USN-3975-1: OpenJDK vulnerabilities

Releases

• Ubuntu 19.04
• Ubuntu 18.10
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• openjdk-8 - Open Source Java implementation
• openjdk-lts - Open Source Java implementation

Details

It was discovered that the BigDecimal implementation in OpenJDK performed
excessive computation when given certain values. An attacker could use this
to cause a denial of service (excessive CPU usage). (CVE-2019-2602)

Corwin de Boor and Robert Xiao discovered that the RMI registry
implementation in OpenJDK did not properly select the correct skeleton
class in some situations. An attacker could use this to possibly escape
Java sandbox restrictions. (CVE-2019-2684)

Mateusz Jurczyk discovered a vulnerability in the 2D component of
OpenJDK. An attacker could use this to possibly escape Java sandbox
restrictions. This issue only affected OpenJDK 8 in Ubuntu 16.04
LTS. (CVE-2019-2697)

Mateusz Jurczyk discovered a vulnerability in the font layout engine
of OpenJDK's 2D component. An attacker could use this to possibly
escape Java sandbox restrictions. This issue only affected OpenJDK 8
in Ubuntu 16.04 LTS. (CVE-2019-2698)

Update instructions

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

Ubuntu 19.04

• openjdk-11-jdk - 11.0.3+7-1ubuntu2~19.04.1
• openjdk-11-jdk-headless - 11.0.3+7-1ubuntu2~19.04.1
• openjdk-11-jre - 11.0.3+7-1ubuntu2~19.04.1
• openjdk-11-jre-headless - 11.0.3+7-1ubuntu2~19.04.1

Ubuntu 18.10

• openjdk-11-jdk - 11.0.3+7-1ubuntu2~18.10.1
• openjdk-11-jdk-headless - 11.0.3+7-1ubuntu2~18.10.1
• openjdk-11-jre - 11.0.3+7-1ubuntu2~18.10.1
• openjdk-11-jre-headless - 11.0.3+7-1ubuntu2~18.10.1

Ubuntu 18.04

• openjdk-11-jdk - 11.0.3+7-1ubuntu2~18.04.1
• openjdk-11-jdk-headless - 11.0.3+7-1ubuntu2~18.04.1
• openjdk-11-jre - 11.0.3+7-1ubuntu2~18.04.1
• openjdk-11-jre-headless - 11.0.3+7-1ubuntu2~18.04.1

Ubuntu 16.04

• openjdk-8-jdk - 8u212-b03-0ubuntu1.16.04.1
• openjdk-8-jdk-headless - 8u212-b03-0ubuntu1.16.04.1
• openjdk-8-jre - 8u212-b03-0ubuntu1.16.04.1
• openjdk-8-jre-headless - 8u212-b03-0ubuntu1.16.04.1
• openjdk-8-jre-jamvm - 8u212-b03-0ubuntu1.16.04.1

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.

References

• CVE-2019-2602
• CVE-2019-2684
• CVE-2019-2698
• CVE-2019-2697