CVE-2019-9792

Impact:
Critical
Public Date:
2019-03-20
Bugzilla:
1690677: CVE-2019-9792 Mozilla: IonMonkey leaks JS_OPTIMIZED_OUT magic value to script

The MITRE CVE dictionary describes this issue as:

The IonMonkey just-in-time (JIT) compiler can leak an internal JS_OPTIMIZED_OUT magic value to the running script during a bailout. This magic value can then be used by JavaScript to achieve memory corruption, which results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Find out more about CVE-2019-9792 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

In general, this flaw be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but are potentially risks in browser or browser-like contexts.

CVSS v3 metrics

CVSS3 Base Score 8.8
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 6 (thunderbird) RHSA-2019:0680 2019-03-28
Red Hat Enterprise Linux 6 (firefox) RHSA-2019:0623 2019-03-20
Red Hat Enterprise Linux 7 (thunderbird) RHSA-2019:0681 2019-03-28
Red Hat Enterprise Linux 7 (firefox) RHSA-2019:0622 2019-03-20
Red Hat Enterprise Linux 8 (thunderbird) RHSA-2019:1144 2019-05-13
Red Hat Enterprise Linux 8 (firefox) RHSA-2019:0966 2019-05-07

Acknowledgements

Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Samuel Groß (Google Project Zero) as the original reporter.

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation