CVE-2020-6819: Mozilla Firefox And Thunderbird Use-After-Free Vulnerability
First published: Fri Apr 03 2020(Updated: )
Last updated 21 August 2024
Credit: security@mozilla.org security@mozilla.org security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Thunderbird | <68.7 | 68.7 |
| Mozilla Firefox | <74.0.1 | 74.0.1 |
| Mozilla Firefox ESR | <68.6.1 | 68.6.1 |
| Mozilla Firefox | <74.0.1 | |
| Mozilla Firefox ESR | <68.6.1 | |
| Mozilla Thunderbird | <68.7.0 | |
| Mozilla Firefox and Thunderbird | ||
| debian/firefox | 132.0.1-1 | |
| debian/firefox-esr | 115.14.0esr-1~deb11u1 128.4.0esr-1~deb11u1 128.3.1esr-1~deb12u1 128.4.0esr-1~deb12u1 128.3.1esr-2 128.4.0esr-1 | |
| debian/thunderbird | 1:115.12.0-1~deb11u1 1:128.4.0esr-1~deb11u1 1:115.16.0esr-1~deb12u1 1:128.4.0esr-1~deb12u1 1:128.4.0esr-1 1:128.4.2esr-1 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1620818
- https://www.mozilla.org/security/advisories/mfsa2020-11/
- https://www.mozilla.org/security/advisories/mfsa2020-14/
- https://usn.ubuntu.com/4335-1/
- https://launchpad.net/bugs/cve/CVE-2020-6819
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-14/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-11/
- https://nvd.nist.gov/vuln/detail/CVE-2020-6819
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-11/#CVE-2020-6819
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-14/#CVE-2020-6819
- https://security-tracker.debian.org/tracker/CVE-2020-6819
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6819
- https://ubuntu.com/security/CVE-2020-6819
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is CVE-2020-6819?
CVE-2020-6819 is a use-after-free vulnerability in Mozilla Firefox and Thunderbird.
Which software is affected by CVE-2020-6819?
Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1 are affected by CVE-2020-6819.
What is the severity of CVE-2020-6819?
CVE-2020-6819 has a severity rating of 8.1 (critical).
Are there any known attacks exploiting CVE-2020-6819?
Yes, there are targeted attacks in the wild abusing this vulnerability.
How can I fix CVE-2020-6819?
Update Thunderbird to version >= 68.7.0, Firefox to version >= 74.0.1, or Firefox ESR to version >= 68.6.1 to fix CVE-2020-6819.
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