RHSA-2019:0623 - Security Advisory

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 60.6.0 ESR.

Security Fix(es):

• Mozilla: Memory safety bugs fixed in Firefox 66 and Firefox ESR 60.6 (CVE-2019-9788)
• Mozilla: Use-after-free when removing in-use DOM elements (CVE-2019-9790)
• Mozilla: Type inference is incorrect for constructors entered through on-stack replacement with IonMonkey (CVE-2019-9791)
• Mozilla: IonMonkey leaks JS_OPTIMIZED_OUT magic value to script (CVE-2019-9792)
• Mozilla: Improper bounds checks when Spectre mitigations are disabled (CVE-2019-9793)
• Mozilla: Type-confusion in IonMonkey JIT compiler (CVE-2019-9795)
• Mozilla: Use-after-free with SMIL animation controller (CVE-2019-9796)
• Mozilla: Proxy Auto-Configuration file can define localhost access to be proxied (CVE-2018-18506)

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.

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 - 1690673 - CVE-2018-18506 Mozilla: Proxy Auto-Configuration file can define localhost access to be proxied
• BZ - 1690674 - CVE-2019-9788 Mozilla: Memory safety bugs fixed in Firefox 66 and Firefox ESR 60.6
• BZ - 1690675 - CVE-2019-9790 Mozilla: Use-after-free when removing in-use DOM elements
• BZ - 1690676 - CVE-2019-9791 Mozilla: Type inference is incorrect for constructors entered through on-stack replacement with IonMonkey
• BZ - 1690677 - CVE-2019-9792 Mozilla: IonMonkey leaks JS_OPTIMIZED_OUT magic value to script
• BZ - 1690678 - CVE-2019-9793 Mozilla: Improper bounds checks when Spectre mitigations are disabled
• BZ - 1690680 - CVE-2019-9795 Mozilla: Type-confusion in IonMonkey JIT compiler
• BZ - 1690681 - CVE-2019-9796 Mozilla: Use-after-free with SMIL animation controller

CVEs

• CVE-2018-18506
• CVE-2019-9788
• CVE-2019-9790
• CVE-2019-9791
• CVE-2019-9792
• CVE-2019-9793
• CVE-2019-9795
• CVE-2019-9796

References

• https://access.redhat.com/security/updates/classification/#critical
• https://www.mozilla.org/en-US/security/advisories/mfsa2019-08/