CVE-2020-15656

moderate-risk
Published 2020-08-10

JIT optimizations involving the Javascript arguments object could confuse later optimizations. This risk was already mitigated by various precautions in the code, resulting in this bug rated at only moderate severity. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

Do I need to act?

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0.69% 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 Opensuse

References (12)

Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1647293
Third Party Advisory https://usn.ubuntu.com/4443-1/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-30/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-32/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-33/
Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1647293
Third Party Advisory https://usn.ubuntu.com/4443-1/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-30/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-32/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2020-33/
46
/ 100
moderate-risk
Severity 30/34 · Critical
Exploitability 2/34 · Minimal
Exposure 14/34 · Moderate