cve-2020-14382
Vulnerability from cvelistv5
Published
2020-09-16 14:37
Modified
2024-08-04 12:46
Severity ?
Summary
A vulnerability was found in upstream release cryptsetup-2.2.0 where, there's a bug in LUKS2 format validation code, that is effectively invoked on every device/image presenting itself as LUKS2 container. The bug is in segments validation code in file 'lib/luks2/luks2_json_metadata.c' in function hdr_validate_segments(struct crypt_device *cd, json_object *hdr_jobj) where the code does not check for possible overflow on memory allocation used for intervals array (see statement "intervals = malloc(first_backup * sizeof(*intervals));"). Due to the bug, library can be *tricked* to expect such allocation was successful but for far less memory then originally expected. Later it may read data FROM image crafted by an attacker and actually write such data BEYOND allocated memory.
References
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1874712Issue Tracking, Patch, Third Party Advisory
secalert@redhat.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OJTQ4KSVCW2NMSU5WFVPOHY46WMNF4OB/
secalert@redhat.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TD6YSD63LLRRC4WQ7DJLSXWNUCY6FWBM/
secalert@redhat.comhttps://usn.ubuntu.com/4493-1/Third Party Advisory
Impacted products
n/acryptsetup
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T12:46:34.336Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1874712"
          },
          {
            "name": "USN-4493-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/4493-1/"
          },
          {
            "name": "FEDORA-2020-5ed5af6275",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OJTQ4KSVCW2NMSU5WFVPOHY46WMNF4OB/"
          },
          {
            "name": "FEDORA-2020-8c76e12e62",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TD6YSD63LLRRC4WQ7DJLSXWNUCY6FWBM/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "cryptsetup",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "cryptsetup-2.2.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A vulnerability was found in upstream release cryptsetup-2.2.0 where, there\u0027s a bug in LUKS2 format validation code, that is effectively invoked on every device/image presenting itself as LUKS2 container. The bug is in segments validation code in file \u0027lib/luks2/luks2_json_metadata.c\u0027 in function hdr_validate_segments(struct crypt_device *cd, json_object *hdr_jobj) where the code does not check for possible overflow on memory allocation used for intervals array (see statement \"intervals = malloc(first_backup * sizeof(*intervals));\"). Due to the bug, library can be *tricked* to expect such allocation was successful but for far less memory then originally expected. Later it may read data FROM image crafted by an attacker and actually write such data BEYOND allocated memory."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Out-of-bounds write",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-09-25T19:06:14",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1874712"
        },
        {
          "name": "USN-4493-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/4493-1/"
        },
        {
          "name": "FEDORA-2020-5ed5af6275",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OJTQ4KSVCW2NMSU5WFVPOHY46WMNF4OB/"
        },
        {
          "name": "FEDORA-2020-8c76e12e62",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TD6YSD63LLRRC4WQ7DJLSXWNUCY6FWBM/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert@redhat.com",
          "ID": "CVE-2020-14382",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "cryptsetup",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "cryptsetup-2.2.0"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A vulnerability was found in upstream release cryptsetup-2.2.0 where, there\u0027s a bug in LUKS2 format validation code, that is effectively invoked on every device/image presenting itself as LUKS2 container. The bug is in segments validation code in file \u0027lib/luks2/luks2_json_metadata.c\u0027 in function hdr_validate_segments(struct crypt_device *cd, json_object *hdr_jobj) where the code does not check for possible overflow on memory allocation used for intervals array (see statement \"intervals = malloc(first_backup * sizeof(*intervals));\"). Due to the bug, library can be *tricked* to expect such allocation was successful but for far less memory then originally expected. Later it may read data FROM image crafted by an attacker and actually write such data BEYOND allocated memory."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Out-of-bounds write"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1874712",
              "refsource": "MISC",
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1874712"
            },
            {
              "name": "USN-4493-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4493-1/"
            },
            {
              "name": "FEDORA-2020-5ed5af6275",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OJTQ4KSVCW2NMSU5WFVPOHY46WMNF4OB/"
            },
            {
              "name": "FEDORA-2020-8c76e12e62",
              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TD6YSD63LLRRC4WQ7DJLSXWNUCY6FWBM/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2020-14382",
    "datePublished": "2020-09-16T14:37:52",
    "dateReserved": "2020-06-17T00:00:00",
    "dateUpdated": "2024-08-04T12:46:34.336Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2020-14382\",\"sourceIdentifier\":\"secalert@redhat.com\",\"published\":\"2020-09-16T15:15:12.387\",\"lastModified\":\"2023-11-07T03:17:12.223\",\"vulnStatus\":\"Modified\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability was found in upstream release cryptsetup-2.2.0 where, there\u0027s a bug in LUKS2 format validation code, that is effectively invoked on every device/image presenting itself as LUKS2 container. The bug is in segments validation code in file \u0027lib/luks2/luks2_json_metadata.c\u0027 in function hdr_validate_segments(struct crypt_device *cd, json_object *hdr_jobj) where the code does not check for possible overflow on memory allocation used for intervals array (see statement \\\"intervals = malloc(first_backup * sizeof(*intervals));\\\"). Due to the bug, library can be *tricked* to expect such allocation was successful but for far less memory then originally expected. Later it may read data FROM image crafted by an attacker and actually write such data BEYOND allocated memory.\"},{\"lang\":\"es\",\"value\":\"Se encontr\u00f3 una vulnerabilidad en la versi\u00f3n previa cryptsetup-2.2.0 donde se presenta un error en el c\u00f3digo de comprobaci\u00f3n del formato LUKS2, que es invocado efectivamente en cada dispositivo e imagen que se presenta como contenedor de LUKS2.\u0026#xa0;El bug est\u00e1 en el c\u00f3digo de comprobaci\u00f3n de segmentos en el archivo \\\"lib/luks2/luks2_json_metadata.c\\\" en la funci\u00f3n hdr_validate_segments (struct crypt_device *cd, json_object *hdr_jobj) donde el c\u00f3digo no comprueba un posible desbordamiento en la asignaci\u00f3n de memoria usada para una matriz de intervalos (ver sentencia \\\"intervals = malloc(first_backup * sizeof(*intervals));\\\").\u0026#xa0;Debido al bug, la biblioteca puede ser *tricked* para esperar que dicha asignaci\u00f3n haya sido realizada con \u00e9xito, pero para mucha menos memoria de la que se esperaba originalmente.\u0026#xa0;M\u00e1s tarde, puede leer datos DESDE una imagen creada por un atacante y escribir esos datos M\u00c1S ALL\u00c1 de la memoria asignada\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:N/C:P/I:P/A:P\",\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\",\"baseScore\":6.8},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.6,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":true}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cryptsetup_project:cryptsetup:2.2.0:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"A110BD5D-8BDB-4B7D-AD15-42D515179E21\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F4CFF558-3C47-480D-A2F0-BABF26042943\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*\",\"matchCriteriaId\":\"902B8056-9E37-443B-8905-8AA93E2447FB\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"80F0FA5D-8D3B-4C0E-81E2-87998286AF33\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E460AA51-FCDA-46B9-AE97-E6676AA5E194\"}]}]}],\"references\":[{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=1874712\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Issue Tracking\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OJTQ4KSVCW2NMSU5WFVPOHY46WMNF4OB/\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TD6YSD63LLRRC4WQ7DJLSXWNUCY6FWBM/\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://usn.ubuntu.com/4493-1/\",\"source\":\"secalert@redhat.com\",\"tags\":[\"Third Party Advisory\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.