gsd-2020-26951
Vulnerability from gsd
Modified
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
{
"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": {
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],
"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",
"schema_version": "1.4.0"
}
},
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"refsource": "MISC",
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{
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"refsource": "CONFIRM",
"url": "https://www.mozilla.org/security/advisories/mfsa2020-50/"
},
{
"name": "https://www.mozilla.org/security/advisories/mfsa2020-52/",
"refsource": "CONFIRM",
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},
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},
"nvd.nist.gov": {
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"nodes": [
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"cpe_match": [
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"cpe_name": [],
"versionEndExcluding": "83.0",
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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": {
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"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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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.