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CVE-2020-15656

Date: August 10, 2020

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.

Severity Score

Related Resources (11)

https://usn.ubuntu.com/4443-1/
https://www.mozilla.org/security/advisories/mfsa2020-30/
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-15656
https://security.alpinelinux.org/vuln/CVE-2020-15656
https://access.redhat.com/security/cve/CVE-2020-15656
https://nvd.nist.gov/vuln/detail/CVE-2020-15656
https://www.mozilla.org/security/advisories/mfsa2020-33/
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
https://bugzilla.mozilla.org/show_bug.cgi?id=1647293
https://www.mozilla.org/security/advisories/mfsa2020-32/
https://www.mend.io/vulnerability-database/CVE-2020-15656

Severity Score

Weakness Type (CWE)

Access of Resource Using Incompatible Type ('Type Confusion')

CWE-843

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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