CVE-2023-4583

Description

When checking if the Browsing Context had been discarded in `HttpBaseChannel`, if the load group was not available then it was assumed to have already been discarded which was not always the case for private channels after the private session had ended. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.10%
Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Affected: Mozilla Firefox ESR
Affected: Mozilla Thunderbird
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1842030 issue tracking
https://www.mozilla.org/security/advisories/mfsa2023-34/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2023-36/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2023-38/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-4583?
CVE-2023-4583 has been scored as a high severity vulnerability.
How to fix CVE-2023-4583?
To fix CVE-2023-4583, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-4583 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-4583 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-4583?
CVE-2023-4583 affects Mozilla Firefox, Mozilla Firefox ESR, Mozilla Thunderbird.
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