CVE-2020-8905 (GCVE-0-2020-8905)

Vulnerability from cvelistv5 – Published: 2020-08-12 18:20 – Updated: 2024-09-17 00:06
VLAI?
Title
Confidential Information Disclosure vulnerability in Asylo
Summary
A buffer length validation vulnerability in Asylo versions prior to 0.6.0 allows an attacker to read data they should not have access to. The 'enc_untrusted_recvfrom' function generates a return value which is deserialized by 'MessageReader', and copied into three different 'extents'. The length of the third 'extents' is controlled by the outside world, and not verified on copy, allowing the attacker to force Asylo to copy trusted memory data into an untrusted buffer of significantly small length.. We recommend updating Asylo to version 0.6.0 or later.
Severity ?
2.8 (Low)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
Google LLC Asylo Affected: stable , < 0.6.0 (custom)
Create a notification for this product.
Credits
Qinkun Bao, Zhaofeng Chen, Mingshen Sun, and Kang Li from Baidu Security
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T10:12:11.061Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/google/asylo/commit/299f804acbb95a612ab7c504d25ab908aa59ae93"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Asylo",
          "vendor": "Google LLC",
          "versions": [
            {
              "lessThan": "0.6.0",
              "status": "affected",
              "version": "stable",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Qinkun Bao, Zhaofeng Chen, Mingshen Sun, and Kang Li from Baidu Security"
        }
      ],
      "datePublic": "2020-07-22T00:00:00",
      "descriptions": [
        {
          "lang": "en",
          "value": "A buffer length validation vulnerability in Asylo versions prior to 0.6.0 allows an attacker to read data they should not have access to. The \u0027enc_untrusted_recvfrom\u0027 function generates a return value which is deserialized by \u0027MessageReader\u0027, and copied into three different \u0027extents\u0027. The length of the third \u0027extents\u0027 is controlled by the outside world, and not verified on copy, allowing the attacker to force Asylo to copy trusted memory data into an untrusted buffer of significantly small length.. We recommend updating Asylo to version 0.6.0 or later."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 2.8,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-120",
              "description": "CWE-120 Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-08-12T18:20:13",
        "orgId": "14ed7db2-1595-443d-9d34-6215bf890778",
        "shortName": "Google"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/google/asylo/commit/299f804acbb95a612ab7c504d25ab908aa59ae93"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Confidential Information Disclosure vulnerability in Asylo",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@google.com",
          "DATE_PUBLIC": "2020-07-22T00:22:00.000Z",
          "ID": "CVE-2020-8905",
          "STATE": "PUBLIC",
          "TITLE": "Confidential Information Disclosure vulnerability in Asylo"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Asylo",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_name": "stable",
                            "version_value": "0.6.0"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Google LLC"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "Qinkun Bao, Zhaofeng Chen, Mingshen Sun, and Kang Li from Baidu Security"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A buffer length validation vulnerability in Asylo versions prior to 0.6.0 allows an attacker to read data they should not have access to. The \u0027enc_untrusted_recvfrom\u0027 function generates a return value which is deserialized by \u0027MessageReader\u0027, and copied into three different \u0027extents\u0027. The length of the third \u0027extents\u0027 is controlled by the outside world, and not verified on copy, allowing the attacker to force Asylo to copy trusted memory data into an untrusted buffer of significantly small length.. We recommend updating Asylo to version 0.6.0 or later."
            }
          ]
        },
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": {
          "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 2.8,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-120 Buffer Overflow"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/google/asylo/commit/299f804acbb95a612ab7c504d25ab908aa59ae93",
              "refsource": "CONFIRM",
              "url": "https://github.com/google/asylo/commit/299f804acbb95a612ab7c504d25ab908aa59ae93"
            }
          ]
        },
        "source": {
          "discovery": "EXTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778",
    "assignerShortName": "Google",
    "cveId": "CVE-2020-8905",
    "datePublished": "2020-08-12T18:20:13.466578Z",
    "dateReserved": "2020-02-12T00:00:00",
    "dateUpdated": "2024-09-17T00:06:27.121Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2020-8905\",\"sourceIdentifier\":\"cve-coordination@google.com\",\"published\":\"2020-08-12T19:15:14.670\",\"lastModified\":\"2024-11-21T05:39:39.820\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A buffer length validation vulnerability in Asylo versions prior to 0.6.0 allows an attacker to read data they should not have access to. The \u0027enc_untrusted_recvfrom\u0027 function generates a return value which is deserialized by \u0027MessageReader\u0027, and copied into three different \u0027extents\u0027. The length of the third \u0027extents\u0027 is controlled by the outside world, and not verified on copy, allowing the attacker to force Asylo to copy trusted memory data into an untrusted buffer of significantly small length.. We recommend updating Asylo to version 0.6.0 or later.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad de comprobaci\u00f3n de longitud del b\u00fafer en Asylo versiones anteriores a 0.6.0, permite a un atacante leer datos a los que no deber\u00eda tener acceso. La funci\u00f3n \\\"enc_untrusted_recvfrom\\\" genera un valor de retorno que es deserializado por \\\"lMessageReader\\\" y copiado en tres \\\"extents\\\" diferentes. La longitud de los \u0027\u0027extents\\\" de terceros es controlada por el mundo exterior y no es verificada en la copia, permitiendo al atacante forzar a Asylo a copiar datos de memoria confiables en un b\u00fafer no confiable de longitud significativamente peque\u00f1a. Recomendamos actualizar Asylo en las versiones 0.6. 0 o posteriores\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cve-coordination@google.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N\",\"baseScore\":2.8,\"baseSeverity\":\"LOW\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.1,\"impactScore\":1.4},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:S/C:P/I:N/A:N\",\"baseScore\":4.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"cve-coordination@google.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-120\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-120\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:google:asylo:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"0.6.0\",\"matchCriteriaId\":\"2E43ACF0-4DFF-4A7A-BC8B-90E067F13206\"}]}]}],\"references\":[{\"url\":\"https://github.com/google/asylo/commit/299f804acbb95a612ab7c504d25ab908aa59ae93\",\"source\":\"cve-coordination@google.com\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/google/asylo/commit/299f804acbb95a612ab7c504d25ab908aa59ae93\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party Advisory\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.