Vulnerability-Lookup

CVE-2020-8631 (GCVE-0-2020-8631)

Vulnerability from cvelistv5 – Published: 2020-02-05 13:39 – Updated: 2024-08-04 10:03

Summary

cloud-init through 19.4 relies on Mersenne Twister for a random password, which makes it easier for attackers to predict passwords, because rand_str in cloudinit/util.py calls the random.choice function.

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CWE

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2339 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/canonical/cloud-init/pull/204	x_refsource_MISC
https://bugs.launchpad.net/ubuntu/+source/cloud-i…	x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2020…	mailing-listx_refsource_MLIST
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE

Show details on NVD website

JSON

To clipboard

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CNVD-2020-29639

Vulnerability from cnvd - Published: 2020-05-24

Title

Cloud-init安全特征问题漏洞

Description

Cloud-init是一款用于云平台的虚拟机初始化工具。 cloud-init 19.4及之前版本中存在安全漏洞，该漏洞源于cloudinit/util.py文件中的rand_str调用了‘random.choice’函数。攻击者可利用该漏洞猜测出密码。

Severity

低

Patch Name

Cloud-init安全特征问题漏洞的补丁

Patch Description

Cloud-init是一款用于云平台的虚拟机初始化工具。 cloud-init 19.4及之前版本中存在安全漏洞，该漏洞源于cloudinit/util.py文件中的rand_str调用了‘random.choice’函数。攻击者可利用该漏洞猜测出密码。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新: https://cloud-init.io/

Reference

https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1860795

Impacted products

Name
cloud-init cloud-init <19.4

Show details on source website

JSON

To clipboard

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FKIE_CVE-2020-8631

Vulnerability from fkie_nvd - Published: 2020-02-05 14:15 - Updated: 2026-06-17 03:26

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Summary

References

URL	Tags
cve@mitre.org	http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00042.html	Mailing List, Third Party Advisory
cve@mitre.org	https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1860795	Issue Tracking, Patch, Third Party Advisory
cve@mitre.org	https://github.com/canonical/cloud-init/pull/204	Patch, Third Party Advisory
cve@mitre.org	https://lists.debian.org/debian-lts-announce/2020/02/msg00021.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00042.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1860795	Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://github.com/canonical/cloud-init/pull/204	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2020/02/msg00021.html	Mailing List, Third Party Advisory

Impacted products

Vendor	Product	Version
canonical	cloud-init	*
opensuse	leap	15.1
debian	debian_linux	8.0

JSON

To clipboard

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  ],
  "id": "CVE-2020-8631",
  "lastModified": "2026-06-17T03:26:40.817",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 2.1,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-02-05T14:15:11.607",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00042.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1860795"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/canonical/cloud-init/pull/204"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2020/02/msg00021.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00042.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1860795"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/canonical/cloud-init/pull/204"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2020/02/msg00021.html"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-330"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-2R47-HHFF-7QCP

Vulnerability from github – Published: 2022-05-24 17:08 – Updated: 2022-05-24 17:08

Details

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2020-8631"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-330"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-02-05T14:15:00Z",
    "severity": "LOW"
  },
  "details": "cloud-init through 19.4 relies on Mersenne Twister for a random password, which makes it easier for attackers to predict passwords, because rand_str in cloudinit/util.py calls the random.choice function.",
  "id": "GHSA-2r47-hhff-7qcp",
  "modified": "2022-05-24T17:08:06Z",
  "published": "2022-05-24T17:08:06Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8631"
    },
    {
      "type": "WEB",
      "url": "https://github.com/canonical/cloud-init/pull/204"
    },
    {
      "type": "WEB",
      "url": "https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1860795"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2020/02/msg00021.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00042.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GSD-2020-8631

