CVE-2021-23973

Published: 26 February 2021

When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.

Notes

Author	Note
tyhicks	mozjs contains a copy of the SpiderMonkey JavaScript engine

Priority

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package	Release	Status
firefox Launchpad, Ubuntu, Debian	bionic	Released (86.0+build3-0ubuntu0.18.04.1)
	focal	Released (86.0+build3-0ubuntu0.20.04.1)
	groovy	Released (86.0+build3-0ubuntu0.20.10.1)
	hirsute	Released (86.0+build3-0ubuntu1)
	impish	Released (86.0+build3-0ubuntu1)
	jammy	Released (86.0+build3-0ubuntu1)
	kinetic	Released (86.0+build3-0ubuntu1)
	lunar	Released (86.0+build3-0ubuntu1)
	trusty	Does not exist
	upstream	Released (86)
	xenial	Released (86.0+build3-0ubuntu0.16.04.1)
firefox-esr Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	groovy	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	kinetic	Does not exist
	lunar	Does not exist
	trusty	Does not exist
	upstream	Released (78.8.0esr-1)
	xenial	Does not exist
mozjs38 Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Does not exist
	groovy	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	kinetic	Does not exist
	lunar	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist
mozjs52 Launchpad, Ubuntu, Debian	bionic	Needs triage
	focal	Needs triage
	groovy	Ignored (reached end-of-life)
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	kinetic	Does not exist
	lunar	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist
mozjs60 Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	groovy	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	kinetic	Does not exist
	lunar	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist
mozjs68 Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Needs triage
	groovy	Ignored (reached end-of-life)
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	kinetic	Does not exist
	lunar	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist
mozjs78 Launchpad, Ubuntu, Debian	bionic	Does not exist
	focal	Does not exist
	groovy	Ignored (reached end-of-life)
	hirsute	Ignored (reached end-of-life)
	impish	Ignored (reached end-of-life)
	jammy	Needs triage
	kinetic	Needs triage
	lunar	Needs triage
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist
thunderbird Launchpad, Ubuntu, Debian	bionic	Released (1:78.8.1+build1-0ubuntu0.18.04.1)
	focal	Released (1:78.8.1+build1-0ubuntu0.20.04.1)
	groovy	Released (1:78.8.1+build1-0ubuntu0.20.10.1)
	hirsute	Not vulnerable (1:78.8.1+build1-0ubuntu1)
	impish	Not vulnerable (1:78.8.1+build1-0ubuntu1)
	jammy	Not vulnerable (1:78.8.1+build1-0ubuntu1)
	kinetic	Not vulnerable (1:78.8.1+build1-0ubuntu1)
	lunar	Not vulnerable (1:78.8.1+build1-0ubuntu1)
	trusty	Does not exist
	upstream	Released (78.8)
	xenial	Ignored (end of standard support, was needed)

Severity score breakdown

Parameter	Value
Base score	6.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

References

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