GSD-2021-32827

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
MockServer is open source software which enables easy mocking of any system you integrate with via HTTP or HTTPS. An attacker that can trick a victim into visiting a malicious site while running MockServer locally, will be able to run arbitrary code on the MockServer machine. With an overly broad default CORS configuration MockServer allows any site to send cross-site requests. Additionally, MockServer allows you to create dynamic expectations using Javascript or Velocity templates. Both engines may allow an attacker to execute arbitrary code on-behalf of MockServer. By combining these two issues (Overly broad CORS configuration + Script injection), an attacker could serve a malicious page so that if a developer running MockServer visits it, they will get compromised. For more details including a PoC see the referenced GHSL-2021-059.
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Aliases
CVE-2021-32827
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{
  "GSD": {
    "alias": "CVE-2021-32827",
    "description": "MockServer is open source software which enables easy mocking of any system you integrate with via HTTP or HTTPS. An attacker that can trick a victim into visiting a malicious site while running MockServer locally, will be able to run arbitrary code on the MockServer machine. With an overly broad default CORS configuration MockServer allows any site to send cross-site requests. Additionally, MockServer allows you to create dynamic expectations using Javascript or Velocity templates. Both engines may allow an attacker to execute arbitrary code on-behalf of MockServer. By combining these two issues (Overly broad CORS configuration + Script injection), an attacker could serve a malicious page so that if a developer running MockServer visits it, they will get compromised. For more details including a PoC see the referenced GHSL-2021-059.",
    "id": "GSD-2021-32827"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-32827"
      ],
      "details": "MockServer is open source software which enables easy mocking of any system you integrate with via HTTP or HTTPS. An attacker that can trick a victim into visiting a malicious site while running MockServer locally, will be able to run arbitrary code on the MockServer machine. With an overly broad default CORS configuration MockServer allows any site to send cross-site requests. Additionally, MockServer allows you to create dynamic expectations using Javascript or Velocity templates. Both engines may allow an attacker to execute arbitrary code on-behalf of MockServer. By combining these two issues (Overly broad CORS configuration + Script injection), an attacker could serve a malicious page so that if a developer running MockServer visits it, they will get compromised. For more details including a PoC see the referenced GHSL-2021-059.",
      "id": "GSD-2021-32827",
      "modified": "2023-12-13T01:23:08.999945Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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        "ID": "CVE-2021-32827",
        "STATE": "PUBLIC",
        "TITLE": "Arbitrary code execution in MockServer"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "mockserver",
                    "version": {
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                        {
                          "version_value": "all"
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          }
        ]
      },
      "generator": {
        "engine": "Vulnogram 0.0.9"
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      "impact": {
        "cvss": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://securitylab.github.com/advisories/GHSL-2021-059-mockserver/",
            "refsource": "CONFIRM",
            "url": "https://securitylab.github.com/advisories/GHSL-2021-059-mockserver/"
          },
          {
            "name": "https://www.oracle.com/security-alerts/cpujan2022.html",
            "refsource": "MISC",
            "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
          }
        ]
      },
      "source": {
        "advisory": "GHSL-2021-059",
        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "(,5.11.2]",
          "affected_versions": "All versions up to 5.11.2",
          "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:R/S:C/C:H/I:H/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-74",
            "CWE-78",
            "CWE-937"
          ],
          "date": "2021-08-30",
          "description": "MockServer is open source software which enables easy mocking of any system you integrate with via HTTP or HTTPS. An attacker that can trick a victim into visiting a malicious site while running MockServer locally, will be able to run arbitrary code on the MockServer machine. With an overly broad default CORS configuration MockServer allows any site to send cross-site requests. Additionally, MockServer allows you to create dynamic expectations using Javascript or Velocity templates. Both engines may allow an attacker to execute arbitrary code on-behalf of MockServer. By combining these two issues (Overly broad CORS configuration + Script injection), an attacker could serve a malicious page so that if a developer running MockServer visits it, they will get compromised. For more details including a PoC see the referenced GHSL-2021-059.",
          "fixed_versions": [],
          "identifier": "CVE-2021-32827",
          "identifiers": [
            "GHSA-v3cg-h3f6-2242",
            "CVE-2021-32827"
          ],
          "not_impacted": "",
          "package_slug": "maven/org.mock-server/mockserver",
          "pubdate": "2021-08-30",
          "solution": "Unfortunately, there is no solution available yet.",
          "title": "Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2021-32827",
            "https://securitylab.github.com/advisories/GHSL-2021-059-mockserver/",
            "https://github.com/advisories/GHSA-v3cg-h3f6-2242"
          ],
          "uuid": "62a70162-9618-448b-9a31-5eae8e17a7b9"
        }
      ]
    },
    "nvd.nist.gov": {
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        "nodes": [
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            "children": [],
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                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          },
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*",
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        "description": {
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            }
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                  "value": "CWE-79"
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          "reference_data": [
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              "name": "https://securitylab.github.com/advisories/GHSL-2021-059-mockserver/",
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              "url": "https://www.oracle.com/security-alerts/cpujan2022.html"
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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": true
        },
        "baseMetricV3": {
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            "attackVector": "NETWORK",
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            "confidentialityImpact": "HIGH",
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            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
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          "exploitabilityScore": 2.8,
          "impactScore": 6.0
        }
      },
      "lastModifiedDate": "2022-07-02T18:21Z",
      "publishedDate": "2021-08-16T21:15Z"
    }
  }
}


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  • 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.
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  • 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.



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