ubuntu-cve-2022-28736
Vulnerability from osv_ubuntu
Published
2023-07-20 01:15
Modified
2025-10-24 04:53
Summary
Details

There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved.

Severity
6.4 (Medium)
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.34.24+2.02~beta2-9ubuntu1.21"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "grub2-signed",
        "purl": "pkg:deb/ubuntu/grub2-signed@1.34.24?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.22",
        "1.23",
        "1.24",
        "1.25",
        "1.26",
        "1.27",
        "1.30",
        "1.31",
        "1.32",
        "1.33",
        "1.34",
        "1.34.1",
        "1.34.2",
        "1.34.3",
        "1.34.4",
        "1.34.5",
        "1.34.6",
        "1.34.7",
        "1.34.8",
        "1.34.9",
        "1.34.13",
        "1.34.14",
        "1.34.16",
        "1.34.17",
        "1.34.18",
        "1.34.20",
        "1.34.22",
        "1.34.24"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.167~16.04.6+2.04-1ubuntu44.1.2"
          },
          {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.167~16.04.6+2.04-1ubuntu44.1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "grub2-signed",
        "purl": "pkg:deb/ubuntu/grub2-signed@1.167~16.04.6?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.55",
        "1.56",
        "1.57",
        "1.58",
        "1.59",
        "1.61",
        "1.62",
        "1.63",
        "1.64",
        "1.65",
        "1.66",
        "1.66.1",
        "1.66.2",
        "1.66.6",
        "1.66.7",
        "1.66.8",
        "1.66.9",
        "1.66.11",
        "1.66.12",
        "1.66.14",
        "1.66.15",
        "1.66.16",
        "1.66.17",
        "1.66.18",
        "1.66.19",
        "1.66.20",
        "1.66.21",
        "1.66.22",
        "1.66.23",
        "1.66.26",
        "1.66.27",
        "1.66.28",
        "1.66.29",
        "1.167~16.04.1",
        "1.167~16.04.2",
        "1.167~16.04.4",
        "1.167~16.04.6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.04-1ubuntu44.1.2"
          },
          {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.04-1ubuntu44.1.2"
          },
          {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.04-1ubuntu44.1.2"
          },
          {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.04-1ubuntu44.1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "grub2-unsigned",
        "purl": "pkg:deb/ubuntu/grub2-unsigned@2.04-1ubuntu44.1.2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.04-1ubuntu44",
        "2.04-1ubuntu44.1",
        "2.04-1ubuntu44.1.2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.187.3~18.04.1+2.06-2ubuntu14.1"
          },
          {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.187.3~18.04.1+2.06-2ubuntu14.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "grub2-signed",
        "purl": "pkg:deb/ubuntu/grub2-signed@1.187.3~18.04.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.187.3~18.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.85",
        "1.86",
        "1.87",
        "1.89",
        "1.91",
        "1.92",
        "1.93",
        "1.93.1",
        "1.93.2",
        "1.93.3",
        "1.93.4",
        "1.93.5",
        "1.93.7",
        "1.93.8",
        "1.93.10",
        "1.93.11",
        "1.93.13",
        "1.93.14",
        "1.93.15",
        "1.93.16",
        "1.93.18",
        "1.93.19",
        "1.93.20",
        "1.93.21",
        "1.93.22",
        "1.93.24",
        "1.167~18.04.1",
        "1.167~18.04.3",
        "1.167~18.04.5",
        "1.173.2~18.04.1",
        "1.187.2~18.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.06-2ubuntu14.1"
          },
          {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.06-2ubuntu14.1"
          },
          {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.06-2ubuntu14.1"
          },
          {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.06-2ubuntu14.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "grub2-unsigned",
        "purl": "pkg:deb/ubuntu/grub2-unsigned@2.06-2ubuntu14.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.06-2ubuntu14.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.04-1ubuntu44",
        "2.04-1ubuntu44.1",
        "2.04-1ubuntu44.1.2",
        "2.04-1ubuntu47.4",
        "2.06-2ubuntu14"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.187.3~20.04.1+2.06-2ubuntu14.1"
          },
          {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.187.3~20.04.1+2.06-2ubuntu14.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "grub2-signed",
        "purl": "pkg:deb/ubuntu/grub2-signed@1.187.3~20.04.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.187.3~20.04.1"
            }
          ],
          "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"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.06-2ubuntu14.1"
          },
          {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.06-2ubuntu14.1"
          },
          {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.06-2ubuntu14.1"
          },
          {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.06-2ubuntu14.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "grub2-unsigned",
        "purl": "pkg:deb/ubuntu/grub2-unsigned@2.06-2ubuntu14.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.06-2ubuntu14.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.04-1ubuntu44",
        "2.04-1ubuntu44.2",
        "2.04-1ubuntu47.4",
        "2.04-1ubuntu47.5",
        "2.06-2ubuntu14"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "grub-efi-amd64-signed",
            "binary_version": "1.187.3~22.04.1+2.06-2ubuntu14.1"
          },
          {
            "binary_name": "grub-efi-arm64-signed",
            "binary_version": "1.187.3~22.04.1+2.06-2ubuntu14.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "grub2-signed",
        "purl": "pkg:deb/ubuntu/grub2-signed@1.187.3~22.04.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.187.3~22.04.1"
            }
          ],
          "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"
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    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.06-2ubuntu14.1"
          },
          {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.06-2ubuntu14.1"
          },
          {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.06-2ubuntu14.1"
          },
          {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.06-2ubuntu14.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "grub2-unsigned",
        "purl": "pkg:deb/ubuntu/grub2-unsigned@2.06-2ubuntu14.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.06-2ubuntu14.1"
            }
          ],
          "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"
      ]
    }
  ],
  "aliases": [],
  "details": "There\u0027s a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn\u0027t support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2\u0027s memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved.",
  "id": "UBUNTU-CVE-2022-28736",
  "modified": "2025-10-24T04:53:38Z",
  "published": "2023-07-20T01:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-28736"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2022/06/07/5"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6355-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2022-28736"
    }
  ],
  "related": [
    "USN-6355-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/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"
    }
  ],
  "upstream": [
    "CVE-2022-28736"
  ]
}



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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.