CVE-2020-15681 : When multiple WASM threads had a reference to a module, and were looking up expo

When multiple WASM threads had a reference to a module, and were looking up exported functions, one WASM thread could have overwritten another's entry in a shared stub table, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 82.

Published 2020-10-22 21:15:13

Updated 2020-10-30 12:58:49

Source Mozilla Corporation

View at NVD, CVE.org

Products affected by CVE-2020-15681

Mozilla » Firefox
Versions before (<) 82.0
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2020-15681

EPSS FAQ

0.43%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 60 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-15681

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

References for CVE-2020-15681

https://www.mozilla.org/security/advisories/mfsa2020-45/

Security Vulnerabilities fixed in Firefox 82 — Mozilla
Release Notes;Vendor Advisory

CVEs referencing this url
https://bugzilla.mozilla.org/show_bug.cgi?id=1666568

Access Denied
Issue Tracking;Permissions Required;Vendor Advisory

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Vulnerability Details : CVE-2020-15681

Products affected by CVE-2020-15681

Exploit prediction scoring system (EPSS) score for CVE-2020-15681

CVSS scores for CVE-2020-15681

References for CVE-2020-15681