Cross-site Scripting (XSS) Affecting firefox package, versions <0:78.5.0-1.0.1.el7_9
Threat Intelligence
EPSS
0.1% (42nd
percentile)
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Test your applications- Snyk ID SNYK-ORACLE7-FIREFOX-2572970
- published 10 Apr 2022
- disclosed 9 Dec 2020
Introduced: 9 Dec 2020
CVE-2020-26956 Open this link in a new tabHow to fix?
Upgrade Oracle:7 firefox to version 0:78.5.0-1.0.1.el7_9 or higher.
This issue was patched in ELSA-2020-5239.
NVD Description
Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Oracle.
See How to fix? for Oracle:7 relevant fixed versions and status.
In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and therefore lead to XSS. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
References
- https://linux.oracle.com/cve/CVE-2020-26956.html
- https://linux.oracle.com/errata/ELSA-2020-5235.html
- https://linux.oracle.com/errata/ELSA-2020-5236.html
- https://linux.oracle.com/errata/ELSA-2020-5237.html
- https://linux.oracle.com/errata/ELSA-2020-5238.html
- https://linux.oracle.com/errata/ELSA-2020-5239.html
- https://linux.oracle.com/errata/ELSA-2020-5257.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=1666300
- https://www.mozilla.org/security/advisories/mfsa2020-50/
- https://www.mozilla.org/security/advisories/mfsa2020-51/
- https://www.mozilla.org/security/advisories/mfsa2020-52/
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