Published: 26/02/2021 Updated: 27/05/2022

CVSS v2 Base Score: 4.3 | Impact Score: 2.9 | Exploitability Score: 8.6

CVSS v3 Base Score: 6.5 | Impact Score: 3.6 | Exploitability Score: 2.8

VMScore: 383

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

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.

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mozilla firefox

Mozilla Foundation Security Advisory 2021-07 Security Vulnerabilities fixed in Firefox 86 Announced February 23, 2021 Impact high Products Firefox Fixed in Firefox 86 ...

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 ...

CWE-862 https://bugzilla.mozilla.org/show_bug.cgi?id=1685145 https://www.mozilla.org/security/advisories/mfsa2021-07/https://security.gentoo.org/glsa/202104-10 https://nvd.nist.gov https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/https://security.archlinux.org/CVE-2021-23975

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CVE-2021-23975

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