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CVE-2020-6819

Date: April 24, 2020

Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.

Severity Score

Related Resources (10)

https://usn.ubuntu.com/4335-1/
https://access.redhat.com/security/cve/CVE-2020-6819
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-6819
https://security.alpinelinux.org/vuln/CVE-2020-6819
https://bugzilla.mozilla.org/show_bug.cgi?id=1620818
https://security-tracker.debian.org/tracker/CVE-2020-6819
https://nvd.nist.gov/vuln/detail/CVE-2020-6819
https://www.mozilla.org/security/advisories/mfsa2020-11/
https://www.mozilla.org/security/advisories/mfsa2020-14/
https://www.mend.io/vulnerability-database/CVE-2020-6819

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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