CVE-2021-23960

CVE Details

Release Date:

2021-02-26

Description

Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.

See more information about CVE-2021-23960 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	8.8	Base Metrics:	AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Access Vector:	Network	Attack Complexity:	Low
Privileges Required:	None	User Interaction:	Required
Scope:	Unchanged	Confidentiality Impact:	High
Integrity Impact:	High	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (firefox)	ELSA-2021-0290	2021-01-28
Oracle Linux version 7 (thunderbird)	ELSA-2021-0297	2021-01-29
Oracle Linux version 8 (firefox)	ELSA-2021-0288	2021-01-28
Oracle Linux version 8 (thunderbird)	ELSA-2021-0298	2021-01-29

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team