GSD-2020-26276

Vulnerability from gsd - Updated: 2023-12-13 01:22
Details
Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go's standard library XML parsing, a valid SAML response may be mutated by an attacker to modify the trusted document. This can result in allowing unverified logins from a SAML IdP. Users that configure Fleet with SSO login may be vulnerable to this issue. This issue is patched in 3.5.1. The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet.
Aliases
Aliases
CVE-2020-26276
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{
  "GSD": {
    "alias": "CVE-2020-26276",
    "description": "Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go\u0027s standard library XML parsing, a valid SAML response may be mutated by an attacker to modify the trusted document. This can result in allowing unverified logins from a SAML IdP. Users that configure Fleet with SSO login may be vulnerable to this issue. This issue is patched in 3.5.1. The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet.",
    "id": "GSD-2020-26276"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-26276"
      ],
      "details": "Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go\u0027s standard library XML parsing, a valid SAML response may be mutated by an attacker to modify the trusted document. This can result in allowing unverified logins from a SAML IdP. Users that configure Fleet with SSO login may be vulnerable to this issue. This issue is patched in 3.5.1. The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet.",
      "id": "GSD-2020-26276",
      "modified": "2023-12-13T01:22:08.904119Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2020-26276",
        "STATE": "PUBLIC",
        "TITLE": "SAML authentication vulnerability in Fleet"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "fleet",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "\u003c 3.5.1"
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            "value": "Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go\u0027s standard library XML parsing, a valid SAML response may be mutated by an attacker to modify the trusted document. This can result in allowing unverified logins from a SAML IdP. Users that configure Fleet with SSO login may be vulnerable to this issue. This issue is patched in 3.5.1. The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet."
          }
        ]
      },
      "impact": {
        "cvss": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 10,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-290: Authentication Bypass by Spoofing"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx",
            "refsource": "CONFIRM",
            "url": "https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx"
          },
          {
            "name": "https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607",
            "refsource": "MISC",
            "url": "https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607"
          },
          {
            "name": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020",
            "refsource": "MISC",
            "url": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020"
          },
          {
            "name": "https://github.com/mattermost/xml-roundtrip-validator",
            "refsource": "MISC",
            "url": "https://github.com/mattermost/xml-roundtrip-validator"
          },
          {
            "name": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities",
            "refsource": "MISC",
            "url": "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-w3wf-cfx3-6gcx",
        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003cv3.5.1",
          "affected_versions": "All versions before 3.5.1",
          "cvss_v2": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "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-290",
            "CWE-937"
          ],
          "date": "2022-02-11",
          "description": "Fleet is an open source osquery manager. In Fleet, due to issues in Go\u0027s standard library XML parsing, a valid SAML response may be mutated by an attacker to modify the trusted document. This can result in allowing unverified logins from a SAML IdP. Users that configure Fleet with SSO login may be vulnerable to this issue. This issue is patched The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to is not possible, users should disable SSO authentication in Fleet.",
          "fixed_versions": [
            "v3.5.1"
          ],
          "identifier": "CVE-2020-26276",
          "identifiers": [
            "GHSA-w3wf-cfx3-6gcx",
            "CVE-2020-26276"
          ],
          "not_impacted": "All versions starting from 3.5.1",
          "package_slug": "go/github.com/fleetdm/fleet/v4",
          "pubdate": "2022-02-11",
          "solution": "Upgrade to version 3.5.1 or above.",
          "title": "Authentication Bypass by Spoofing",
          "urls": [
            "https://github.com/fleetdm/fleet/security/advisories/GHSA-w3wf-cfx3-6gcx",
            "https://nvd.nist.gov/vuln/detail/CVE-2020-26276",
            "https://github.com/fleetdm/fleet/commit/57812a532e5f749c8e18c6f6a652eca65c083607",
            "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020",
            "https://github.com/mattermost/xml-roundtrip-validator",
            "https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities",
            "https://github.com/advisories/GHSA-w3wf-cfx3-6gcx"
          ],
          "uuid": "6c208398-0083-4500-afe2-77e5055d1a09",
          "versions": [
            {
              "commit": {
                "sha": "55a2aa2c955a99483b730e60207e4afada7bda8a",
                "tags": [
                  "3.5.1"
                ],
                "timestamp": "20201215024503"
              },
              "number": "v3.5.1"
            }
          ]
        }
      ]
    },
    "nvd.nist.gov": {
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        "nodes": [
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                "cpe_name": [],
                "versionEndExcluding": "3.5.1",
                "vulnerable": true
              }
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            "operator": "OR"
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        "description": {
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              "value": "Fleet is an open source osquery manager. In Fleet before version 3.5.1, due to issues in Go\u0027s standard library XML parsing, a valid SAML response may be mutated by an attacker to modify the trusted document. This can result in allowing unverified logins from a SAML IdP. Users that configure Fleet with SSO login may be vulnerable to this issue. This issue is patched in 3.5.1. The fix was made using https://github.com/mattermost/xml-roundtrip-validator If upgrade to 3.5.1 is not possible, users should disable SSO authentication in Fleet."
            }
          ]
        },
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              "name": "https://github.com/fleetdm/fleet/blob/master/CHANGELOG.md#fleet-351-dec-14-2020",
              "refsource": "MISC",
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 6.8,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 6.4,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "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": "2020-12-18T19:11Z",
      "publishedDate": "2020-12-17T20:15Z"
    }
  }
}



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