RHSA-2021:0990: firefox security update

RHSA-2021:0990, released March 25, 2021, fixes 5 CVEs in firefox (version 0:78.9.0-1.el8_3). None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

9.8

Base score, 0 to 10

Highest EPSS

0.0142

72nd percentile

Priority of the 5 CVEs

Patch now 0
                                Urgent 0
                                High 3
                                Routine 2

Fixed package versions

Product	Release	Fixed in
firefox	RHEL 8	0:78.9.0-1.el8_3

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2021-23987	Firefox ESR and 2 others: Mozilla developers and community members reported memory safety bugs present in Firefox 86 and Firefox…	8.8	0.0142	None reported
High	CVE-2021-23981	Firefox ESR and 2 others: A texture upload of a Pixel Buffer Object could have confused the WebGL code to skip binding the buffer…	8.1	0.0115	None reported
High	CVE-2021-4127	Thunderbird: An out of date graphics library (Angle) likely contained vulnerabilities that could potentially be exploited.	9.8	0.0095	None reported
Routine	CVE-2021-23984	Firefox ESR and 2 others: A malicious extension could have opened a popup window lacking an address bar.	6.5	0.0111	None reported
Routine	CVE-2021-23982	Firefox ESR and 2 others: Using techniques that built on the slipstream research, a malicious webpage could have scanned both an…	6.5	0.0074	None reported

Also fixes CVE-2021-23987

Mozilla Firefox ESR (en-US) 91.0
Mozilla Firefox ESR (en-US)
Mozilla Thunderbird (en-US) 78.10.0
Mozilla Thunderbird (en-US)
thunderbird 1:78.11.0+build1-0ubuntu0.18.04.2
thunderbird on Ubuntu 18.04.6 LTS (bionic)
thunderbird 1:78.11.0+build1-0ubuntu0.20.04.2
thunderbird on Ubuntu 20.04 LTS (focal)
thunderbird-gnome-support 1:78.11.0+build1-0ubuntu0.18.04.2
thunderbird-gnome-support on Ubuntu 18.04.6 LTS (bionic)
thunderbird-gnome-support 1:78.11.0+build1-0ubuntu0.20.04.2
thunderbird-gnome-support on Ubuntu 20.04 LTS (focal)
thunderbird-mozsymbols 1:78.11.0+build1-0ubuntu0.18.04.2
thunderbird-mozsymbols on Ubuntu 18.04.6 LTS (bionic)
thunderbird-mozsymbols 1:78.11.0+build1-0ubuntu0.20.04.2
thunderbird-mozsymbols on Ubuntu 20.04 LTS (focal)

Vendor advisory

https://access.redhat.com/errata/RHSA-2021:0990

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