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CVE-2019-9821

Date: July 23, 2019

A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers. This results in a potentially exploitable crash. This vulnerability affects Firefox < 67.

Language: Unix

Severity Score

Related Resources (5)

https://people.canonical.com/~ubuntu-security/cve/CVE-2019-9821
https://nvd.nist.gov/vuln/detail/CVE-2019-9821
https://bugzilla.mozilla.org/show_bug.cgi?id=1539125
https://www.mozilla.org/security/advisories/mfsa2019-13/
https://www.mend.io/vulnerability-database/CVE-2019-9821

Severity Score

Weakness Type (CWE)

Race Conditions

CWE-362

Use After Free

CWE-416

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
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): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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