CVE-2020-6806
First published: Tue Mar 10 2020(Updated: )
By carefully crafting promise resolutions, it was possible to cause an out-of-bounds read off the end of an array resized during script execution. This could have led to memory corruption and a potentially exploitable crash.
Credit: security@mozilla.org security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Firefox ESR | <68.6 | 68.6 |
| Mozilla Thunderbird | <68.6 | 68.6 |
| redhat/firefox | <68.6 | 68.6 |
| redhat/thunderbird | <68.6 | 68.6 |
| Mozilla Firefox | <74 | 74 |
| Mozilla Firefox | <74.0 | |
| Mozilla Firefox ESR | <68.6.0 | |
| Mozilla Thunderbird | <68.6.0 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =19.10 | |
| debian/firefox | 133.0.3-1 | |
| debian/firefox-esr | 115.14.0esr-1~deb11u1 128.5.0esr-1~deb11u1 128.3.1esr-1~deb12u1 128.5.0esr-1~deb12u1 128.5.0esr-1 128.5.1esr-1 | |
| debian/thunderbird | 1:115.12.0-1~deb11u1 1:128.5.0esr-1~deb11u1 1:115.16.0esr-1~deb12u1 1:128.5.0esr-1~deb12u1 1:128.5.2esr-1 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1612308
- https://www.mozilla.org/security/advisories/mfsa2020-08/
- https://www.mozilla.org/security/advisories/mfsa2020-09/
- https://www.mozilla.org/security/advisories/mfsa2020-10/
- https://usn.ubuntu.com/4328-1/
- https://usn.ubuntu.com/4335-1/
- http://packetstormsecurity.com/files/157524/Firefox-js-ReadableStreamCloseInternal-Out-Of-Bounds-Access.html
- https://launchpad.net/bugs/cve/CVE-2020-6806
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-09/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-10/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-09/#CVE-2020-6806
- https://access.redhat.com/errata/RHSA-2020:0815
- https://access.redhat.com/errata/RHSA-2020:0816
- https://access.redhat.com/security/cve/cve-2020-6806
- https://access.redhat.com/errata/RHSA-2020:0819
- https://access.redhat.com/errata/RHSA-2020:0820
- https://access.redhat.com/errata/RHSA-2020:0905
- https://access.redhat.com/errata/RHSA-2020:0918
- https://access.redhat.com/errata/RHSA-2020:0919
- https://access.redhat.com/errata/RHSA-2020:0914
- https://bugzilla.redhat.com/show_bug.cgi?id=1812200
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/#CVE-2020-6806
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-10/#CVE-2020-6806
- https://security-tracker.debian.org/tracker/CVE-2020-6806
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6806
- https://nvd.nist.gov/vuln/detail/CVE-2020-6806
- https://ubuntu.com/security/CVE-2020-6806
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is CVE-2020-6806?
CVE-2020-6806 is a vulnerability in Mozilla Firefox and Thunderbird that allows for an out-of-bounds read off the end of an array during script execution, potentially leading to memory corruption and a crash.
How does CVE-2020-6806 affect Mozilla Firefox and Thunderbird?
CVE-2020-6806 affects Mozilla Firefox versions up to 74, Mozilla Thunderbird versions up to 68.6, and Mozilla Firefox ESR versions up to 68.6.
What is the severity of CVE-2020-6806?
CVE-2020-6806 has a severity rating of high (7) based on the Common Vulnerability Scoring System (CVSS).
How can I fix CVE-2020-6806?
To fix CVE-2020-6806, upgrade Mozilla Firefox to version 74 or later, Mozilla Thunderbird to version 68.6 or later, or Mozilla Firefox ESR to version 68.6 or later.
Where can I find more information about CVE-2020-6806?
You can find more information about CVE-2020-6806 on the Mozilla Bugzilla and Mozilla security advisories pages.
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