Topic

An update for firefox is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact of Critical. 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.

Description

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

This update upgrades Firefox to version 60.3.0 ESR.

Security Fix(es):

• Mozilla: Memory safety bugs fixed in Firefox 63 and Firefox ESR 60.3 (CVE-2018-12390)
• Mozilla: Crash with nested event loops (CVE-2018-12392)
• Mozilla: Integer overflow during Unicode conversion while loading JavaScript (CVE-2018-12393)
• Mozilla: WebExtension bypass of domain restrictions through header rewriting (CVE-2018-12395)
• Mozilla: WebExtension content scripts can execute in disallowed contexts (CVE-2018-12396)
• Mozilla: WebExtension local file permission check bypass (CVE-2018-12397)
• Mozilla: Memory safety bugs fixed in Firefox ESR 60.3 (CVE-2018-12389)

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

Red Hat would like to thank the Mozilla project for reporting these issues. Upstream acknowledges Christian Holler, Bob Owen, Boris Zbarsky, Calixte Denizet, Jason Kratzer, Jed Davis, Taegeon Lee, Philipp, Ronald Crane, Raul Gurzau, Gary Kwong, Tyson Smith, Raymond Forbes, Bogdan Tara, Nils, r, Rob Wu, Andrew Swan, and Daniel Veditz as the original reporters.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the update, Firefox must be restarted for the changes to take effect.

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x

Fixes

• BZ - 1642179 - CVE-2018-12389 Mozilla: Memory safety bugs fixed in Firefox ESR 60.3
• BZ - 1642180 - CVE-2018-12390 Mozilla: Memory safety bugs fixed in Firefox 63 and Firefox ESR 60.3
• BZ - 1642182 - CVE-2018-12392 Mozilla: Crash with nested event loops
• BZ - 1642183 - CVE-2018-12393 Mozilla: Integer overflow during Unicode conversion while loading JavaScript
• BZ - 1642185 - CVE-2018-12395 Mozilla: WebExtension bypass of domain restrictions through header rewriting
• BZ - 1642186 - CVE-2018-12396 Mozilla: WebExtension content scripts can execute in disallowed contexts
• BZ - 1642187 - CVE-2018-12397 Mozilla: WebExtension local file permission check bypass

CVEs

• CVE-2018-12389
• CVE-2018-12390
• CVE-2018-12392
• CVE-2018-12393
• CVE-2018-12395
• CVE-2018-12396
• CVE-2018-12397

References

• https://access.redhat.com/security/updates/classification/#critical
• https://www.mozilla.org/en-US/security/advisories/mfsa2018-27/