10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10 High
AI Score
Confidence
High
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.007 Low
EPSS
Percentile
80.0%
Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.
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 page(s) listed in the References section.
bugzilla.redhat.com/show_bug.cgi?id=2019621
bugzilla.redhat.com/show_bug.cgi?id=2019622
bugzilla.redhat.com/show_bug.cgi?id=2019624
bugzilla.redhat.com/show_bug.cgi?id=2019625
bugzilla.redhat.com/show_bug.cgi?id=2019626
bugzilla.redhat.com/show_bug.cgi?id=2019627
bugzilla.redhat.com/show_bug.cgi?id=2019628
bugzilla.redhat.com/show_bug.cgi?id=2019630
errata.rockylinux.org/RLSA-2021:4123
10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10 High
AI Score
Confidence
High
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.007 Low
EPSS
Percentile
80.0%