critical
9.8
CWE
416
Advisory Published
Updated

CVE-2019-11691: Use After Free

First published: Tue May 21 2019(Updated: )

A use-after-free vulnerability can occur when working with `XMLHttpRequest` (XHR) in an event loop, causing the XHR main thread to be called after it has been freed. This results in a potentially exploitable crash. External Reference: <a href="https://www.mozilla.org/en-US/security/advisories/mfsa2019-14/#CVE-2019-11691">https://www.mozilla.org/en-US/security/advisories/mfsa2019-14/#CVE-2019-11691</a>

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

Affected SoftwareAffected VersionHow to fix
Mozilla Thunderbird<60.7
60.7
Mozilla Firefox ESR<60.7
60.7
Mozilla Firefox<67
67
Mozilla Firefox<67.0
Mozilla Firefox ESR<60.7
Mozilla Thunderbird<60.7
ubuntu/firefox<67.0+
67.0+
ubuntu/firefox<67.0+
67.0+
ubuntu/firefox<67.0+
67.0+
ubuntu/firefox<67.0+
67.0+
ubuntu/firefox<67.0+
67.0+
ubuntu/firefox<67.0+
67.0+
ubuntu/firefox<67.0+
67.0+
ubuntu/firefox<67.0+
67.0+
ubuntu/firefox<67.0+
67.0+
ubuntu/firefox<67.0+
67.0+
ubuntu/firefox<67.0+
67.0+
ubuntu/firefox<67.0+
67.0+
ubuntu/firefox<67.0+
67.0+
ubuntu/firefox<67.0
67.0
ubuntu/firefox<67.0+
67.0+
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
ubuntu/thunderbird<60.7
60.7
ubuntu/thunderbird<1:60.7.0+
1:60.7.0+
debian/firefox
125.0.3-1
debian/firefox-esr
91.12.0esr-1~deb10u1
115.10.0esr-1~deb10u1
115.7.0esr-1~deb11u1
115.10.0esr-1~deb11u1
115.7.0esr-1~deb12u1
115.10.0esr-1~deb12u1
115.10.0esr-1
debian/thunderbird
1:91.12.0-1~deb10u1
1:115.10.1-1~deb10u1
1:115.7.0-1~deb11u1
1:115.10.1-1~deb11u1
1:115.7.0-1~deb12u1
1:115.10.1-1~deb12u1
1:115.10.1-1

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2019-11691?

    CVE-2019-11691 is a use-after-free vulnerability that can occur when working with XMLHttpRequest (XHR) in an event loop, causing a potentially exploitable crash in Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

  • How does CVE-2019-11691 affect Mozilla Firefox?

    CVE-2019-11691 affects Mozilla Firefox versions up to exclusive 67.

  • How does CVE-2019-11691 affect Mozilla Firefox ESR?

    CVE-2019-11691 affects Mozilla Firefox ESR versions up to exclusive 60.7.

  • How does CVE-2019-11691 affect Thunderbird?

    CVE-2019-11691 affects Thunderbird versions up to exclusive 60.7.

  • What is the severity of CVE-2019-11691?

    The severity of CVE-2019-11691 is critical, with a CVSS score of 9.8.

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