Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 506
Alerts This Week
Warning Icon 1 506

Red Hat Enterprise Linux: RHSA-2020:5257-01 Important: Firefox XSS Bug

red hat
Calendar Grey November 30, 2020
Dist Redhat Esm H88
A crucial security enhancement for Firefox on Red Hat Enterprise Linux boosts defense against several vulnerabilities.
An update for firefox is now available for Red Hat Enterprise Linux 6

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.

Summary

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.
This update upgrades Firefox to version 78.5.0 ESR.
Security Fix(es):
* Mozilla: Parsing mismatches could confuse and bypass security sanitizer for chrome privileged code (CVE-2020-26951)
* Mozilla: Memory safety bugs fixed in Firefox 83 and Firefox ESR 78.5 (CVE-2020-26968)
* Mozilla: Variable time processing of cross-origin images during drawImage calls (CVE-2020-16012)
* Mozilla: Fullscreen could be enabled without displaying the security UI (CVE-2020-26953)
* Mozilla: XSS through paste (manual and clipboard API) (CVE-2020-26956)
* Mozilla: Requests intercepted through ServiceWorkers lacked MIME type restrictions (CVE-2020-26958)
* Mozilla: Use-after-free in WebRequestService (CVE-2020-26959)
* Mozilla: Potential use-after-free in uses of nsTArray (CVE-2020-26960)
* Mozilla: DoH did not filter IPv4 mapped IP Addresses (CVE-2020-26961)
* Mozilla: Software keyboards may have remembered typed passwords (CVE-2020-26965)
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.

Topics%20covered

Topics Covered

security advisory security issue Red Hat Enterprise Linux important firefox security impact xss red hat enterprise web browser XSS issue service worker

References

https://access.redhat.com/security/cve/CVE-2020-16012 https://access.redhat.com/security/cve/CVE-2020-26951 https://access.redhat.com/security/cve/CVE-2020-26953 https://access.redhat.com/security/cve/CVE-2020-26956 https://access.redhat.com/security/cve/CVE-2020-26958 https://access.redhat.com/security/cve/CVE-2020-26959 https://access.redhat.com/security/cve/CVE-2020-26960 https://access.redhat.com/security/cve/CVE-2020-26961 https://access.redhat.com/security/cve/CVE-2020-26965 https://access.redhat.com/security/cve/CVE-2020-26968 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source: firefox-78.5.0-1.el6_10.src.rpm
i386: firefox-78.5.0-1.el6_10.i686.rpm
x86_64: firefox-78.5.0-1.el6_10.x86_64.rpm firefox-debuginfo-78.5.0-1.el6_10.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source: firefox-78.5.0-1.el6_10.src.rpm
x86_64: firefox-78.5.0-1.el6_10.x86_64.rpm firefox-debuginfo-78.5.0-1.el6_10.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source: firefox-78.5.0-1.el6_10.src.rpm
i386: firefox-78.5.0-1.el6_10.i686.rpm
ppc64: firefox-78.5.0-1.el6_10.ppc64.rpm firefox-debuginfo-78.5.0-1.el6_10.ppc64.rpm
s390x: firefox-78.5.0-1.el6_10.s390x.rpm firefox-debuginfo-78.5.0-1.el6_10.s390x.rpm
x86_64: firefox-78.5.0-1.el6_10.x86_64.rpm firefox-debuginfo-78.5.0-1.el6_10.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source: firefox-78.5.0-1.el6_10.src.rpm
i386: firefox-78.5.0-1.el6_10.i686.rpm
x86_64: firefox-78.5.0-1.el6_10.x86_64.rpm firefox-debuginfo-78.5.0-1.el6_10.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:5257-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:5257
Issue date: 2020-11-30

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 impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security issue Red Hat Enterprise Linux important firefox security impact xss red hat enterprise web browser XSS issue service worker

Relevant Releases Architectures

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Bugs Fixed

1898731 - CVE-2020-26951 Mozilla: Parsing mismatches could confuse and bypass security sanitizer for chrome privileged code

1898732 - CVE-2020-16012 Mozilla: Variable time processing of cross-origin images during drawImage calls

1898733 - CVE-2020-26953 Mozilla: Fullscreen could be enabled without displaying the security UI

1898734 - CVE-2020-26956 Mozilla: XSS through paste (manual and clipboard API)

1898735 - CVE-2020-26958 Mozilla: Requests intercepted through ServiceWorkers lacked MIME type restrictions

1898736 - CVE-2020-26959 Mozilla: Use-after-free in WebRequestService

1898737 - CVE-2020-26960 Mozilla: Potential use-after-free in uses of nsTArray

1898738 - CVE-2020-26961 Mozilla: DoH did not filter IPv4 mapped IP Addresses

1898739 - CVE-2020-26965 Mozilla: Software keyboards may have remembered typed passwords

1898741 - CVE-2020-26968 Mozilla: Memory safety bugs fixed in Firefox 83 and Firefox ESR 78.5

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.