CVE-2019-11692: Use After Free

Published May 21, 2019
·
Updated

A use-after-free vulnerability can occur when listeners are removed from the event listener manager while still in use, resulting in a potentially exploitable crash.

Affected Software

25 affected componentsFixes available
Mozilla Thunderbird<60.7
60.7
Mozilla Firefox<67.0
Mozilla Firefox ESR<60.7.0
Mozilla Thunderbird<60.7.0
Mozilla Firefox<67
67
Mozilla Firefox ESR<60.7
60.7
Mozilla Firefox<60.7.0
debian/firefox
159.0-1
debian/firefox-esr
140.12.0esr-1~deb12u1153.6.0esr-1~deb12u2140.15.0esr-1~deb13u1153.6.0esr-1~deb13u1153.5.1esr-1153.6.0esr-1
debian/thunderbird
1:140.12.0esr-1~deb12u11:153.6.0esr-1~deb12u21:140.12.0esr-1~deb13u11:153.6.0esr-1~deb13u11:153.5.0esr-11:153.6.0esr-1
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0
alpine/firefox-esr<60.7.0-r0
60.7.0-r0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Thunderbird to a version that resolves this vulnerability.

    Fixed in 60.7
  2. Upgrade

    Upgrade Firefox to a version that resolves this vulnerability.

    Fixed in 67
  3. Upgrade

    Upgrade Firefox ESR to a version that resolves this vulnerability.

    Fixed in 60.7
  4. Upgrade

    Upgrade debian/firefox to a version that resolves this vulnerability.

    Fixed in 159.0-1
  5. Upgrade

    Upgrade debian/firefox-esr to a version that resolves this vulnerability.

    Fixed in 140.12.0esr-1~deb12u1Fixed in 153.6.0esr-1~deb12u2Fixed in 140.15.0esr-1~deb13u1Fixed in 153.6.0esr-1~deb13u1Fixed in 153.5.1esr-1Fixed in 153.6.0esr-1
  6. Upgrade

    Upgrade debian/thunderbird to a version that resolves this vulnerability.

    Fixed in 1:140.12.0esr-1~deb12u1Fixed in 1:153.6.0esr-1~deb12u2Fixed in 1:140.12.0esr-1~deb13u1Fixed in 1:153.6.0esr-1~deb13u1Fixed in 1:153.5.0esr-1Fixed in 1:153.6.0esr-1

Event History

May 21, 2019
CVE Published
12:00 AM
May 22, 2019
Data Sourced
via Red Hat·01:42 AM
DescriptionSeverityAffected Software
Jul 23, 2019
CVE Published
via MITRE·01:23 PM
Data Sourced
via MITRE·01:23 PM
DescriptionWeakness
Data Sourced
via NVD·02:15 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·02:15 PM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is CVE-2019-11692?

CVE-2019-11692 is a use-after-free vulnerability that can occur when listeners are removed from the event listener manager while still in use.

2

Which software is affected by CVE-2019-11692?

CVE-2019-11692 affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

3

How severe is CVE-2019-11692?

CVE-2019-11692 has a severity rating of 9.8 out of 10. It is classified as critical.

4

How can I fix CVE-2019-11692?

To fix CVE-2019-11692, update Thunderbird to version 60.7 or later, update Firefox to version 67 or later, or update Firefox ESR to version 60.7 or later.

5

Where can I find more information about CVE-2019-11692?

You can find more information about CVE-2019-11692 on the Mozilla Bugzilla page and the Mozilla Security Advisories page.

Contact

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