ubuntu-cve-2020-0543
Vulnerability from osv_ubuntu
Published
2020-06-09 17:00
Modified
2026-04-22 07:39
Summary
Details

Incomplete cleanup from specific special register read operations in some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
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        "1.20130906.1ubuntu3",
        "2.20140122.1",
        "2.20140430.1ubuntu1",
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    {
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            "binary_name": "xen-system-armhf",
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          {
            "binary_name": "xen-utils-4.9",
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            "binary_name": "xen-utils-common",
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        "4.9.2-0ubuntu1"
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    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "intel-microcode",
            "binary_version": "3.20200609.0ubuntu0.20.04.0"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "intel-microcode",
        "purl": "pkg:deb/ubuntu/intel-microcode@3.20200609.0ubuntu0.20.04.0?arch=source\u0026distro=focal"
      },
      "ranges": [
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          "type": "ECOSYSTEM"
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      "versions": [
        "3.20190918.1ubuntu1",
        "3.20191115.1ubuntu1",
        "3.20191115.1ubuntu2",
        "3.20191115.1ubuntu3"
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    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
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            "binary_name": "libxencall1",
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        "name": "xen",
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      },
      "ranges": [
        {
          "events": [
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            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
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      "versions": [
        "4.9.2-0ubuntu2",
        "4.9.2-0ubuntu6",
        "4.9.2-0ubuntu7",
        "4.11.3+24-g14b62ab3e5-1ubuntu1",
        "4.11.3+24-g14b62ab3e5-1ubuntu2",
        "4.11.3+24-g14b62ab3e5-1ubuntu2.2"
      ]
    }
  ],
  "aliases": [],
  "details": "Incomplete cleanup from specific special register read operations in some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.",
  "id": "UBUNTU-CVE-2020-0543",
  "modified": "2026-04-22T07:39:16Z",
  "published": "2020-06-09T17:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-0543"
    },
    {
      "type": "REPORT",
      "url": "https://www.vusec.net/projects/crosstalk"
    },
    {
      "type": "REPORT",
      "url": "https://software.intel.com/security-software-guidance/software-guidance/special-register-buffer-data-sampling"
    },
    {
      "type": "REPORT",
      "url": "https://software.intel.com/security-software-guidance/insights/deep-dive-special-register-buffer-data-sampling"
    },
    {
      "type": "REPORT",
      "url": "https://software.intel.com/security-software-guidance/insights/processors-affected-special-register-buffer-data-sampling"
    },
    {
      "type": "REPORT",
      "url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00320.html"
    },
    {
      "type": "REPORT",
      "url": "https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/special-register-buffer-data-sampling.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4385-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4391-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4392-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4393-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4387-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4389-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4390-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4388-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5617-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-0543"
    }
  ],
  "related": [
    "USN-4385-1",
    "USN-4391-1",
    "USN-4392-1",
    "USN-4393-1",
    "USN-4387-1",
    "USN-4389-1",
    "USN-4390-1",
    "USN-4388-1",
    "USN-5617-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-0543"
  ]
}



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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

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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.
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  • 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.