CVE-2020-15683

high-risk
Published 2020-10-22

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.

Do I need to act?

~
1.6% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (7)

Affected Vendors

Debian Mozilla Opensuse

References (22)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00057.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00062.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00074.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00077.html
Broken Link https://bugzilla.mozilla.org/buglist.cgi?bug_id=1576843%2C1656987%2C1660954%2C16...
Mailing List https://lists.debian.org/debian-lts-announce/2020/10/msg00027.html
Third Party Advisory https://security.gentoo.org/glsa/202010-08
Third Party Advisory https://www.debian.org/security/2020/dsa-4780
Release Notes https://www.mozilla.org/security/advisories/mfsa2020-45/
Release Notes https://www.mozilla.org/security/advisories/mfsa2020-46/
Release Notes https://www.mozilla.org/security/advisories/mfsa2020-47/
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00057.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00062.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00074.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00077.html
Broken Link https://bugzilla.mozilla.org/buglist.cgi?bug_id=1576843%2C1656987%2C1660954%2C16...
Mailing List https://lists.debian.org/debian-lts-announce/2020/10/msg00027.html
Third Party Advisory https://security.gentoo.org/glsa/202010-08
Third Party Advisory https://www.debian.org/security/2020/dsa-4780
Release Notes https://www.mozilla.org/security/advisories/mfsa2020-45/
and 2 more references
50
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 4/34 · Minimal
Exposure 14/34 · Moderate