CVE-2019-20908 (GCVE-0-2019-20908)

Vulnerability from cvelistv5 – Published: 2020-07-15 21:24 – Updated: 2024-08-05 02:53
VLAI?
Summary
An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032.
Severity ?
No CVSS data available.
CWE
  • n/a
Assigner
References
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T02:53:09.612Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4"
          },
          {
            "name": "[oss-security] 20200720 Re: Re: lockdown bypass on ubuntu 18.04\u0027s 4.15 kernel for loading unsigned modules",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2020/07/20/6"
          },
          {
            "name": "USN-4427-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/4427-1/"
          },
          {
            "name": "[oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2020/07/29/3"
          },
          {
            "name": "[oss-security] 20200730 Re: UEFI SecureBoot bypass fixes rolled out to kernels below radar",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2020/07/30/3"
          },
          {
            "name": "[oss-security] 20200730 UEFI SecureBoot bypass fixes rolled out to kernels below radar",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2020/07/30/2"
          },
          {
            "name": "USN-4439-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/4439-1/"
          },
          {
            "name": "USN-4426-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/4426-1/"
          },
          {
            "name": "USN-4440-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://usn.ubuntu.com/4440-1/"
          },
          {
            "name": "openSUSE-SU-2020:1153",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-08-06T17:06:18.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4"
        },
        {
          "name": "[oss-security] 20200720 Re: Re: lockdown bypass on ubuntu 18.04\u0027s 4.15 kernel for loading unsigned modules",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2020/07/20/6"
        },
        {
          "name": "USN-4427-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/4427-1/"
        },
        {
          "name": "[oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2020/07/29/3"
        },
        {
          "name": "[oss-security] 20200730 Re: UEFI SecureBoot bypass fixes rolled out to kernels below radar",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2020/07/30/3"
        },
        {
          "name": "[oss-security] 20200730 UEFI SecureBoot bypass fixes rolled out to kernels below radar",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2020/07/30/2"
        },
        {
          "name": "USN-4439-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/4439-1/"
        },
        {
          "name": "USN-4426-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/4426-1/"
        },
        {
          "name": "USN-4440-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://usn.ubuntu.com/4440-1/"
        },
        {
          "name": "openSUSE-SU-2020:1153",
          "tags": [
            "vendor-advisory",
            "x_refsource_SUSE"
          ],
          "url": "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2019-20908",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh",
              "refsource": "MISC",
              "url": "https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh"
            },
            {
              "name": "https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html",
              "refsource": "MISC",
              "url": "https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html"
            },
            {
              "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e",
              "refsource": "MISC",
              "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e"
            },
            {
              "name": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4",
              "refsource": "MISC",
              "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4"
            },
            {
              "name": "[oss-security] 20200720 Re: Re: lockdown bypass on ubuntu 18.04\u0027s 4.15 kernel for loading unsigned modules",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2020/07/20/6"
            },
            {
              "name": "USN-4427-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4427-1/"
            },
            {
              "name": "[oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2020/07/29/3"
            },
            {
              "name": "[oss-security] 20200730 Re: UEFI SecureBoot bypass fixes rolled out to kernels below radar",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2020/07/30/3"
            },
            {
              "name": "[oss-security] 20200730 UEFI SecureBoot bypass fixes rolled out to kernels below radar",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2020/07/30/2"
            },
            {
              "name": "USN-4439-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4439-1/"
            },
            {
              "name": "USN-4426-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4426-1/"
            },
            {
              "name": "USN-4440-1",
              "refsource": "UBUNTU",
              "url": "https://usn.ubuntu.com/4440-1/"
            },
            {
              "name": "openSUSE-SU-2020:1153",
              "refsource": "SUSE",
              "url": "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2019-20908",
    "datePublished": "2020-07-15T21:24:27.000Z",
    "dateReserved": "2020-07-15T00:00:00.000Z",
    "dateUpdated": "2024-08-05T02:53:09.612Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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.