CVE-2020-15683: Use After Free
First published: Tue Oct 20 2020(Updated: )
Mozilla developers and community members Jason Kratzer, Simon Giesecke, Philipp, and Christian Holler reported memory safety bugs present in Firefox 81 and Firefox ESR 78.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Firefox | <82 | 82 |
| <82 | 82 | |
| <78.4 | 78.4 | |
| <78.4 | 78.4 | |
| Mozilla Firefox | <82.0 | |
| Mozilla Firefox ESR | <78.4 | |
| Mozilla Thunderbird | <78.4 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| openSUSE Leap | =15.1 | |
| openSUSE Leap | =15.2 | |
| debian/firefox | 118.0.2-1 | |
| debian/firefox-esr | 91.12.0esr-1~deb10u1 115.3.1esr-1~deb10u1 102.15.0esr-1~deb11u1 115.3.1esr-1~deb11u1 102.15.1esr-1~deb12u1 115.3.0esr-1~deb12u1 115.3.0esr-1 | |
| debian/thunderbird | 1:91.12.0-1~deb10u1 1:115.3.1-1~deb10u1 1:102.13.1-1~deb11u1 1:115.3.1-1~deb11u1 1:102.15.1-1~deb12u1 1:115.3.1-1~deb12u1 1:115.3.1-1 |
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Reference Links
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1576843%2C1656987%2C1660954%2C1662760%2C1663439%2C1666140
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-45/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-46/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-47/
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00057.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00062.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00074.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00077.html
- https://lists.debian.org/debian-lts-announce/2020/10/msg00027.html
- https://security.gentoo.org/glsa/202010-08
- https://www.debian.org/security/2020/dsa-4780
- https://www.mozilla.org/security/advisories/mfsa2020-45/
- https://www.mozilla.org/security/advisories/mfsa2020-46/
- https://www.mozilla.org/security/advisories/mfsa2020-47/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-45/#CVE-2020-15683
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-46/#CVE-2020-15683
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-47/#CVE-2020-15683
- https://security-tracker.debian.org/tracker/CVE-2020-15683
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is CVE-2020-15683?
CVE-2020-15683 is a memory safety bug present in Firefox 81 and Firefox ESR 78.3.
What is the severity of CVE-2020-15683?
CVE-2020-15683 has a severity level of high (7).
How can I fix CVE-2020-15683?
To fix CVE-2020-15683, update your Mozilla Firefox to version 82 or higher.
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