gsd-2020-28049
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents and, for example, intercept keystrokes or access the clipboard. This is caused by a race condition during Xauthority file creation.
Aliases
Aliases
CVE-2020-28049


To clipboard 

{
  "GSD": {
    "alias": "CVE-2020-28049",
    "description": "An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents and, for example, intercept keystrokes or access the clipboard. This is caused by a race condition during Xauthority file creation.",
    "id": "GSD-2020-28049",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-28049.html",
      "https://www.debian.org/security/2020/dsa-4783",
      "https://advisories.mageia.org/CVE-2020-28049.html",
      "https://security.archlinux.org/CVE-2020-28049"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-28049"
      ],
      "details": "An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents and, for example, intercept keystrokes or access the clipboard. This is caused by a race condition during Xauthority file creation.",
      "id": "GSD-2020-28049",
      "modified": "2023-12-13T01:22:01.749438Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2020-28049",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
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                          "version_value": "n/a"
                        }
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                    }
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              },
              "vendor_name": "n/a"
            }
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      },
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            "value": "An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents and, for example, intercept keystrokes or access the clipboard. This is caused by a race condition during Xauthority file creation."
          }
        ]
      },
      "problemtype": {
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                "lang": "eng",
                "value": "n/a"
              }
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      },
      "references": {
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            "refsource": "MISC",
            "url": "https://github.com/sddm/sddm/releases"
          },
          {
            "name": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-28049",
            "refsource": "MISC",
            "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-28049"
          },
          {
            "name": "https://github.com/sddm/sddm/blob/v0.19.0/ChangeLog",
            "refsource": "MISC",
            "url": "https://github.com/sddm/sddm/blob/v0.19.0/ChangeLog"
          },
          {
            "name": "DSA-4783",
            "refsource": "DEBIAN",
            "url": "https://www.debian.org/security/2020/dsa-4783"
          },
          {
            "name": "[debian-lts-announce] 20201106 [SECURITY] [DLA 2436-1] sddm security update",
            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2020/11/msg00009.html"
          },
          {
            "name": "openSUSE-SU-2020:1870",
            "refsource": "SUSE",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00031.html"
          },
          {
            "name": "FEDORA-2021-7066b95c99",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GT3EX5NSQJJAKY63ENSMEDX6NYZLYY3S/"
          },
          {
            "name": "GLSA-202402-02",
            "refsource": "GENTOO",
            "url": "https://security.gentoo.org/glsa/202402-02"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
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        "descriptions": [
          {
            "lang": "en",
            "value": "An issue was discovered in SDDM before 0.19.0. It incorrectly starts the X server in a way that - for a short time period - allows local unprivileged users to create a connection to the X server without providing proper authentication. A local attacker can thus access X server display contents and, for example, intercept keystrokes or access the clipboard. This is caused by a race condition during Xauthority file creation."
          },
          {
            "lang": "es",
            "value": "Se detect\u00f3 un problema en SDDM versiones anteriores a 0.19.0.\u0026#xa0;Inicia incorrectamente el servidor X de una manera que, durante un corto per\u00edodo de tiempo, permite a usuarios locales no privilegiados crear una conexi\u00f3n con el servidor X sin proveer la autenticaci\u00f3n apropiada.\u0026#xa0;Un atacante local puede as\u00ed acceder al contenido de la pantalla del servidor X y, por ejemplo, interceptar las pulsaciones de teclas o acceder al portapapeles.\u0026#xa0;Esto es causado por una condici\u00f3n de carrera durante la creaci\u00f3n del archivo Xauthority"
          }
        ],
        "id": "CVE-2020-28049",
        "lastModified": "2024-02-03T07:15:14.473",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "LOW",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 3.3,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:L/AC:M/Au:N/C:P/I:P/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 3.4,
              "impactScore": 4.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "LOCAL",
                "availabilityImpact": "NONE",
                "baseScore": 6.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
                "version": "3.1"
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              "impactScore": 5.2,
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        },
        "published": "2020-11-04T19:15:12.137",
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              "Third Party Advisory"
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        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
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            "source": "nvd@nist.gov",
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        ]
      }
    }
  }
}


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