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Mozilla Foundation Security Advisory 2022-10

Security Vulnerabilities fixed in Firefox 98

Announced
March 8, 2022
Impact
high
Products
Firefox
Fixed in
  • Firefox 98

#CVE-2022-26383: Browser window spoof using fullscreen mode

Reporter
Irvan Kurniawan
Impact
high
Description

When resizing a popup after requesting fullscreen access, the popup would not display the fullscreen notification.

References

#CVE-2022-26384: iframe allow-scripts sandbox bypass

Reporter
Ed McManus
Impact
high
Description

If an attacker could control the contents of an iframe sandboxed with allow-popups but not allow-scripts, they were able to craft a link that, when clicked, would lead to JavaScript execution in violation of the sandbox.

References

#CVE-2022-26387: Time-of-check time-of-use bug when verifying add-on signatures

Reporter
Armin Ebert
Impact
high
Description

When installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on file could have been modified and Firefox would not have noticed.

References

#CVE-2022-26381: Use-after-free in text reflows

Reporter
Mozilla Fuzzing Team and Hossein Lotfi of Trend Micro Zero Day Initiative
Impact
high
Description

An attacker could have caused a use-after-free by forcing a text reflow in an SVG object leading to a potentially exploitable crash.

References

#CVE-2022-26382: Autofill Text could be exfiltrated via side-channel attacks

Reporter
Young Min Kim
Impact
moderate
Description

While the text displayed in Autofill tooltips cannot be directly read by JavaScript, the text was rendered using page fonts. Side-channel attacks on the text by using specially crafted fonts could have lead to this text being inferred by the webpage.

References

#CVE-2022-26385: Use-after-free in thread shutdown

Reporter
bo13oy of Cyber Kunlun Lab
Impact
moderate
Description

In unusual circumstances, an individual thread may outlive the thread's manager during shutdown. This could have led to a use-after-free causing a potentially exploitable crash.

References

#CVE-2022-0843: Memory safety bugs fixed in Firefox 98

Reporter
Mozilla developers
Impact
moderate
Description

Mozilla developers Kershaw Chang, Ryan VanderMeulen, and Randell Jesup reported memory safety bugs present in Firefox 97. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.

References