CVE-2021-23995

When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

CVSS v3.0 8.8 HIGH
CVSS v2.0 5.1 MEDIUM

8.8^/10

CVSS v3.0 : HIGH

V3 Legend

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

5.1^/10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 4.9 / Impact : 6.4

Access Vector NETWORK

Access Complexity HIGH

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.mozilla.org/security/advisories/mfsa2021-15/	Release Notes Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-16/	Release Notes Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-14/	Release Notes Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1699835	Issue Tracking Permissions Required Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mozilla:firefox::::::::
	cpe:2.3:a:mozilla:firefox_esr::::::::
	cpe:2.3:a:mozilla:thunderbird::::::::

Information

Published : 2021-06-24 07:15

Updated : 2021-07-02 09:59

NVD link : CVE-2021-23995

Mitre link : CVE-2021-23995

JSON object : View

CWE

CWE-672

Operation on a Resource after Expiration or Release

Products Affected

mozilla

firefox
firefox_esr
thunderbird

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8.8 /10