Vulnerability Description
The developer page about:memory has a Measure function for exploring what object types the browser has allocated and their sizes. When this function was invoked we incorrectly called the sizeof function, instead of using the API method that checks for invalid pointers. This vulnerability affects Firefox < 86.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 86.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1685145Issue TrackingPermissions RequiredVendor Advisory
- https://security.gentoo.org/glsa/202104-10Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-07/Release NotesVendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1685145Issue TrackingPermissions RequiredVendor Advisory
- https://security.gentoo.org/glsa/202104-10Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-07/Release NotesVendor Advisory
FAQ
What is CVE-2021-23975?
CVE-2021-23975 is a vulnerability with a CVSS score of 6.5 (MEDIUM). The developer page about:memory has a Measure function for exploring what object types the browser has allocated and their sizes. When this function was invoked we incorrectly called the sizeof functi...
How severe is CVE-2021-23975?
CVE-2021-23975 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-2021-23975?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox.