QID 376145

Date Published: 2021-12-09

QID 376145: Mozilla Firefox ESR Multiple Vulnerabilities (MFSA2021-53)

Firefox is a free and open-source web browser developed for Windows, OS X, and Linux, with a mobile version for Android.

Mozilla Firefox ESR is prone to
CVE-2021-43536: URL leakage when navigating while executing asynchronous function
CVE-2021-43537: Heap buffer overflow when using structured clone
CVE-2021-43538: Missing fullscreen and pointer lock notification when requesting both
CVE-2021-43539: GC rooting failure when calling wasm instance methods
CVE-2021-43541: External protocol handler parameters were unescaped
CVE-2021-43542: XMLHttpRequest error codes could have leaked the existence of an external protocol handler
CVE-2021-43543: Bypass of CSP sandbox directive when embedding
CVE-2021-43545: Denial of Service when using the Location API in a loop
CVE-2021-43546: Cursor spoofing could overlay user interface when native cursor is zoomed

Affected Products:
Prior to Firefox ESR 91.4.0

QID Detection Logic (Authenticated) :
This checks for vulnerable version of Firefox browser.


Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a security breach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as Critical - 8.8 severity.
  • CVSS V2 rated as High - 6.8 severity.
    • Solution
    Vendor has released fix to address these vulnerabilities. Refer to MFSA2021-53 or later
    Vendor References

    CVEs related to QID 376145

    CVE-2021-43543 | CVE-2021-43546 | CVE-2021-43541 | CVE-2021-43536 | CVE-2021-43545 | CVE-2021-43537 | CVE-2021-43539 | CVE-2021-43538 | CVE-2021-43542 |
    Software Advisories
    Advisory ID Software Component Link
    MFSA2021-53 URL Logo www.mozilla.org/en-US/security/advisories/mfsa2021-53/
    By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].