CVE-2021-23997

Due to unexpected data type conversions, a use-after-free could have occurred when interacting with the font cache. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox < 88.

CVSS v3 8.8 HIGH
CVSS v2.0 6.8 MEDIUM

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1701942	Issue Tracking Permissions Required Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-16/	Release Notes Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

History

02 Jul 2021, 17:21

Type	Values Removed	Values Added
CPE		cpe:2.3:a:mozilla:firefox::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 6.8 v3 : 8.8
References	~~(MISC) https://www.mozilla.org/security/advisories/mfsa2021-16/ -~~	(MISC) https://www.mozilla.org/security/advisories/mfsa2021-16/ - Release Notes, Vendor Advisory
References	~~(MISC) https://bugzilla.mozilla.org/show_bug.cgi?id=1701942 -~~	(MISC) https://bugzilla.mozilla.org/show_bug.cgi?id=1701942 - Issue Tracking, Permissions Required, Vendor Advisory
CWE		CWE-681

24 Jun 2021, 14:20

Type	Values Removed	Values Added
New CVE

Information

Published : 2021-06-24 14:15

Updated : 2023-12-10 13:55

NVD link : CVE-2021-23997

Mitre link : CVE-2021-23997

CVE.ORG link : CVE-2021-23997

JSON object : View

Products Affected

mozilla

firefox

CWE

CWE-681

Incorrect Conversion between Numeric Types

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