CVE-2020-14583: 
NixOS vulnerability analysis and mitigation

CVE-2020-14583 is a vulnerability affecting Java SE and Java SE Embedded products from Oracle. The affected versions include Java SE: 7u261, 8u251, 11.0.7, 14.0.1 and Java SE Embedded: 8u251. This vulnerability allows unauthenticated attackers with network access via multiple protocols to compromise Java SE and Java SE Embedded. The vulnerability requires human interaction and while it exists in Java SE/Java SE Embedded, successful attacks may significantly impact additional products (Oracle Critical Patch).

The vulnerability is related to incorrect handling of concurrent access in the java.nio.Buffer class, discovered by Markus Loewe. It has been assigned a CVSS v3.1 Base Score of 8.3 (HIGH) with the vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H. The vulnerability is considered difficult to exploit but could allow attackers to bypass sandbox restrictions (NVD, Red Hat).

Successful exploitation of this vulnerability can result in complete takeover of Java SE and Java SE Embedded systems. The vulnerability applies specifically to Java deployments that load and run untrusted code (e.g., code from the internet) and rely on the Java sandbox for security. It does not affect Java deployments that only load and run trusted code (Oracle Critical Patch).

The vulnerability is classified as difficult to exploit and requires human interaction from a person other than the attacker. It requires network access via multiple protocols, and while the vulnerability exists in Java SE components, successful exploitation could significantly impact additional products (Oracle Critical Patch).

Oracle has released patches for affected versions in their July 2020 Critical Patch Update. Users should upgrade to the following versions: Java SE 7u261, 8u251, 11.0.7, and 14.0.1. For Java SE Embedded, users should upgrade to version 8u251. After applying the updates, any Java applications or applets need to be restarted to implement the necessary changes (Ubuntu Security).