CVE-2020-15673: Use After Free
First published: Tue Sep 22 2020(Updated: )
Mozilla developer Jason Kratzer reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. 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 |
|---|---|---|
| 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 | |
| Thunderbird | <78.3 | 78.3 |
| Firefox | <81.0 | |
| Firefox ESR | <78.3 | |
| Thunderbird | <78.3 | |
| Debian | =9.0 | |
| Debian | =10.0 | |
| SUSE Linux | =15.1 | |
| SUSE Linux | =15.2 | |
| Firefox | <81 | 81 |
| Firefox ESR | <78.3 | 78.3 |
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Reference Links
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1648493%2C1660800
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-44/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-42/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-43/
- 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/msg00020.html
- https://security.gentoo.org/glsa/202010-02
- https://www.debian.org/security/2020/dsa-4770
- https://www.mozilla.org/security/advisories/mfsa2020-42/
- https://www.mozilla.org/security/advisories/mfsa2020-43/
- https://www.mozilla.org/security/advisories/mfsa2020-44/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-42/#CVE-2020-15673
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-43/#CVE-2020-15673
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-44/#CVE-2020-15673
- https://security-tracker.debian.org/tracker/CVE-2020-15673
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the severity of CVE-2020-15673?
CVE-2020-15673 has a high severity level due to the potential for memory corruption leading to arbitrary code execution.
How do I fix CVE-2020-15673?
To fix CVE-2020-15673, update to the latest version of Mozilla Firefox, Firefox ESR, or Thunderbird as specified in the remediation instructions.
Which versions of Firefox are affected by CVE-2020-15673?
CVE-2020-15673 affects Firefox versions prior to 81.
What platforms are impacted by CVE-2020-15673?
CVE-2020-15673 impacts various platforms using affected versions of Firefox, Firefox ESR, and Thunderbird.
Is CVE-2020-15673 being actively exploited?
There is no public information confirming that CVE-2020-15673 is being actively exploited, but it is recommended to apply patches to mitigate risks.
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