FKIE_CVE-2020-26951

Vulnerability from fkie_nvd - Published: 2020-12-09 01:15 - Updated: 2024-11-21 05:20
Severity ?
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Summary
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.
References
security@mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1667113Issue Tracking, Permissions Required, Vendor Advisory
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2020-50/Vendor Advisory
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2020-51/Vendor Advisory
security@mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2020-52/Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.mozilla.org/show_bug.cgi?id=1667113Issue Tracking, Permissions Required, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2020-50/Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2020-51/Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2020-52/Vendor Advisory
Impacted products
Vendor Product Version
mozilla firefox *
mozilla firefox_esr *
mozilla thunderbird *
To clipboard 

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  "descriptions": [
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      "value": "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."
    },
    {
      "lang": "es",
      "value": "Un desajuste en el an\u00e1lisis y la carga de eventos en el c\u00f3digo SVG de Firefox podr\u00eda haber permitido a unos eventos de carga dispararse, incluso despu\u00e9s del saneamiento. Un atacante ya capaz de explotar una vulnerabilidad de tipo XSS en p\u00e1ginas internas privilegiadas podr\u00eda haber usado este ataque para omitir nuestro sanitizador incorporado. Esta vulnerabilidad afecta a Firefox versiones anteriores a 83, Firefox ESR versiones anteriores a  78.5, y Thunderbird versiones anteriores a 78.5"
    }
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  "id": "CVE-2020-26951",
  "lastModified": "2024-11-21T05:20:33.943",
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