CVE-2020-2830: 
NixOS vulnerability analysis and mitigation

CVE-2020-2830 is a vulnerability in Java SE and Java SE Embedded that affects multiple versions including Java SE: 7u251, 8u241, 11.0.6, and 14. The vulnerability was disclosed in April 2020 as part of Oracle's Critical Patch Update. It involves an incorrect handling of regular expressions in the Scanner component that could result in a denial of service condition (Oracle CPU, Red Hat).

The vulnerability exists in the Concurrency component of Java SE, specifically in the Scanner functionality. It relates to improper handling of regular expressions that could lead to a denial of service condition. The vulnerability has been assigned a CVSS v3.0 base score of 5.3 (MEDIUM) with the vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L (NetApp Security).

Successful exploitation of this vulnerability could allow an unauthenticated attacker to cause a denial of service condition in applications using the affected Scanner component. This could affect the availability of Java-based applications that process regular expressions through the Scanner functionality (Ubuntu Security).

Oracle has released patches for the affected versions in the April 2020 Critical Patch Update. Users should upgrade to Java SE: 7u251, 8u241, 11.0.6, or later versions to address this vulnerability. For systems running OpenJDK, updates are available through various distributions including Ubuntu, Debian, and Red Hat (Oracle CPU, Red Hat).