Published: 26/02/2021 Updated: 26/02/2021

Vulnerability Summary

Mozilla Firefox could allow a remote malicious user to bypass security restrictions, caused by the failure to correctly call the sizeof function, instead of using the API method that checks for invalid pointers. By persuading a victim to visit a specially-crafted Web site, a remote attacker could exploit this vulnerability to bypass security restrictions.

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Vendor Advisories

A security issue was found in Firefox before version 860 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 Firefox incorrectly called the sizeof function, instead of using the API method that checks for invalid pointers ...

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