Security Vulnerabilities fixed in Firefox 88

• I have a batch file which silently installs Firefox and this works fine. (I add -ms to the line where I execute the installation file.). Now I want to update Firefox in the same batch file only if it's not the newest Version. The version test is already in the batch file and is working fine.
• Starting with Firefox 52 in March 2017, plugins other than Adobe Flash are no longer supported in Firefox. Firefox Extended Support Release 52 continued to support non-Flash plugins until mid-2018. Starting with Firefox 55 in August 2017, users must choose which sites are allowed to activate the Flash plugin.

Update on Firefox Send and Firefox Notes September 17, 2020 Fast, personalized and private by design on all platforms: introducing a new Firefox for Android experience. Gather in this interactive, online, multi-dimensional social space. Firefox Developer Edition. Get the Firefox browser built just for developers. Check out the home for web developer resources. Firefox Reality. Explore the web with the Firefox browser for virtual reality. The Facebook Container extension for Firefox helps you take control and isolate your web activity from Facebook. Rated 4.5 out of 5. Mozilla Firefox. 1,887,615 users.

• Firefox 88

#CVE-2021-23994: Out of bound write due to lazy initialization

Reporter

Abraruddin Khan and Omair

Impact

high

Description

A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of bound write.

References

#CVE-2021-23995: Use-after-free in Responsive Design Mode

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Reporter

Irvan Kurniawan

Impact

high

Description

When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code.

References

#CVE-2021-23996: Content rendered outside of webpage viewport

Reporter

Colin D. Munro

Impact

high

Description

By utilizing 3D CSS in conjunction with Javascript, content could have been rendered outside the webpage's viewport, resulting in a spoofing attack that could have been used for phishing or other attacks on a user.

References

#CVE-2021-23997: Use-after-free when freeing fonts from cache

Reporter

Irvan Kurniawan

Impact

high

Description

Due to unexpected data type conversions, a use-after-free could have occurred when interacting with the font cache. We presume that with enough effort this could have been exploited to run arbitrary code.

References

#CVE-2021-23998: Secure Lock icon could have been spoofed

Reporter

Jordi Chancel

Impact

moderate

Description

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Through complicated navigations with new windows, an HTTP page could have inherited a secure lock icon from an HTTPS page.

References

#CVE-2021-23999: Blob URLs may have been granted additional privileges

Reporter

Nika Layzell

Impact

moderate

Description

If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content.

References

#CVE-2021-24000: requestPointerLock() could be applied to a tab different from the visible tab

Reporter

Irvan Kurniawan

Impact

moderate

Description

A race condition with requestPointerLock() and setTimeout() could have resulted in a user interacting with one tab when they believed they were on a separate tab. In conjunction with certain elements (such as <input type='file'>) this could have led to an attack where a user was confused about the origin of the webpage and potentially disclosed information they did not intend to.

References

#CVE-2021-24001: Testing code could have enabled session history manipulations by a compromised content process

Reporter

Andrew McCreight

Impact

moderate

Description

A compromised content process could have performed session history manipulations it should not have been able to due to testing infrastructure that was not restricted to testing-only configurations.

References

#CVE-2021-24002: Arbitrary FTP command execution on FTP servers using an encoded URL

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Reporter

Daniel Santos

Impact

moderate

Description

When a user clicked on an FTP URL containing encoded newline characters (%0A and %0D), the newlines would have been interpreted as such and allowed arbitrary commands to be sent to the FTP server.

References

#CVE-2021-29945: Incorrect size computation in WebAssembly JIT could lead to null-reads

Reporter

Christian Holler

Impact

moderate

Description

The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash.
Note: This issue only affected x86-32 platforms. Other platforms are unaffected.

References

#CVE-2021-29944: HTML injection vulnerability in Firefox for Android's Reader View

Reporter

Wladimir Palant working with Include Security

Impact

low

Description

Lack of escaping allowed HTML injection when a webpage was viewed in Reader View. While a Content Security Policy prevents direct code execution, HTML injection is still possible.
Note: This issue only affected Firefox for Android. Other operating systems are unaffected.

References

#CVE-2021-29946: Port blocking could be bypassed

Reporter

Frederik Braun

Impact

low

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Description

Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header.

References

#CVE-2021-29947: Memory safety bugs fixed in Firefox 88

Reporter

Mozilla developers and community

Impact

high

Mozilla Firefox Update 2021

Description

Mozilla developers and community members Ryan VanderMeulen, Sean Feng, Tyson Smith, Julian Seward, Christian Holler reported memory safety bugs present in Firefox 87. 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.

Mozilla Firefox Updates 2020

References