CVE-2020-15673

moderate-risk

Published 2020-10-01

Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. 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 < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.

Do I need to act?

0.87% chance of exploitation

EPSS score — low 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

CVSS 8.8/10 High

NETWORK / LOW complexity

Affected Products (7)

Firefox

Firefox Esr

Thunderbird

Debian Linux

Leap

Affected Vendors

Debian Mozilla Opensuse

References (18)

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=1648493%2C1660800

Mailing List https://lists.debian.org/debian-lts-announce/2020/10/msg00020.html

Third Party Advisory https://security.gentoo.org/glsa/202010-02

Third Party Advisory https://www.debian.org/security/2020/dsa-4770

Release Notes https://www.mozilla.org/security/advisories/mfsa2020-42/

Release Notes https://www.mozilla.org/security/advisories/mfsa2020-43/

Release Notes https://www.mozilla.org/security/advisories/mfsa2020-44/