Ubuntu: 4726-1 Serious OpenJDK DDoS Vulnerability Alert

ubuntu

February 9, 2021

OpenJDK could be made to crash if it received specially crafted input.

Summary

OpenJDK could be made to crash if it received specially crafted

input.

Software Description:

- openjdk-8: Open Source Java implementation

- openjdk-lts: Open Source Java implementation

Details:

It was discovered that OpenJDK incorrectly handled the direct buffering of

characters. An attacker could use this issue to cause OpenJDK to crash,

resulting in a denial of service, or cause other unspecified impact.

Topics Covered

security advisory denial of service critical issue Ubuntu critical severity Denial of Service ubuntu openjdk OpenJDK

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.10:
  openjdk-11-jdk                  11.0.10+9-0ubuntu1~20.10
  openjdk-11-jre                  11.0.10+9-0ubuntu1~20.10
  openjdk-11-jre-headless         11.0.10+9-0ubuntu1~20.10
  openjdk-11-jre-zero             11.0.10+9-0ubuntu1~20.10
  openjdk-8-jdk                   8u282-b08-0ubuntu1~20.10
  openjdk-8-jre                   8u282-b08-0ubuntu1~20.10
  openjdk-8-jre-headless          8u282-b08-0ubuntu1~20.10
  openjdk-8-jre-zero              8u282-b08-0ubuntu1~20.10

Ubuntu 20.04 LTS:
  openjdk-11-jdk                  11.0.10+9-0ubuntu1~20.04
  openjdk-11-jre                  11.0.10+9-0ubuntu1~20.04
  openjdk-11-jre-headless         11.0.10+9-0ubuntu1~20.04
  openjdk-11-jre-zero             11.0.10+9-0ubuntu1~20.04
  openjdk-8-jdk                   8u282-b08-0ubuntu1~20.04
  openjdk-8-jre                   8u282-b08-0ubuntu1~20.04
  openjdk-8-jre-headless          8u282-b08-0ubuntu1~20.04
  openjdk-8-jre-zero              8u282-b08-0ubuntu1~20.04

Ubuntu 18.04 LTS:
  openjdk-11-jdk                  11.0.10+9-0ubuntu1~18.04
  openjdk-11-jre                  11.0.10+9-0ubuntu1~18.04
  openjdk-11-jre-headless         11.0.10+9-0ubuntu1~18.04
  openjdk-11-jre-zero             11.0.10+9-0ubuntu1~18.04
  openjdk-8-jdk                   8u282-b08-0ubuntu1~18.04
  openjdk-8-jre                   8u282-b08-0ubuntu1~18.04
  openjdk-8-jre-headless          8u282-b08-0ubuntu1~18.04
  openjdk-8-jre-zero              8u282-b08-0ubuntu1~18.04

Ubuntu 16.04 LTS:
  openjdk-8-jdk                   8u282-b08-0ubuntu1~16.04
  openjdk-8-jre                   8u282-b08-0ubuntu1~16.04
  openjdk-8-jre-headless          8u282-b08-0ubuntu1~16.04
  openjdk-8-jre-jamvm             8u282-b08-0ubuntu1~16.04
  openjdk-8-jre-zero              8u282-b08-0ubuntu1~16.04

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any Java
applications or applets to make all the necessary changes.