USN-4985-1 (UBUNTU-CVE-2020-24489)

Vulnerability from osv_ubuntu – Published: 2021-06-09 05:22 – Updated: 2026-06-29 10:52 – Source website
VLAI
Summary
intel-microcode vulnerabilities
Details

It was discovered that some Intel processors may not properly invalidate cache entries used by Intel Virtualization Technology for Directed I/O (VT-d). This may allow a local user to perform a privilege escalation attack. (CVE-2020-24489)

Joseph Nuzman discovered that some Intel processors may not properly apply EIBRS mitigations (originally developed for CVE-2017-5715) and hence may allow unauthorized memory reads via sidechannel attacks. A local attacker could use this to expose sensitive information, including kernel memory. (CVE-2020-24511)

Travis Downs discovered that some Intel processors did not properly flush cache-lines for trivial-data values. This may allow an unauthorized user to infer the presence of these trivial-data-cache-lines via timing sidechannel attacks. A local attacker could use this to expose sensitive information. (CVE-2020-24512)

It was discovered that certain Intel Atom processors could expose memory contents stored in microarchitectural buffers. A local attacker could use this to expose sensitive information. (CVE-2020-24513)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
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              "id": "CVE-2020-24489",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
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                  "score": "high",
                  "type": "Ubuntu"
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            },
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                  "type": "CVSS_V3"
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                {
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            },
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              "id": "CVE-2020-24513",
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    {
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        "cves_map": {
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              "id": "CVE-2020-24489",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-24511",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-24512",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-24513",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
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        }
      },
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        "binaries": [
          {
            "binary_name": "intel-microcode",
            "binary_version": "3.20210608.0ubuntu0.16.04.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "intel-microcode",
        "purl": "pkg:deb/ubuntu/intel-microcode@3.20210608.0ubuntu0.16.04.1+esm1?arch=source\u0026distro=esm-infra/xenial"
      },
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                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-24511",
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                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-24512",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-24513",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "intel-microcode",
            "binary_version": "3.20210608.0ubuntu0.18.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "intel-microcode",
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      },
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            {
              "id": "CVE-2020-24489",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-24511",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-24512",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-24513",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/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": "intel-microcode",
            "binary_version": "3.20210608.0ubuntu0.20.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "intel-microcode",
        "purl": "pkg:deb/ubuntu/intel-microcode@3.20210608.0ubuntu0.20.04.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
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            {
              "introduced": "0"
            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.20190918.1ubuntu1",
        "3.20191115.1ubuntu1",
        "3.20191115.1ubuntu2",
        "3.20191115.1ubuntu3",
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        "3.20200609.0ubuntu0.20.04.1",
        "3.20200609.0ubuntu0.20.04.2",
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        "3.20201110.0ubuntu0.20.04.2",
        "3.20210216.0ubuntu0.20.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that some Intel processors may not properly invalidate\ncache entries used by Intel Virtualization Technology for Directed I/O\n(VT-d). This may allow a local user to perform a privilege escalation\nattack. (CVE-2020-24489)\n\nJoseph Nuzman discovered that some Intel processors may not properly apply\nEIBRS mitigations (originally developed for CVE-2017-5715) and hence may\nallow unauthorized memory reads via sidechannel attacks. A local attacker\ncould use this to expose sensitive information, including kernel\nmemory. (CVE-2020-24511)\n\nTravis Downs discovered that some Intel processors did not properly flush\ncache-lines for trivial-data values. This may allow an unauthorized user to\ninfer the presence of these trivial-data-cache-lines via timing sidechannel\nattacks. A local attacker could use this to expose sensitive\ninformation. (CVE-2020-24512)\n\nIt was discovered that certain Intel Atom processors could expose memory\ncontents stored in microarchitectural buffers. A local attacker could use\nthis to expose sensitive information. (CVE-2020-24513)\n",
  "id": "USN-4985-1",
  "modified": "2026-06-29T10:52:50Z",
  "published": "2021-06-09T05:22:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4985-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-24489"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-24511"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-24512"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-24513"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "intel-microcode vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2020-24489",
    "UBUNTU-CVE-2020-24511",
    "UBUNTU-CVE-2020-24512",
    "UBUNTU-CVE-2020-24513"
  ]
}



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