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
