CVE-2019-9821

CVSS V2 Medium 6.8 CVSS V3 High 8.1

Description

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.

Overview

CVE ID
CVE-2019-9821

Assigner
security@mozilla.org

Vulnerability Status
Analyzed

Published Version
2019-07-23T14:15:17

Last Modified Date
2021-07-21T11:39:23

Weakness Enumerations

CWE	URL
CWE-362	http://cwe.mitre.org/data/definitions/362.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:mozilla:firefox::::::::	1	OR		67.0

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:M/Au:N/C:P/I:P/A:P

Access Vector
NETWORK

Access Compatibility
MEDIUM

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
PARTIAL

Availability Impact
PARTIAL

Base Score
6.8

Severity
MEDIUM

Exploitability Score
8.6

Impact Score
6.4

CVSS Version 3

Version
3.0

Vector String
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK

Attack Compatibility
HIGH

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
8.1

Base Severity
HIGH

Exploitability Score
2.2

Impact Score
5.9

References

Reference URL	Reference Tags
https://www.mozilla.org/security/advisories/mfsa2019-13/	Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1539125	Permissions Required Vendor Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2019-9821
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9821

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 07:00:08				Added to TrackCVE
2022-12-03 23:40:28	2019-07-23T14:15Z	2019-07-23T14:15:17	CVE Published Date	updated
2022-12-03 23:40:28		2021-07-21T11:39:23	CVE Modified Date	updated
2022-12-03 23:40:28		Analyzed	Vulnerability Status	updated