CVE-2020-12420

moderate-risk
Published 2020-07-09

When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.

Do I need to act?

-
0.44% 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
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (9)

Affected Vendors

Mozilla Canonical Opensuse

References (22)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1643437
Third Party Advisory https://security.gentoo.org/glsa/202007-09
Third Party Advisory https://security.gentoo.org/glsa/202007-10
Third Party Advisory https://usn.ubuntu.com/4421-1/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-24/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-25/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-26/
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html
Exploit https://bugzilla.mozilla.org/show_bug.cgi?id=1643437
Third Party Advisory https://security.gentoo.org/glsa/202007-09
Third Party Advisory https://security.gentoo.org/glsa/202007-10
Third Party Advisory https://usn.ubuntu.com/4421-1/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-24/
and 2 more references
47
/ 100
moderate-risk
Severity 30/34 · Critical
Exploitability 2/34 · Minimal
Exposure 15/34 · Moderate