CVE-2020-12395

high-risk
Published 2020-05-26

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.

Do I need to act?

~
1.3% 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

Mozilla Canonical

References (14)

Broken Link https://bugzilla.mozilla.org/buglist.cgi?bug_id=1595886%2C1611482%2C1614704%2C16...
Third Party Advisory https://security.gentoo.org/glsa/202005-03
Third Party Advisory https://security.gentoo.org/glsa/202005-04
Third Party Advisory https://usn.ubuntu.com/4373-1/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-16/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-17/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-18/
Broken Link https://bugzilla.mozilla.org/buglist.cgi?bug_id=1595886%2C1611482%2C1614704%2C16...
Third Party Advisory https://security.gentoo.org/glsa/202005-03
Third Party Advisory https://security.gentoo.org/glsa/202005-04
Third Party Advisory https://usn.ubuntu.com/4373-1/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-16/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-17/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-18/
50
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 4/34 · Minimal
Exposure 14/34 · Moderate