Mozilla · Firefox Esr · CVE-2016-1974
**Name of the Vulnerable Software and Affected Versions**
Mozilla Firefox versions prior to 45.0
Firefox ESR versions prior to 38.7
**Description**
The issue is related to the nsScannerString::AppendUnicodeTo function, which does not verify that memory allocation succeeds. This allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via crafted Unicode data in an HTML, XML, or SVG document.
**Recommendations**
For Mozilla Firefox versions prior to 45.0, update to version 45.0 or later.
For Firefox ESR versions prior to 38.7, update to version 38.7 or later.