Vulnerability from gsd - Updated: 2023-12-13 01:21

Details

Aliases

CVE-2020-8631

Aliases

CVE-2020-8631

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2020-8631",
    "description": "cloud-init through 19.4 relies on Mersenne Twister for a random password, which makes it easier for attackers to predict passwords, because rand_str in cloudinit/util.py calls the random.choice function.",
    "id": "GSD-2020-8631",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-8631.html",
      "https://access.redhat.com/errata/RHSA-2020:4650",
      "https://access.redhat.com/errata/RHSA-2020:3898",
      "https://advisories.mageia.org/CVE-2020-8631.html",
      "https://alas.aws.amazon.com/cve/html/CVE-2020-8631.html",
      "https://linux.oracle.com/cve/CVE-2020-8631.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-8631"
      ],
      "details": "cloud-init through 19.4 relies on Mersenne Twister for a random password, which makes it easier for attackers to predict passwords, because rand_str in cloudinit/util.py calls the random.choice function.",
      "id": "GSD-2020-8631",
      "modified": "2023-12-13T01:21:53.445637Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2020-8631",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
          ]
        }
      },
      "data_format": "MITRE",
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      "data_version": "4.0",
      "description": {
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          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/canonical/cloud-init/pull/204",
            "refsource": "MISC",
            "url": "https://github.com/canonical/cloud-init/pull/204"
          },
          {
            "name": "https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1860795",
            "refsource": "MISC",
            "url": "https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1860795"
          },
          {
            "name": "[debian-lts-announce] 20200221 [SECURITY] [DLA 2113-1] cloud-init security update",
            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2020/02/msg00021.html"
          },
          {
            "name": "openSUSE-SU-2020:0400",
            "refsource": "SUSE",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00042.html"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:canonical:cloud-init:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "19.4",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-8631"
        },
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        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "cloud-init through 19.4 relies on Mersenne Twister for a random password, which makes it easier for attackers to predict passwords, because rand_str in cloudinit/util.py calls the random.choice function."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-330"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/canonical/cloud-init/pull/204",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/canonical/cloud-init/pull/204"
            },
            {
              "name": "https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1860795",
              "refsource": "MISC",
              "tags": [
                "Issue Tracking",
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1860795"
            },
            {
              "name": "[debian-lts-announce] 20200221 [SECURITY] [DLA 2113-1] cloud-init security update",
              "refsource": "MLIST",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "https://lists.debian.org/debian-lts-announce/2020/02/msg00021.html"
            },
            {
              "name": "openSUSE-SU-2020:0400",
              "refsource": "SUSE",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00042.html"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 2.1,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "LOW",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "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"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2021-12-22T18:18Z",
      "publishedDate": "2020-02-05T14:15Z"
    }
  }
}

MSRC_CVE-2020-8631

Vulnerability from csaf_microsoft - Published: 2020-02-02 00:00 - Updated: 2020-08-18 00:00

Summary

cloud-init through 19.4 relies on Mersenne Twister for a random password which makes it easier for attackers to predict passwords because rand_str in cloudinit/util.py calls the random.choice function.

Scope

1 vulnerability in this advisory, including CVE-2020-8631.

CVE-2020-8631

5.5 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Fixed: 1 product Known affected: 1 product

https://learn.microsoft.com/en-us/azure/azure-linux/tutoria…

Open the full advisory

OPENSUSE-SU-2020:0400-1

Vulnerability from csaf_opensuse - Published: 2020-03-28 23:18 - Updated: 2026-09-20 19:04

Summary

Security update for cloud-init

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2020-8631.

CVE-2020-8631

8.1 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Recommended: 3 products

Open the full advisory

OPENSUSE-SU-2024:10688-1

Vulnerability from csaf_opensuse - Published: 2024-06-15 00:00 - Updated: 2026-09-20 20:03

Summary

cloud-init-21.2-1.2 on GA media

Severity

Moderate

Scope

3 vulnerabilities in this advisory, including CVE-2020-8631.

CVE-2020-8631

8.1 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Recommended: 12 products

Open the full advisory

RHSA-2020:3898

Vulnerability from csaf_opensuse - Published: 2020-09-29 00:00 - Updated: 2026-09-20 11:10

Summary

security update for cloud-init

Severity

Moderate

Scope

3 vulnerabilities in this advisory, including CVE-2020-8631.

CVE-2020-8631

8.1 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Recommended: 1 product

Open the full advisory

RHSA-2020:4650

Vulnerability from csaf_opensuse - Published: 2020-11-03 00:00 - Updated: 2026-09-20 11:11

Summary

security update for cloud-init

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2020-8631.

CVE-2020-8631

8.1 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Recommended: 1 product

Open the full advisory

SUSE-SU-2020:0585-1

Vulnerability from csaf_suse - Published: 2020-03-04 10:58 - Updated: 2026-09-20 13:26

Summary

Security update for cloud-init

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2020-8631.

CVE-2020-8631

8.1 (High)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Recommended: 32 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CVE-2020-8631 (GCVE-0-2020-8631)

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