly generated passwords logged in clear-text to world-readable file (CVE-2021-3429) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


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{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Moderate"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "An update for cloud-init is now available for Red Hat Enterprise Linux 8.\n\nRed Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "The cloud-init packages provide a set of init scripts for cloud instances. Cloud instances need special scripts to run during initialization to retrieve and install SSH keys, and to let the user run various scripts.\n\nSecurity Fix(es):\n\n* cloud-init: randomly generated passwords logged in clear-text to world-readable file (CVE-2021-3429)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2021:3081",
        "url": "https://access.redhat.com/errata/RHSA-2021:3081"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/#moderate",
        "url": "https://access.redhat.com/security/updates/classification/#moderate"
      },
      {
        "category": "external",
        "summary": "1940967",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1940967"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_3081.json"
      }
    ],
    "title": "Red Hat Security Advisory: cloud-init security update",
    "tracking": {
      "current_release_date": "2024-11-05T23:49:22+00:00",
      "generator": {
        "date": "2024-11-05T23:49:22+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.1.1"
        }
      },
      "id": "RHSA-2021:3081",
      "initial_release_date": "2021-08-10T16:34:34+00:00",
      "revision_history": [
        {
          "date": "2021-08-10T16:34:34+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2021-08-10T16:34:34+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2024-11-05T23:49:22+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux AppStream (v. 8)",
                "product": {
                  "name": "Red Hat Enterprise Linux AppStream (v. 8)",
                  "product_id": "AppStream-8.4.0.Z.MAIN.EUS",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:redhat:enterprise_linux:8::appstream"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Enterprise Linux"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "cloud-init-0:20.3-10.el8_4.5.src",
                "product": {
                  "name": "cloud-init-0:20.3-10.el8_4.5.src",
                  "product_id": "cloud-init-0:20.3-10.el8_4.5.src",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/cloud-init@20.3-10.el8_4.5?arch=src"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "src"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "cloud-init-0:20.3-10.el8_4.5.noarch",
                "product": {
                  "name": "cloud-init-0:20.3-10.el8_4.5.noarch",
                  "product_id": "cloud-init-0:20.3-10.el8_4.5.noarch",
                  "product_identification_helper": {
                    "purl": "pkg:rpm/redhat/cloud-init@20.3-10.el8_4.5?arch=noarch"
                  }
                }
              }
            ],
            "category": "architecture",
            "name": "noarch"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cloud-init-0:20.3-10.el8_4.5.noarch as a component of Red Hat Enterprise Linux AppStream (v. 8)",
          "product_id": "AppStream-8.4.0.Z.MAIN.EUS:cloud-init-0:20.3-10.el8_4.5.noarch"
        },
        "product_reference": "cloud-init-0:20.3-10.el8_4.5.noarch",
        "relates_to_product_reference": "AppStream-8.4.0.Z.MAIN.EUS"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "cloud-init-0:20.3-10.el8_4.5.src as a component of Red Hat Enterprise Linux AppStream (v. 8)",
          "product_id": "AppStream-8.4.0.Z.MAIN.EUS:cloud-init-0:20.3-10.el8_4.5.src"
        },
        "product_reference": "cloud-init-0:20.3-10.el8_4.5.src",
        "relates_to_product_reference": "AppStream-8.4.0.Z.MAIN.EUS"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-3429",
      "cwe": {
        "id": "CWE-532",
        "name": "Insertion of Sensitive Information into Log File"
      },
      "discovery_date": "2021-03-19T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1940967"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in cloud-init. When a system is configured through cloud-init and the \"Set Passwords\" module is used with \"chpasswd\" directive and \"RANDOM\", the randomly generated password for the relative user is written in clear-text in a file readable by any existing user of the system. The highest threat from this vulnerability is to data confidentiality and it may allow a local attacker to log in as another user.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "cloud-init: randomly generated passwords logged in clear-text to world-readable file",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "By default the randomly password generated by \"chpasswd\" must be changed on the first login of the user. That means that once a user accesses the system for the first time, the random password in the log file cannot be used anymore. However it is possible to configure an extended validity period for the random password, thus the actual impact of this password leak may vary based on the environment and how the systems are configured through cloud-init.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "AppStream-8.4.0.Z.MAIN.EUS:cloud-init-0:20.3-10.el8_4.5.noarch",
          "AppStream-8.4.0.Z.MAIN.EUS:cloud-init-0:20.3-10.el8_4.5.src"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2021-3429"
        },
        {
          "category": "external",
          "summary": "RHBZ#1940967",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1940967"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2021-3429",
          "url": "https://www.cve.org/CVERecord?id=CVE-2021-3429"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-3429",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3429"
        }
      ],
      "release_date": "2021-03-23T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-08-10T16:34:34+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "AppStream-8.4.0.Z.MAIN.EUS:cloud-init-0:20.3-10.el8_4.5.noarch",
            "AppStream-8.4.0.Z.MAIN.EUS:cloud-init-0:20.3-10.el8_4.5.src"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2021:3081"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "AppStream-8.4.0.Z.MAIN.EUS:cloud-init-0:20.3-10.el8_4.5.noarch",
            "AppStream-8.4.0.Z.MAIN.EUS:cloud-init-0:20.3-10.el8_4.5.src"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "cloud-init: randomly generated passwords logged in clear-text to world-readable file"
    }
  ]
}


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