CWE
416
Advisory Published
CVE Published
Updated

CVE-2019-9790: Use After Free

First published: Tue Mar 19 2019(Updated: )

A use-after-free vulnerability can occur when a raw pointer to a DOM element on a page is obtained using JavaScript and the element is then removed while still in use. This results in a potentially exploitable crash.

Credit: security@mozilla.org security@mozilla.org

Affected SoftwareAffected VersionHow to fix
Mozilla Thunderbird<60.6
60.6
Mozilla Firefox ESR<60.6
60.6
Mozilla Firefox<66
66
Mozilla Firefox<=66.0
Mozilla Firefox ESR<=60.6
Mozilla Thunderbird<=60.6
debian/firefox
132.0.2-1
debian/firefox-esr
115.14.0esr-1~deb11u1
128.4.0esr-1~deb11u1
128.3.1esr-1~deb12u1
128.4.0esr-1~deb12u1
128.4.0esr-1
debian/thunderbird
1:115.12.0-1~deb11u1
1:128.4.3esr-1~deb11u1
1:115.16.0esr-1~deb12u1
1:128.4.3esr-1~deb12u1
1:128.4.3esr-1
<=66.0
<=60.6
<=60.6

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2019-9790?

    CVE-2019-9790 is a use-after-free vulnerability in Mozilla Firefox and Thunderbird.

  • How does CVE-2019-9790 occur?

    CVE-2019-9790 occurs when a raw pointer to a DOM element is obtained using JavaScript and the element is then removed while still in use.

  • Which software is affected by CVE-2019-9790?

    CVE-2019-9790 affects Thunderbird versions less than 60.6, Firefox ESR versions less than 60.6, and Firefox versions less than 66.

  • What is the severity of CVE-2019-9790?

    CVE-2019-9790 has a severity rating of critical.

  • How can I fix CVE-2019-9790?

    To fix CVE-2019-9790, update to Mozilla Firefox version 66 or higher, or update to Thunderbird version 60.6 or higher.

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