CVE-2023-6863

Description

The `ShutdownObserver()` was susceptible to potentially undefined behavior due to its reliance on a dynamic type that lacked a virtual destructor. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

8.8

CVSS

Severity: High

CVSS 3.1 •

EPSS 0.42%

Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org

Affected: Mozilla Firefox ESR

Affected: Mozilla Thunderbird

Affected: Mozilla Firefox

References

Link	Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1868901	issue tracking
https://www.mozilla.org/security/advisories/mfsa2023-54/	vendor advisory
https://www.mozilla.org/security/advisories/mfsa2023-55/	vendor advisory
https://www.mozilla.org/security/advisories/mfsa2023-56/	vendor advisory
https://www.debian.org/security/2023/dsa-5581	third party advisory
https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html	third party advisory mailing list
https://security.gentoo.org/glsa/202401-10	third party advisory

Frequently Asked Questions

What is the severity of CVE-2023-6863?: CVE-2023-6863 has been scored as a high severity vulnerability.
How to fix CVE-2023-6863?: To fix CVE-2023-6863, 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-2023-6863 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2023-6863 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-2023-6863?: CVE-2023-6863 affects Mozilla Firefox ESR, Mozilla Thunderbird, Mozilla Firefox.

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