Mozilla · Firefox Esr · CVE-2019-11694
**Name of the Vulnerable Software and Affected Versions**
Firefox versions prior to 67
Firefox ESR versions prior to 60.7
Thunderbird versions prior to 60.7
**Description**
A vulnerability exists in the Windows sandbox where an uninitialized value in memory can be leaked to a renderer from a broker when making a call to access an otherwise unavailable file. This results in the potential leaking of information stored at that memory location. This issue only occurs on Windows, and other operating systems are unaffected.
**Recommendations**
For Firefox versions prior to 67, update to version 67 or later.
For Firefox ESR versions prior to 60.7, update to version 60.7 or later.
For Thunderbird versions prior to 60.7, update to version 60.7 or later.