This update contains a good number of security fixes.
As described in the Mozilla Foundation Security Advisory, seven CVEs were fixes, where five out of them with high impact level. Below is the list of flaws fixed.
CVE-2022-38472
An attacker could have abused XSLT error handling to associate attacker-controlled content with another origin which was displayed in the address bar. This could have been used to fool the user into submitting data intended for the spoofed origin.
CVE-2022-38473
A cross-origin iframe referencing an XSLT document would inherit the parent domain's permissions (such as microphone or camera access).
CVE-2022-38474
A website that had permission to access the microphone could record audio without the audio notification being shown. This bug does not allow the attacker to bypass the permission prompt - it only affects the notification shown once permission has been granted. This bug only affects Firefox for Android. Other operating systems are unaffected.
CVE-2022-38475
An attacker could have written a value to the first element in a zero-length JavaScript array. Although the array was zero-length, the value was not written to an invalid memory address.
CVE-2022-38477
Mozilla developer Nika Layzell and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 103 and Firefox ESR 102.1. 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.
CVE-2022-38478
Members the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 103, Firefox ESR 102.1, and Firefox ESR 91.12. 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.
Conclusion
Never ignore security updates for your operating system, they are not just to consume your internet traffic!
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