Synopsis:          Important: firefox security update
Advisory ID:       SLSA-2021:4116-1
Issue Date:        2021-11-03
CVE Numbers:       CVE-2021-38503
                   CVE-2021-38504
                   CVE-2021-38506
                   CVE-2021-38507
                   CVE-2021-38508
                   CVE-2021-38509
--

This update upgrades Firefox to version 91.3.0 ESR.

Security Fix(es):

* Mozilla: Use-after-free in HTTP2 Session object

* Mozilla: Memory safety bugs fixed in Firefox 94 and Firefox ESR 91.3

* Mozilla: iframe sandbox rules did not apply to XSLT stylesheets
(CVE-2021-38503)

* Mozilla: Use-after-free in file picker dialog (CVE-2021-38504)

* Mozilla: Firefox could be coaxed into going into fullscreen mode without
notification or warning (CVE-2021-38506)

* Mozilla: Opportunistic Encryption in HTTP2 could be used to bypass the
Same-Origin-Policy on services hosted on other ports (CVE-2021-38507)

* Mozilla: Permission Prompt could be overlaid, resulting in user
confusion  and potential spoofing (CVE-2021-38508)

* Mozilla: Javascript alert box could have been spoofed onto an arbitrary
domain (CVE-2021-38509)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
--

SL7
  x86_64
    firefox-91.3.0-1.el7_9.x86_64.rpm
    firefox-debuginfo-91.3.0-1.el7_9.x86_64.rpm
    firefox-91.3.0-1.el7_9.i686.rpm

- Scientific Linux Development Team

SciLinux: SLSA-2021-4116-1 Important: firefox on SL7.x x86_64

This update upgrades Firefox to version 91.3.0 ESR

Summary

Important: firefox security update



Security Fixes

* Mozilla: Use-after-free in HTTP2 Session object
* Mozilla: Memory safety bugs fixed in Firefox 94 and Firefox ESR 91.3
* Mozilla: iframe sandbox rules did not apply to XSLT stylesheets (CVE-2021-38503)
* Mozilla: Use-after-free in file picker dialog (CVE-2021-38504)
* Mozilla: Firefox could be coaxed into going into fullscreen mode without notification or warning (CVE-2021-38506)
* Mozilla: Opportunistic Encryption in HTTP2 could be used to bypass the Same-Origin-Policy on services hosted on other ports (CVE-2021-38507)
* Mozilla: Permission Prompt could be overlaid, resulting in user confusion and potential spoofing (CVE-2021-38508)
* Mozilla: Javascript alert box could have been spoofed onto an arbitrary domain (CVE-2021-38509)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE
SL7 x86_64 firefox-91.3.0-1.el7_9.x86_64.rpm firefox-debuginfo-91.3.0-1.el7_9.x86_64.rpm firefox-91.3.0-1.el7_9.i686.rpm
- Scientific Linux Development Team

Severity
Advisory ID: SLSA-2021:4116-1
Issued Date: : 2021-11-03
CVE Numbers: CVE-2021-38503
CVE-2021-38504
CVE-2021-38506

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