GSD-2020-26951

Vulnerability from gsd - Updated: 2023-12-13 01:22
Details
A parsing and event loading mismatch in Firefox's SVG code could have allowed load events to fire, even after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal pages could have used this attack to bypass our built-in sanitizer. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
Aliases
Aliases
CVE-2020-26951
To clipboard 

{
  "GSD": {
    "alias": "CVE-2020-26951",
    "description": "A parsing and event loading mismatch in Firefox\u0027s SVG code could have allowed load events to fire, even after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal pages could have used this attack to bypass our built-in sanitizer. This vulnerability affects Firefox \u003c 83, Firefox ESR \u003c 78.5, and Thunderbird \u003c 78.5.",
    "id": "GSD-2020-26951",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-26951.html",
      "https://www.debian.org/security/2020/dsa-4796",
      "https://www.debian.org/security/2020/dsa-4793",
      "https://access.redhat.com/errata/RHSA-2020:5314",
      "https://access.redhat.com/errata/RHSA-2020:5257",
      "https://access.redhat.com/errata/RHSA-2020:5240",
      "https://access.redhat.com/errata/RHSA-2020:5239",
      "https://access.redhat.com/errata/RHSA-2020:5238",
      "https://access.redhat.com/errata/RHSA-2020:5237",
      "https://access.redhat.com/errata/RHSA-2020:5236",
      "https://access.redhat.com/errata/RHSA-2020:5235",
      "https://access.redhat.com/errata/RHSA-2020:5234",
      "https://access.redhat.com/errata/RHSA-2020:5233",
      "https://access.redhat.com/errata/RHSA-2020:5232",
      "https://access.redhat.com/errata/RHSA-2020:5231",
      "https://ubuntu.com/security/CVE-2020-26951",
      "https://advisories.mageia.org/CVE-2020-26951.html",
      "https://security.archlinux.org/CVE-2020-26951",
      "https://linux.oracle.com/cve/CVE-2020-26951.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-26951"
      ],
      "details": "A parsing and event loading mismatch in Firefox\u0027s SVG code could have allowed load events to fire, even after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal pages could have used this attack to bypass our built-in sanitizer. This vulnerability affects Firefox \u003c 83, Firefox ESR \u003c 78.5, and Thunderbird \u003c 78.5.",
      "id": "GSD-2020-26951",
      "modified": "2023-12-13T01:22:09.249839Z",
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    }
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": true
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 2.7
        }
      },
      "lastModifiedDate": "2020-12-09T19:49Z",
      "publishedDate": "2020-12-09T01:15Z"
    }
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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