Summary
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.
Fixed packages 1
| Release | Package | Fixed in |
|---|---|---|
| Rocky Linux · 8 | firefox | 0:91.3.0-1.el8 |
Vulnerabilities 8
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Unscored —
The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such…
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Unscored —
When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have …
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Unscored —
Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user…
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Unscored —
The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while …
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Unscored —
By displaying a form validity message in the correct location at the same time as a permission prompt (such as for geol…
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Unscored —
Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled…
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Unscored —
Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. Some o…
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Unscored —
A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory …
References
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2019621
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2019622
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2019624
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2019625
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2019626
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2019627
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2019628
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2019630