GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

GSD-2020-27846

Vulnerability from gsd - Updated: 2023-12-13 01:22
Details
A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Aliases
Aliases

{
  "GSD": {
    "alias": "CVE-2020-27846",
    "description": "A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.",
    "id": "GSD-2020-27846",
    "references": [
      "https://access.redhat.com/errata/RHSA-2021:1859",
      "https://access.redhat.com/errata/RHSA-2020:5633",
      "https://linux.oracle.com/cve/CVE-2020-27846.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-27846"
      ],
      "details": "A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.",
      "id": "GSD-2020-27846",
      "modified": "2023-12-13T01:22:10.742296Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "secalert@redhat.com",
        "ID": "CVE-2020-27846",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "crewjam/saml",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "grafana-7.3.6, grafana-7.2.3, grafana-6.7.5, github.com/crewjam/saml-0.4.3"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-115"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1907670",
            "refsource": "MISC",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1907670"
          },
          {
            "name": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/",
            "refsource": "MISC",
            "url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/"
          },
          {
            "name": "https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9",
            "refsource": "MISC",
            "url": "https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9"
          },
          {
            "name": "https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise/",
            "refsource": "MISC",
            "url": "https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise/"
          },
          {
            "name": "FEDORA-2020-968067abfa",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOANVQBFQZYI/"
          },
          {
            "name": "FEDORA-2020-64e54abd9f",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77ZMRIC77FEM/"
          },
          {
            "name": "https://security.netapp.com/advisory/ntap-20210205-0002/",
            "refsource": "CONFIRM",
            "url": "https://security.netapp.com/advisory/ntap-20210205-0002/"
          }
        ]
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003cv0.4.3",
          "affected_versions": "All versions before 0.4.3",
          "cvss_v2": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-115",
            "CWE-937"
          ],
          "date": "2021-03-31",
          "description": "A signature verification vulnerability exists in `crewjam/saml.` This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.",
          "fixed_versions": [
            "v0.4.3"
          ],
          "identifier": "CVE-2020-27846",
          "identifiers": [
            "CVE-2020-27846",
            "GHSA-4hq8-gmxx-h6w9"
          ],
          "not_impacted": "All versions starting from 0.4.3",
          "package_slug": "go/github.com/crewjam/saml",
          "pubdate": "2020-12-21",
          "solution": "Upgrade to version 0.4.3 or above.",
          "title": "Misinterpretation of Input",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2020-27846",
            "https://bugzilla.redhat.com/show_bug.cgi?id=1907670",
            "https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise/"
          ],
          "uuid": "54c022b8-4ff5-421b-ad05-1d09bed47ab0",
          "versions": [
            {
              "commit": {
                "sha": "1075c72dc091440f13de7a0ec7712eda9ec08d8d",
                "tags": [
                  "v0.4.3"
                ],
                "timestamp": "20201214083806"
              },
              "number": "v0.4.3"
            }
          ]
        },
        {
          "affected_range": "\u003cv0.4.3",
          "affected_versions": "All versions before 0.4.3",
          "cvss_v2": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-115",
            "CWE-707",
            "CWE-937"
          ],
          "date": "2023-02-07",
          "description": "A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.",
          "fixed_versions": [
            "v0.4.3"
          ],
          "identifier": "CVE-2020-27846",
          "identifiers": [
            "GHSA-4hq8-gmxx-h6w9",
            "CVE-2020-27846"
          ],
          "not_impacted": "All versions starting from 0.4.3",
          "package_slug": "go/github.com/crewjam/saml/samlidp",
          "pubdate": "2021-06-23",
          "solution": "Upgrade to version 0.4.3 or above.",
          "title": "Misinterpretation of Input",
          "urls": [
            "https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9",
            "https://nvd.nist.gov/vuln/detail/CVE-2020-27846",
            "https://github.com/crewjam/saml/commit/da4f1a0612c0a8dd0452cf8b3c7a6518f6b4d053",
            "https://bugzilla.redhat.com/show_bug.cgi?id=1907670",
            "https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise/",
            "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOANVQBFQZYI/",
            "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77ZMRIC77FEM/",
            "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/",
            "https://security.netapp.com/advisory/ntap-20210205-0002/",
