CVE-2020-12406

moderate-risk
Published 2020-07-09

Mozilla Developer Iain Ireland discovered a missing type check during unboxed objects removal, resulting in a crash. We presume that with enough effort that it could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.

Do I need to act?

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0.35% chance of exploitation
EPSS score — low exploit probability
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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 (7)

Affected Vendors

Mozilla Canonical

References (10)

Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1639590
Third Party Advisory https://usn.ubuntu.com/4421-1/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-20/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-21/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-22/
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1639590
Third Party Advisory https://usn.ubuntu.com/4421-1/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-20/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-21/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-22/
45
/ 100
moderate-risk
Severity 30/34 · Critical
Exploitability 1/34 · Minimal
Exposure 14/34 · Moderate