usn-6410-1
Vulnerability from osv_ubuntu
Published
2023-10-04 01:31
Modified
2026-04-27 14:11
Summary
grub2-signed, grub2-unsigned vulnerabilities
Details

It was discovered that a specially crafted file system image could cause a heap-based out-of-bounds write. A local attacker could potentially use this to perform arbitrary code execution bypass and bypass secure boot protections. (CVE-2023-4692)

It was discovered that a specially crafted file system image could cause an out-of-bounds read. A physically-present attacker could possibly use this to leak sensitive information to the GRUB pager. (CVE-2023-4693)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2023-4692",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2023-4693",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.187.6~20.04.1+2.06-2ubuntu14.4"
          },
          {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.187.6~20.04.1+2.06-2ubuntu14.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "grub2-signed",
        "purl": "pkg:deb/ubuntu/grub2-signed@1.187.6~20.04.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.187.6~20.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.128",
        "1.129",
        "1.130",
        "1.131",
        "1.133",
        "1.134",
        "1.135",
        "1.136",
        "1.137",
        "1.138",
        "1.139",
        "1.140",
        "1.141",
        "1.142",
        "1.142.1",
        "1.142.3",
        "1.142.4",
        "1.142.5",
        "1.142.6",
        "1.142.8",
        "1.142.9",
        "1.142.10",
        "1.142.11",
        "1.167",
        "1.167.2",
        "1.173.2~20.04.1",
        "1.173.4",
        "1.187.2~20.04.2",
        "1.187.3~20.04.1",
        "1.187.4~20.04.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2023-4692",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2023-4693",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.187.6+2.06-2ubuntu14.4"
          },
          {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.187.6+2.06-2ubuntu14.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "grub2-signed",
        "purl": "pkg:deb/ubuntu/grub2-signed@1.187.6?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.187.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.173",
        "1.174",
        "1.176",
        "1.177",
        "1.178",
        "1.179",
        "1.180",
        "1.182~22.04.1",
        "1.187.2",
        "1.187.3~22.04.1",
        "1.187.4~22.04.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2023-4692",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2023-4693",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.06-2ubuntu14.4"
          },
          {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.06-2ubuntu14.4"
          },
          {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.06-2ubuntu14.4"
          },
          {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.06-2ubuntu14.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "grub2-unsigned",
        "purl": "pkg:deb/ubuntu/grub2-unsigned@2.06-2ubuntu14.4?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.06-2ubuntu14.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.04-1ubuntu47",
        "2.04-1ubuntu48",
        "2.06-2ubuntu3",
        "2.06-2ubuntu4",
        "2.06-2ubuntu5",
        "2.06-2ubuntu6",
        "2.06-2ubuntu7",
        "2.06-2ubuntu10",
        "2.06-2ubuntu14",
        "2.06-2ubuntu14.1",
        "2.06-2ubuntu14.2"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that a specially crafted file system image could cause a\nheap-based out-of-bounds write. A local attacker could potentially use this\nto perform arbitrary code execution bypass and bypass secure boot\nprotections. (CVE-2023-4692)\n\nIt was discovered that a specially crafted file system image could cause an\nout-of-bounds read. A physically-present attacker could possibly use this\nto leak sensitive information to the GRUB pager. (CVE-2023-4693)\n",
  "id": "USN-6410-1",
  "modified": "2026-04-27T14:11:31Z",
  "published": "2023-10-04T01:31:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6410-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-4692"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-4693"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "grub2-signed, grub2-unsigned vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2023-4692",
    "UBUNTU-CVE-2023-4693"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.