Linux · Oracle Linux · Security advisory · December 17, 2020

ELSA-2020-5562-1: firefox security update

ELSA-2020-5562-1, released December 17, 2020, fixes 7 CVEs in firefox (version 0:78.6.0-1.0.1.el8_3). None of them is reported as exploited. Patch Radar priority: High.

High
CVEs closed
7
None rated Critical
Exploited
0
None reported
Highest CVSS
8.8
Base score, 0 to 10
Highest EPSS
0.0190
79th percentile

Priority of the 7 CVEs

Patch now 0 Urgent 0 High 4 Routine 3

Fixed package versions

ProductReleaseFixed in
firefoxol 80:78.6.0-1.0.1.el8_3

CVEs this fix closes

PriorityCVETitleCVSSEPSSExploitation
High CVE-2020-26971 Firefox ESR and 2 others: Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow…8.8 0.0190 None reported
High CVE-2020-26973 Firefox ESR and 2 others: Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed.8.8 0.0162 None reported
High CVE-2020-35113 Firefox ESR and 2 others: Mozilla developers reported memory safety bugs present in Firefox 83 and Firefox ESR 78.5.8.8 0.0157 None reported
High CVE-2020-26974 Firefox ESR and 2 others: When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly…8.8 0.0153 None reported
Routine CVE-2020-35111 Firefox ESR and 2 others: When an extension with the proxy permission registered to receive <all_urls>, the proxy.onRequest callback…4.3 0.0143 None reported
Routine CVE-2020-26978 Firefox ESR and 2 others: Using techniques that built on the slipstream research, a malicious webpage could have exposed both an…6.1 0.0133 None reported
Routine CVE-2020-16042 firefox: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability. This...6.5 0.0111 None reported
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