Public Date:
1728439: CVE-2019-9811 Mozilla: Sandbox escape via installation of malicious language pack

The MITRE CVE dictionary describes this issue as:

As part of a winning Pwn2Own entry, a researcher demonstrated a sandbox escape by installing a malicious language pack and then opening a browser feature that used the compromised translation. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.

Find out more about CVE-2019-9811 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-2019:1777 2019-07-15
Red Hat Enterprise Linux 6 (firefox) RHSA-2019:1765 2019-07-11
Red Hat Enterprise Linux 7 (thunderbird) RHSA-2019:1775 2019-07-15
Red Hat Enterprise Linux 7 (firefox) RHSA-2019:1763 2019-07-11
Red Hat Enterprise Linux 8 (thunderbird) RHSA-2019:1799 2019-07-16
Red Hat Enterprise Linux 8 (firefox) RHSA-2019:1764 2019-07-11

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 5 firefox Out of support scope
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.


Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Niklas Baumstark as the original reporter.

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation