CVE-2020-12395

Description

Mozilla developers and community members reported memory safety bugs present in Firefox 75 and Firefox ESR 68.7. 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 ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.23% Top 25%
Vendor Advisory ubuntu.com Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox ESR
Affected: Mozilla Firefox
Affected: Mozilla Thunderbird
Published at:
Updated at:

References

Link Tags
https://www.mozilla.org/security/advisories/mfsa2020-18/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2020-16/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2020-17/ vendor advisory
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1595886%2C1611482%2C1614704%2C1624098%2C1625749%2C1626382%2C1628076%2C1631508 issue tracking broken link
https://usn.ubuntu.com/4373-1/ third party advisory vendor advisory
https://security.gentoo.org/glsa/202005-03 third party advisory
https://security.gentoo.org/glsa/202005-04 third party advisory

Frequently Asked Questions

What is the severity of CVE-2020-12395?
CVE-2020-12395 has been scored as a critical severity vulnerability.
How to fix CVE-2020-12395?
To fix CVE-2020-12395, 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-2020-12395 being actively exploited in the wild?
It is possible that CVE-2020-12395 is being exploited or will be exploited in a near future based on public information. 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-2020-12395?
CVE-2020-12395 affects Mozilla Firefox ESR, Mozilla Firefox, Mozilla Thunderbird.
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