FKIE_CVE-2021-3472

Vulnerability from fkie_nvd - Published: 2021-04-26 15:15 - Updated: 2026-06-17 04:05
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
A flaw was found in xorg-x11-server in versions before 1.20.11. An integer underflow can occur in xserver which can lead to a local privilege escalation. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
References
secalert@redhat.comhttp://www.openwall.com/lists/oss-security/2021/04/13/1Mailing List, Patch, Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1944167Issue Tracking, Patch, Third Party Advisory
secalert@redhat.comhttps://gitlab.freedesktop.org/xorg/xserver/-/commit/7aaf54a1884f71dc363f0b884e57bcb67407a6cdPatch, Third Party Advisory
secalert@redhat.comhttps://lists.debian.org/debian-lts-announce/2021/04/msg00013.htmlMailing List, Third Party Advisory
secalert@redhat.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDF7TAJE7NPZPNVOXSD5HBIFLNPUOD2V/
secalert@redhat.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MO6S5OPXUDYBSRSVWVLFLJ6AFERG4HNY/
secalert@redhat.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N63KL3T22HNFT4FJ7VMVF6U5Q4RFJIQF/
secalert@redhat.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PEXPCLMVU25AUZTUXC4MYBGPKOAIM5TW/
secalert@redhat.comhttps://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
secalert@redhat.comhttps://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
secalert@redhat.comhttps://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
secalert@redhat.comhttps://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
secalert@redhat.comhttps://seclists.org/oss-sec/2021/q2/20Mailing List, Patch, Third Party Advisory
secalert@redhat.comhttps://security.gentoo.org/glsa/202104-02Third Party Advisory
secalert@redhat.comhttps://www.debian.org/security/2021/dsa-4893Third Party Advisory
secalert@redhat.comhttps://www.tenable.com/plugins/nessus/148701Third Party Advisory
secalert@redhat.comhttps://www.zerodayinitiative.com/advisories/ZDI-21-463/Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/04/13/1Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1944167Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://gitlab.freedesktop.org/xorg/xserver/-/commit/7aaf54a1884f71dc363f0b884e57bcb67407a6cdPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/04/msg00013.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MDF7TAJE7NPZPNVOXSD5HBIFLNPUOD2V/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MO6S5OPXUDYBSRSVWVLFLJ6AFERG4HNY/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N63KL3T22HNFT4FJ7VMVF6U5Q4RFJIQF/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PEXPCLMVU25AUZTUXC4MYBGPKOAIM5TW/
af854a3a-2127-422b-91ae-364da2661108https://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.x.org/archives/xorg-announce/2021-April/003080.htmlMailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://seclists.org/oss-sec/2021/q2/20Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202104-02Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2021/dsa-4893Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.tenable.com/plugins/nessus/148701Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.zerodayinitiative.com/advisories/ZDI-21-463/Third Party Advisory, VDB Entry
Impacted products
Vendor Product Version
x.org x_server *
fedoraproject fedora 32
fedoraproject fedora 33
fedoraproject fedora 34
debian debian_linux 9.0
debian debian_linux 10.0
redhat enterprise_linux 7.0
redhat enterprise_linux 8.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "xorg-x11-server",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "xorg-x11-server 1.20.11"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
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              "versionEndExcluding": "1.20.11",
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in xorg-x11-server in versions before 1.20.11. An integer underflow can occur in xserver which can lead to a local privilege escalation. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 un fallo en xorg-x11-server en versiones anteriores a 1.20.11.\u0026#xa0;Se puede producir un subdesbordamiento de enteros en xserver que puede conllevar a una escalada de privilegios local.\u0026#xa0;La mayor amenaza de esta vulnerabilidad es la confidencialidad e integridad de los datos, as\u00ed como la disponibilidad del sistema"
    }
  ],
  "id": "CVE-2021-3472",
  "lastModified": "2026-06-17T04:05:09.870",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 7.2,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-04-26T15:15:07.857",
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  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-191"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}



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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.



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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.