CVE-2021-43539

CVE Details

Release Date:	2021-12-08
Impact:	None	What is this?

Description

Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

See more information about CVE-2021-43539 from MITRE CVE dictionary and NIST NVD

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

CVSS v3 metrics

Base Score:	8.8
Vector String:	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Version:	3.0
Attack 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-2021-5014	2021-12-08
Oracle Linux version 7 (thunderbird)	ELSA-2021-5046	2021-12-10
Oracle Linux version 8 (firefox)	ELSA-2021-5013	2021-12-09
Oracle Linux version 8 (thunderbird)	ELSA-2021-5045	2021-12-10