            "https://pkg.go.dev/vuln/GO-2021-0058",
            "https://github.com/advisories/GHSA-4hq8-gmxx-h6w9"
          ],
          "uuid": "df773096-d9fe-4e8e-892d-05b09540ae0f",
          "versions": [
            {
              "commit": {
                "sha": "1075c72dc091440f13de7a0ec7712eda9ec08d8d",
                "tags": [
                  "v0.4.3"
                ],
                "timestamp": "20201214083806"
              },
              "number": "v0.4.3"
            }
          ]
        },
        {
          "affected_range": "\u003cv0.4.3",
          "affected_versions": "All versions before 0.4.3",
          "cvss_v2": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-115",
            "CWE-707",
            "CWE-937"
          ],
          "date": "2023-02-07",
          "description": "A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.",
          "fixed_versions": [
            "v0.4.3"
          ],
          "identifier": "CVE-2020-27846",
          "identifiers": [
            "GHSA-4hq8-gmxx-h6w9",
            "CVE-2020-27846"
          ],
          "not_impacted": "All versions starting from 0.4.3",
          "package_slug": "go/github.com/crewjam/saml/samlsp",
          "pubdate": "2021-06-23",
          "solution": "Upgrade to version 0.4.3 or above.",
          "title": "Misinterpretation of Input",
          "urls": [
            "https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9",
            "https://nvd.nist.gov/vuln/detail/CVE-2020-27846",
            "https://github.com/crewjam/saml/commit/da4f1a0612c0a8dd0452cf8b3c7a6518f6b4d053",
            "https://bugzilla.redhat.com/show_bug.cgi?id=1907670",
            "https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise/",
            "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOANVQBFQZYI/",
            "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77ZMRIC77FEM/",
            "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/",
            "https://security.netapp.com/advisory/ntap-20210205-0002/",
            "https://pkg.go.dev/vuln/GO-2021-0058",
            "https://github.com/advisories/GHSA-4hq8-gmxx-h6w9"
          ],
          "uuid": "c4619b5c-2bb6-4e4f-8b96-515e1ced74ab",
          "versions": [
            {
              "commit": {
                "sha": "1075c72dc091440f13de7a0ec7712eda9ec08d8d",
                "tags": [
                  "v0.4.3"
                ],
                "timestamp": "20201214083806"
              },
              "number": "v0.4.3"
            }
          ]
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:grafana:grafana:*:*:*:*:enterprise:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "6.7.5",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:grafana:grafana:*:*:*:*:enterprise:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "7.2.3",
                "versionStartIncluding": "7.0.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:grafana:grafana:*:*:*:*:enterprise:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "7.3.6",
                "versionStartIncluding": "7.3.0",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:saml_project:saml:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "0.4.3",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:a:redhat:openshift_service_mesh:2.0:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2020-27846"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-115"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9"
            },
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1907670",
              "refsource": "MISC",
              "tags": [
                "Issue Tracking",
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1907670"
            },
            {
              "name": "https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise/",
              "refsource": "MISC",
              "tags": [
                "Vendor Advisory"
              ],
              "url": "https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise/"
            },
            {
              "name": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Third Party Advisory"
              ],
              "url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/"
            },
            {
              "name": "FEDORA-2020-64e54abd9f",
              "refsource": "FEDORA",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77ZMRIC77FEM/"
            },
            {
              "name": "FEDORA-2020-968067abfa",
              "refsource": "FEDORA",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOANVQBFQZYI/"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210205-0002/",
              "refsource": "CONFIRM",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://security.netapp.com/advisory/ntap-20210205-0002/"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 10.0,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 10.0,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "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
        }
      },
      "lastModifiedDate": "2021-03-31T15:17Z",
      "publishedDate": "2020-12-21T16:15Z"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

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.

Loading…

Detection rules are retrieved from Rulezet.

Loading…

Loading…

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.


Loading…