RHSA-2021:1360: firefox security update

RHSA-2021:1360, released April 26, 2021, fixes 8 CVEs in firefox (version 0:78.10.0-1.el8_3). None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

8.8

Base score, 0 to 10

Highest EPSS

0.0176

78th percentile

Priority of the 8 CVEs

Patch now 0
                                Urgent 0
                                High 6
                                Routine 2

Fixed package versions

Product	Release	Fixed in
firefox	RHEL 8	0:78.10.0-1.el8_3

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2021-23994	Firefox ESR and 2 others: A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of bound…	8.8	0.0176	None reported
High	CVE-2021-23961	Firefox ESR and 1 other: Further techniques that built on the slipstream research combined with a malicious webpage could have…	7.4	0.0148	None reported
High	CVE-2021-23999	Firefox ESR and 2 others: If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System…	8.8	0.0137	None reported
High	CVE-2021-29946	Firefox ESR and 2 others: Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed…	8.8	0.0130	None reported
High	CVE-2021-23995	Firefox ESR and 2 others: When Responsive Design Mode was enabled, it used references to objects that were previously freed.	8.8	0.0118	None reported
High	CVE-2021-24002	Firefox ESR and 2 others: When a user clicked on an FTP URL containing encoded newline characters (%0A and %0D), the newlines would…	8.8	0.0113	None reported
Routine	CVE-2021-29945	Firefox ESR and 2 others: The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and…	6.5	0.0120	None reported
Routine	CVE-2021-23998	Firefox ESR and 2 others: Through complicated navigations with new windows, an HTTP page could have inherited a secure lock icon…	6.5	0.0059	None reported

Also fixes CVE-2021-23994

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-2021:1360

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