CVE-2020-12405: Race Condition

Reference Links

• https://bugzilla.mozilla.org/show_bug.cgi?id=1631618
• https://www.mozilla.org/en-US/security/advisories/mfsa2020-22/
• https://www.mozilla.org/security/advisories/mfsa2020-20/
• https://www.mozilla.org/security/advisories/mfsa2020-21/
• https://www.mozilla.org/security/advisories/mfsa2020-22/
• https://usn.ubuntu.com/4421-1/
• https://launchpad.net/bugs/cve/CVE-2020-12405
• https://www.mozilla.org/en-US/security/advisories/mfsa2020-21/
• https://www.mozilla.org/en-US/security/advisories/mfsa2020-22/#CVE-2020-12410
• https://www.mozilla.org/en-US/security/advisories/mfsa2020-20/
• https://www.mozilla.org/en-US/security/advisories/mfsa2020-20/#CVE-2020-12405
• https://www.mozilla.org/en-US/security/advisories/mfsa2020-21/#CVE-2020-12405
• https://www.mozilla.org/en-US/security/advisories/mfsa2020-22/#CVE-2020-12405
• https://security-tracker.debian.org/tracker/CVE-2020-12405
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12405
• https://nvd.nist.gov/vuln/detail/CVE-2020-12405
• https://ubuntu.com/security/CVE-2020-12405

Parent vulnerabilities

(Appears in the following advisories)

• MFSA2020-22
• MFSA2020-21
• MFSA2020-20

Peer vulnerabilities

(Found alongside the following vulnerabilities)

• CVE-2020-12399
• CVE-2020-12405
• CVE-2020-12406
• CVE-2020-12410
• CVE-2020-12398
• CVE-2020-12407
• CVE-2020-12408
• CVE-2020-12409
• CVE-2020-12411

Frequently Asked Questions

• What is CVE-2020-12405?

  CVE-2020-12405 is a vulnerability that can occur in Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9 when browsing a malicious page, leading to a potentially exploitable crash due to a race condition in the SharedWorkerService.

• How severe is CVE-2020-12405?

  CVE-2020-12405 has a severity rating of 5.3 (high).

• Which software versions are affected by CVE-2020-12405?

  Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9 are affected by CVE-2020-12405.

• How can I fix CVE-2020-12405?

  To fix CVE-2020-12405, update Thunderbird to 68.9.0 or later, update Firefox to 77.0.1 or later, and update Firefox ESR to 68.9.0 or later.

• Where can I find more information about CVE-2020-12405?

  You can find more information about CVE-2020-12405 at the following references: [Mozilla Bugzilla](https://bugzilla.mozilla.org/show_bug.cgi?id=1631618), [Mozilla Security Advisory](https://www.mozilla.org/en-US/security/advisories/mfsa2020-22/), [Mozilla Security Advisories](https://www.mozilla.org/security/advisories/mfsa2020-20/).