gsd-2021-29441
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server.
Aliases
Aliases
CVE-2021-29441


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-29441",
    "description": "Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server.",
    "id": "GSD-2021-29441"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-29441"
      ],
      "details": "Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server.",
      "id": "GSD-2021-29441",
      "modified": "2023-12-13T01:23:36.794687Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2021-29441",
        "STATE": "PUBLIC",
        "TITLE": "Authentication bypass"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "nacos",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "\u003c 1.4.1"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "alibaba"
            }
          ]
        }
      },
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      "data_type": "CVE",
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            "value": "Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server."
          }
        ]
      },
      "impact": {
        "cvss": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-290 Authentication Bypass by Spoofing"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/alibaba/nacos/issues/4701",
            "refsource": "MISC",
            "url": "https://github.com/alibaba/nacos/issues/4701"
          },
          {
            "name": "https://github.com/advisories/GHSA-36hp-jr8h-556f",
            "refsource": "CONFIRM",
            "url": "https://github.com/advisories/GHSA-36hp-jr8h-556f"
          },
          {
            "name": "https://github.com/alibaba/nacos/pull/4703",
            "refsource": "MISC",
            "url": "https://github.com/alibaba/nacos/pull/4703"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-36hp-jr8h-556f",
        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "(,1.4.1)",
          "affected_versions": "All versions before 1.4.1",
          "cvss_v2": "AV:N/AC:L/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": "2021-05-07",
          "description": "Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos, when configured to use authentication `-Dnacos.core.auth.enabled=true` it uses the `AuthFilter` servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server.",
          "fixed_versions": [
            "1.4.1"
          ],
          "identifier": "CVE-2021-29441",
          "identifiers": [
            "CVE-2021-29441",
            "GHSA-36hp-jr8h-556f"
          ],
          "not_impacted": "All versions starting from 1.4.1",
          "package_slug": "maven/com.alibaba.nacos/nacos-api",
          "pubdate": "2021-04-27",
          "solution": "Upgrade to version 1.4.1 or above.",
          "title": "Authentication Bypass by Spoofing",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-29441"
          ],
          "uuid": "ada86c5f-18a6-494d-b750-39f1d792753d"
        },
        {
          "affected_range": "(,1.4.1)",
          "affected_versions": "All versions before 1.4.1",
          "cvss_v2": "AV:N/AC:L/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": "2021-05-10",
          "description": "Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server.",
          "fixed_versions": [
            "1.4.1"
          ],
          "identifier": "CVE-2021-29441",
          "identifiers": [
            "GHSA-36hp-jr8h-556f",
            "CVE-2021-29441"
          ],
          "not_impacted": "All versions starting from 1.4.1",
          "package_slug": "maven/com.alibaba.nacos/nacos-common",
          "pubdate": "2021-04-27",
          "solution": "Upgrade to version 1.4.1 or above.",
          "title": "Authentication Bypass by Spoofing",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-29441",
            "https://github.com/alibaba/nacos/issues/4701",
            "https://github.com/alibaba/nacos/pull/4703",
            "https://github.com/advisories/GHSA-36hp-jr8h-556f"
          ],
          "uuid": "8b7fd1cc-c554-4039-9c15-badc7a8d83be"
        }
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
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        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:alibaba:nacos:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "1.4.1",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "security-advisories@github.com",
          "ID": "CVE-2021-29441"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce authentication. This filter has a backdoor that enables Nacos servers to bypass this filter and therefore skip authentication checks. This mechanism relies on the user-agent HTTP header so it can be easily spoofed. This issue may allow any user to carry out any administrative tasks on the Nacos server."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-290"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/alibaba/nacos/issues/4701",
              "refsource": "MISC",
              "tags": [
                "Exploit",
                "Third Party Advisory"
              ],
              "url": "https://github.com/alibaba/nacos/issues/4701"
            },
            {
              "name": "https://github.com/advisories/GHSA-36hp-jr8h-556f",
              "refsource": "CONFIRM",
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              ],
              "url": "https://github.com/advisories/GHSA-36hp-jr8h-556f"
            },
            {
              "name": "https://github.com/alibaba/nacos/pull/4703",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/alibaba/nacos/pull/4703"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "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,
          "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": "2021-05-07T23:09Z",
      "publishedDate": "2021-04-27T21:15Z"
    }
  }
}


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