CVE-2019-9791

Impact:
Critical
Public Date:
2019-03-20
CWE:
CWE-843
Bugzilla:
1690676: CVE-2019-9791 Mozilla: Type inference is incorrect for constructors entered through on-stack replacement with IonMonkey

The MITRE CVE dictionary describes this issue as:

The type inference system allows the compilation of functions that can cause type confusions between arbitrary objects when compiled through the IonMonkey just-in-time (JIT) compiler and when the constructor function is entered through on-stack replacement (OSR). This allows for possible arbitrary reading and writing of objects during an exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Find out more about CVE-2019-9791 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