CVE-2020-8165 (GCVE-0-2020-8165)

Vulnerability from cvelistv5 – Published: 2020-06-19 17:05 – Updated: 2025-05-09 20:03
VLAI
Summary
A deserialization of untrusted data vulnernerability exists in rails < 5.2.4.3, rails < 6.0.3.1 that can allow an attacker to unmarshal user-provided objects in MemCacheStore and RedisCacheStore potentially resulting in an RCE.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-502 - Deserialization of Untrusted Data (CWE-502)
Assigner
References
Impacted products
Vendor Product Version CPE status
n/a https://github.com/rails/rails Affected: Fixed in 5.2.4.3, 6.0.3.1
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-05-09T20:03:28.191Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/413388"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1c"
          },
          {
            "name": "[debian-lts-announce] 20200619 [SECURITY] [DLA 2251-1] rails security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00022.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released/"
          },
          {
            "name": "[debian-lts-announce] 20200720 [SECURITY] [DLA 2282-1] rails security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2020/07/msg00013.html"
          },
          {
            "name": "DSA-4766",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2020/dsa-4766"
          },
          {
            "name": "openSUSE-SU-2020:1677",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.html"
          },
          {
            "name": "openSUSE-SU-2020:1679",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.html"
          },
          {
            "url": "https://security.netapp.com/advisory/ntap-20250509-0002/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "https://github.com/rails/rails",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Fixed in 5.2.4.3, 6.0.3.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A deserialization of untrusted data vulnernerability exists in rails \u003c 5.2.4.3, rails \u003c 6.0.3.1 that can allow an attacker to unmarshal user-provided objects in MemCacheStore and RedisCacheStore potentially resulting in an RCE."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
              "description": "Deserialization of Untrusted Data (CWE-502)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-10-17T11:06:36.000Z",
        "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
        "shortName": "hackerone"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/413388"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1c"
        },
        {
          "name": "[debian-lts-announce] 20200619 [SECURITY] [DLA 2251-1] rails security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00022.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released/"
        },
        {
          "name": "[debian-lts-announce] 20200720 [SECURITY] [DLA 2282-1] rails security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2020/07/msg00013.html"
        },
        {
          "name": "DSA-4766",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2020/dsa-4766"
        },
        {
          "name": "openSUSE-SU-2020:1677",
          "tags": [
            "vendor-advisory",
            "x_refsource_SUSE"
          ],
          "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.html"
        },
        {
          "name": "openSUSE-SU-2020:1679",
          "tags": [
            "vendor-advisory",
            "x_refsource_SUSE"
          ],
          "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.html"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "support@hackerone.com",
          "ID": "CVE-2020-8165",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "https://github.com/rails/rails",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "Fixed in 5.2.4.3, 6.0.3.1"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A deserialization of untrusted data vulnernerability exists in rails \u003c 5.2.4.3, rails \u003c 6.0.3.1 that can allow an attacker to unmarshal user-provided objects in MemCacheStore and RedisCacheStore potentially resulting in an RCE."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Deserialization of Untrusted Data (CWE-502)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://hackerone.com/reports/413388",
              "refsource": "MISC",
              "url": "https://hackerone.com/reports/413388"
            },
            {
              "name": "https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1c",
              "refsource": "MISC",
              "url": "https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1c"
            },
            {
              "name": "[debian-lts-announce] 20200619 [SECURITY] [DLA 2251-1] rails security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00022.html"
            },
            {
              "name": "https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released/",
              "refsource": "CONFIRM",
              "url": "https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released/"
            },
            {
              "name": "[debian-lts-announce] 20200720 [SECURITY] [DLA 2282-1] rails security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2020/07/msg00013.html"
            },
            {
              "name": "DSA-4766",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2020/dsa-4766"
            },
            {
              "name": "openSUSE-SU-2020:1677",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.html"
            },
            {
              "name": "openSUSE-SU-2020:1679",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1",
    "assignerShortName": "hackerone",
    "cveId": "CVE-2020-8165",
    "datePublished": "2020-06-19T17:05:30.000Z",
    "dateReserved": "2020-01-28T00:00:00.000Z",
    "dateUpdated": "2025-05-09T20:03:28.191Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2020-8165",
      "date": "2026-09-22",
      "epss": "0.45732",
      "percentile": "0.98745"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "4357891D-A07C-4E1B-B540-92D6C477E7BB",
                    "versionEndExcluding": "5.2.4.3",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "12B5617A-91AC-4B94-BE1A-057DBF322808",
                    "versionEndExcluding": "6.0.3.1",
                    "versionStartIncluding": "6.0.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B620311B-34A3-48A6-82DF-6F078D7A4493",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B009C22E-30A4-4288-BCF6-C3E81DEAF45A",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "A deserialization of untrusted data vulnernerability exists in rails \u003c 5.2.4.3, rails \u003c 6.0.3.1 that can allow an attacker to unmarshal user-provided objects in MemCacheStore and RedisCacheStore potentially resulting in an RCE."
          },
          {
            "lang": "es",
            "value": "Se presenta una vulnerabilidad de deserializaci\u00f3n de datos no confiables en rails versiones anteriores a 5.2.4.3, rails versiones anteriores a 6.0.3.1, que puede permitir a un atacante desarmar los objetos proporcionados por el usuario en MemCacheStore y RedisCacheStore, lo que podr\u00eda generar un RCE"
          }
        ],
        "id": "CVE-2020-8165",
        "lastModified": "2025-05-09T20:15:36.103",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "HIGH",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 7.5,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 6.4,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2020-06-19T18:15:11.067",
        "references": [
          {
            "source": "support@hackerone.com",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.html"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.html"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Mailing List",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1c"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Exploit",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://hackerone.com/reports/413388"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00022.html"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2020/07/msg00013.html"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released/"
          },
          {
            "source": "support@hackerone.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2020/dsa-4766"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00031.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00034.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://groups.google.com/g/rubyonrails-security/c/bv6fW4S0Y1c"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://hackerone.com/reports/413388"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00022.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2020/07/msg00013.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://security.netapp.com/advisory/ntap-20250509-0002/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://weblog.rubyonrails.org/2020/5/18/Rails-5-2-4-3-and-6-0-3-1-have-been-released/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2020/dsa-4766"
          }
        ],
        "sourceIdentifier": "support@hackerone.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-502"
              }
            ],
            "source": "support@hackerone.com",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-502"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-08T16:15:14+00:00",
      "cve": "CVE-2020-8165",
      "id": "CVE-2020-8165",
      "initial_release_date": "2020-05-18T00:00:00+00:00",
      "product_status:fixed": "1445",
      "product_status:known_affected": "9",
      "product_status:known_not_affected": "3",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "rubygem-activesupport: potentially unintended unmarshalling of user-provided objects in MemCacheStore and RedisCacheStore",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-8165.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.