GSD-2020-6819

Vulnerability from gsd - Updated: 2023-12-13 01:21
Details
Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.
Aliases
Aliases
CVE-2020-6819
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{
  "GSD": {
    "alias": "CVE-2020-6819",
    "description": "Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird \u003c 68.7.0, Firefox \u003c 74.0.1, and Firefox ESR \u003c 68.6.1.",
    "id": "GSD-2020-6819",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-6819.html",
      "https://www.debian.org/security/2020/dsa-4656",
      "https://www.debian.org/security/2020/dsa-4653",
      "https://access.redhat.com/errata/RHSA-2020:1496",
      "https://access.redhat.com/errata/RHSA-2020:1495",
      "https://access.redhat.com/errata/RHSA-2020:1489",
      "https://access.redhat.com/errata/RHSA-2020:1488",
      "https://access.redhat.com/errata/RHSA-2020:1341",
      "https://access.redhat.com/errata/RHSA-2020:1340",
      "https://access.redhat.com/errata/RHSA-2020:1339",
      "https://access.redhat.com/errata/RHSA-2020:1338",
      "https://ubuntu.com/security/CVE-2020-6819",
      "https://advisories.mageia.org/CVE-2020-6819.html",
      "https://security.archlinux.org/CVE-2020-6819",
      "https://linux.oracle.com/cve/CVE-2020-6819.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-6819"
      ],
      "details": "Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird \u003c 68.7.0, Firefox \u003c 74.0.1, and Firefox ESR \u003c 68.6.1.",
      "id": "GSD-2020-6819",
      "modified": "2023-12-13T01:21:54.677904Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cisa.gov": {
      "cveID": "CVE-2020-6819",
      "dateAdded": "2021-11-03",
      "dueDate": "2022-05-03",
      "product": "nsDocShell destructor",
      "requiredAction": "Apply updates per vendor instructions.",
      "shortDescription": "A race condition can cause a use-after-free when running the nsDocShell destructor. This vulnerability affects Thunderbird \u003c 68.7.0, Firefox \u003c 74.0.1, and Firefox ESR \u003c 68.6.1.",
      "vendorProject": "Mozilla",
      "vulnerabilityName": "Mozilla Firefox 74 and Firefox ESR 68.6 nsDocShell vulnerability"
    },
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          }
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      },
      "problemtype": {
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      "references": {
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            "refsource": "MISC",
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          },
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            "name": "https://bugzilla.mozilla.org/show_bug.cgi?id=1620818",
            "refsource": "MISC",
            "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1620818"
          },
          {
            "name": "USN-4335-1",
            "refsource": "UBUNTU",
            "url": "https://usn.ubuntu.com/4335-1/"
          }
        ]
      }
    },
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          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
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                "value": "Use-after-free while running the nsDocShell destructor"
              }
            ]
          }
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            "url": "https://www.mozilla.org/security/advisories/mfsa2020-11/"
          },
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            "url": "https://www.mozilla.org/security/advisories/mfsa2020-14/"
          },
          {
            "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1620818"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "cisaActionDue": "2022-05-03",
        "cisaExploitAdd": "2021-11-03",
        "cisaRequiredAction": "Apply updates per vendor instructions.",
        "cisaVulnerabilityName": "Mozilla Firefox And Thunderbird Use-After-Free Vulnerability",
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "781555D1-8E31-4BD3-9C51-40D7B43C9130",
                    "versionEndExcluding": "74.0.1",
                    "vulnerable": true
                  },
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                    "criteria": "cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*",
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                "negate": false,
                "operator": "OR"
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        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird \u003c 68.7.0, Firefox \u003c 74.0.1, and Firefox ESR \u003c 68.6.1."
          },
          {
            "lang": "es",
            "value": "Bajo determinadas condiciones, cuando se ejecuta el destructor nsDocShell, una condici\u00f3n de carrera puede causar un uso de la memoria previamente liberada. Somos conscientes de los ataques dirigidos \"in the wild\" que abusan de este fallo. Esta vulnerabilidad afecta a Thunderbird versiones anteriores a 68.7.0, Firefox versiones anteriores a 74.0.1 y Firefox ESR versiones anteriores a 68.6.1."
          }
        ],
        "id": "CVE-2020-6819",
        "lastModified": "2024-02-02T16:44:00.063",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 6.8,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 8.6,
              "impactScore": 6.4,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.1,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
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              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2020-04-24T16:15:13.370",
        "references": [
          {
            "source": "security@mozilla.org",
            "tags": [
              "Exploit",
              "Issue Tracking"
            ],
            "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1620818"
          },
          {
            "source": "security@mozilla.org",
            "tags": [
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            ],
            "url": "https://usn.ubuntu.com/4335-1/"
          },
          {
            "source": "security@mozilla.org",
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            "tags": [
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            "url": "https://www.mozilla.org/security/advisories/mfsa2020-14/"
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        "sourceIdentifier": "security@mozilla.org",
        "vulnStatus": "Analyzed",
        "weaknesses": [
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            "description": [
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                "lang": "en",
                "value": "CWE-362"
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              {
                "lang": "en",
                "value": "CWE-416"
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    }
  }
}


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  • 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 patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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