CVE-2020-9893

Se abordó un problema de uso de la memoria previamente liberada con una administración de la memoria mejorada. Este problema es corregido en iOS versión 13.6 y iPadOS versión 13.6, tvOS versión 13.4.8, watchOS versión 6.2.8, Safari versión 13.1.2, iTunes versión 12.10.8 para Windows, iCloud para Windows versión 11.3, iCloud para Windows versión 7.20. Un atacante remoto puede causar la terminación inesperada de la aplicación o una ejecución de código arbitraria

A use-after-free issue was found in webkitgtk that affected WebKitGTK versions before 2.28.4 and WPE WebKit versions before 2.28.4. This flaw allows a remote attacker to cause unexpected application termination or arbitrary code execution. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Apple Safari. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the RenderWidget class. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process.