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CVE-2020-12387

Date: May 26, 2020

A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.

Severity Score

Related Resources (13)

https://security.gentoo.org/glsa/202005-04
https://usn.ubuntu.com/4373-1/
https://www.mozilla.org/security/advisories/mfsa2020-18/
https://security.gentoo.org/glsa/202005-03
https://www.mozilla.org/security/advisories/mfsa2020-17/
https://bugzilla.mozilla.org/show_bug.cgi?id=1545345
https://access.redhat.com/security/cve/CVE-2020-12387
https://nvd.nist.gov/vuln/detail/CVE-2020-12387
https://www.mozilla.org/security/advisories/mfsa2020-16/
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-12387
https://security.alpinelinux.org/vuln/CVE-2020-12387
https://security-tracker.debian.org/tracker/CVE-2020-12387
https://www.mend.io/vulnerability-database/CVE-2020-12387

Severity Score

Weakness Type (CWE)

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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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