CVE-2019-17021: Race Condition
First published: Tue Jan 07 2020(Updated: )
During the initialization of a new content process, a race condition occurs that can allow a content process to disclose heap addresses from the parent process. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Thunderbird | <68.4.1 | 68.4.1 |
| Firefox | <72 | 72 |
| Firefox ESR | <68.4 | 68.4 |
| Firefox | <72.0 | |
| Firefox ESR | <68.4 | |
| Microsoft Windows Operating System | ||
| SUSE Linux | =15.1 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1599008
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-02/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-01/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-02/#CVE-2019-17016
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-04/
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00029.html
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00043.html
- http://packetstormsecurity.com/files/155912/Slackware-Security-Advisory-mozilla-thunderbird-Updates.html
- https://seclists.org/bugtraq/2020/Jan/18
- https://www.mozilla.org/security/advisories/mfsa2020-01/
- https://www.mozilla.org/security/advisories/mfsa2020-02/
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is CVE-2019-17021?
CVE-2019-17021 is a vulnerability that occurs during the initialization of a new content process in Firefox ESR and Firefox.
How does CVE-2019-17021 affect Mozilla Firefox?
CVE-2019-17021 affects Firefox ESR versions prior to 68.4 and Firefox versions prior to 72.
Which operating systems are affected by CVE-2019-17021?
CVE-2019-17021 only affects Windows operating systems.
What is the severity of CVE-2019-17021?
The severity of CVE-2019-17021 is medium with a CVSS score of 5.3.
How can I fix the CVE-2019-17021 vulnerability?
To fix the CVE-2019-17021 vulnerability, update Firefox ESR to version 68.4 or later, and update Firefox to version 72 or later.
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