CVE-2021-4128 — MEDIUM (6.5)

Vulnerability Description

When transitioning in and out of fullscreen mode, a graphics object was not correctly protected; resulting in memory corruption and a potentially exploitable crash.<br>*This bug only affects Firefox on MacOS. Other operating systems are unaffected.*. This vulnerability affects Firefox < 95.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Mozilla	Firefox	< 95.0
Apple	Macos	-

Related Weaknesses (CWE)

CWE-416

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1735852ExploitIssue TrackingPatch
https://www.mozilla.org/security/advisories/mfsa2021-52/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1735852ExploitIssue TrackingPatch
https://www.mozilla.org/security/advisories/mfsa2021-52/Vendor Advisory

FAQ

What is CVE-2021-4128?

CVE-2021-4128 is a vulnerability with a CVSS score of 6.5 (MEDIUM). When transitioning in and out of fullscreen mode, a graphics object was not correctly protected; resulting in memory corruption and a potentially exploitable crash.<br>*This bug only affects Firefox o...

How severe is CVE-2021-4128?

CVE-2021-4128 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-4128?

Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Apple Macos.