RHSA-2021:0290 — Security Advisory

An update for firefox is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

This update upgrades Firefox to version 78.7.0 ESR.

Security Fix(es):

• Mozilla: Cross-origin information leakage via redirected PDF requests (CVE-2021-23953)

• Mozilla: Type confusion when using logical assignment operators in JavaScript switch statements (CVE-2021-23954)

• Mozilla: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7 (CVE-2021-23964)

• Mozilla: HTTPS pages could have been intercepted by a registered service worker when they should not have been (CVE-2020-26976)

• Mozilla: Use-after-poison for incorrectly redeclared JavaScript variables during GC (CVE-2021-23960)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.