CVE-2023-4056

Description

Memory safety bugs present in Firefox 115, Firefox ESR 115.0, Firefox ESR 102.13, Thunderbird 115.0, and Thunderbird 102.13. 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. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.56%
Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Affected: Mozilla Firefox ESR
Affected: Mozilla Firefox ESR
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1820587%2C1824634%2C1839235%2C1842325%2C1843847 issue tracking broken link
https://www.mozilla.org/security/advisories/mfsa2023-29/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2023-30/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2023-31/ vendor advisory
https://www.debian.org/security/2023/dsa-5464 third party advisory mailing list
https://www.debian.org/security/2023/dsa-5469 third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2023/08/msg00008.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2023/08/msg00010.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2023-4056?
CVE-2023-4056 has been scored as a critical severity vulnerability.
How to fix CVE-2023-4056?
To fix CVE-2023-4056, 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-2023-4056 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-4056 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-4056?
CVE-2023-4056 affects Mozilla Firefox, Mozilla Firefox ESR, Mozilla Firefox ESR.
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