CVE-2020-15683

Description

Mozilla developers and community members reported memory safety bugs present in Firefox 81 and Firefox ESR 78.3. 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 < 78.4, Firefox < 82, and Thunderbird < 78.4.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.57% Top 20%
Vendor Advisory opensuse.org Vendor Advisory debian.org Vendor Advisory opensuse.org Vendor Advisory gentoo.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory mozilla.org 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/mfsa2020-45/ release notes vendor advisory
https://www.mozilla.org/security/advisories/mfsa2020-47/ release notes vendor advisory
https://www.mozilla.org/security/advisories/mfsa2020-46/ release notes vendor advisory
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1576843%2C1656987%2C1660954%2C1662760%2C1663439%2C1666140 issue tracking vendor advisory broken link
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00057.html mailing list third party advisory vendor advisory
https://www.debian.org/security/2020/dsa-4780 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00062.html mailing list third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00027.html third party advisory mailing list
https://security.gentoo.org/glsa/202010-08 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00074.html mailing list third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00077.html mailing list third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-15683?
CVE-2020-15683 has been scored as a critical severity vulnerability.
How to fix CVE-2020-15683?
To fix CVE-2020-15683, 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-2020-15683 being actively exploited in the wild?
It is possible that CVE-2020-15683 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-15683?
CVE-2020-15683 affects Mozilla Firefox ESR, Mozilla Firefox, Mozilla Thunderbird.
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