CVE-2019-9793

Impact:
Important
Public Date:
2019-03-20
CWE:
CWE-119
Bugzilla:
1690678: CVE-2019-9793 Mozilla: Improper bounds checks when Spectre mitigations are disabled

The MITRE CVE dictionary describes this issue as:

A mechanism was discovered that removes some bounds checking for string, array, or typed array accesses if Spectre mitigations have been disabled. This vulnerability could allow an attacker to create an arbitrary value in compiled JavaScript, for which the range analysis will infer a fully controlled, incorrect range in circumstances where users have explicitly disabled Spectre mitigations. *Note: Spectre mitigations are currently enabled for all users by default settings.*. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Find out more about CVE-2019-9793 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v3 metrics

CVSS3 Base Score 7.5
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
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 Bruno Keith & Niklas Baumstark (the phoenhex team) as the original reporter.

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation