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 Software | Affected Version | How 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 | |
| debian/firefox | 132.0.1-1 | |
| debian/firefox-esr | 115.14.0esr-1~deb11u1 128.4.0esr-1~deb11u1 128.3.1esr-1~deb12u1 128.4.0esr-1~deb12u1 128.3.1esr-2 128.4.0esr-1 | |
| debian/thunderbird | 1:115.12.0-1~deb11u1 1:128.4.0esr-1~deb11u1 1:115.16.0esr-1~deb12u1 1:128.4.0esr-1~deb12u1 1:128.4.0esr-1 1:128.4.2esr-1 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1542465
- https://www.mozilla.org/security/advisories/mfsa2019-13/
- https://www.mozilla.org/security/advisories/mfsa2019-14/
- https://www.mozilla.org/security/advisories/mfsa2019-15/
- https://launchpad.net/bugs/cve/CVE-2019-11691
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-14/#CVE-2019-11691
- https://access.redhat.com/errata/RHSA-2019:1265
- https://access.redhat.com/errata/RHSA-2019:1267
- https://access.redhat.com/errata/RHSA-2019:1269
- https://access.redhat.com/errata/RHSA-2019:1308
- https://access.redhat.com/errata/RHSA-2019:1309
- https://access.redhat.com/errata/RHSA-2019:1310
- https://bugzilla.redhat.com/show_bug.cgi?id=1712617
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-15/
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-14/
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-13/
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-13/#CVE-2019-11693
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-13/#CVE-2019-11691
- https://www.mozilla.org/en-US/security/advisories/mfsa2019-15/#CVE-2019-11691
- https://security-tracker.debian.org/tracker/CVE-2019-11691
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11691
- https://nvd.nist.gov/vuln/detail/CVE-2019-11691
- https://ubuntu.com/security/CVE-2019-11691
Peer vulnerabilities
(Found alongside the following vulnerabilities)
- CVE-2019-9815
- CVE-2019-9816
- CVE-2019-9817
- CVE-2019-9818
- CVE-2019-9819
- CVE-2019-9820
- CVE-2019-11691
- CVE-2019-11692
- CVE-2019-11693
- CVE-2019-7317
- CVE-2019-9797
- CVE-2018-18511
- CVE-2019-11694
- CVE-2019-11698
- CVE-2019-5798
- CVE-2019-9800
- CVE-2019-9821
- CVE-2019-11695
- CVE-2019-11696
- CVE-2019-11697
- CVE-2019-11700
- CVE-2019-11699
- CVE-2019-11701
- CVE-2019-9814
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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