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Ubuntu 19.04 & 18.04 LTS: USN-4083-1 Critical OpenJDK Denial of Service

ubuntu
Calendar Grey July 31, 2019
Dist Ubuntu Esm H88
Multiple vulnerabilities have been addressed in OpenJDK 11 for Ubuntu versions 18.04 and 19.04, bolstering both security and performance.
Several security issues were fixed in OpenJDK 11.

Summary

Several security issues were fixed in OpenJDK 11.

Software Description:

- openjdk-lts: Open Source Java implementation

Details:

It was discovered that OpenJDK did not sufficiently validate serial streams

before deserializing suppressed exceptions in some situations. An attacker

could use this to specially craft an object that, when deserialized, would

cause a denial of service. (CVE-2019-2762)

It was discovered that in some situations OpenJDK did not properly bound

the amount of memory allocated during object deserialization. An attacker

could use this to specially craft an object that, when deserialized, would

cause a denial of service (excessive memory consumption). (CVE-2019-2769)

It was discovered that OpenJDK did not properly restrict privileges in

certain situations. An attacker could use this to specially construct an

untrusted Java application or applet that could escape sandbox

restrictions. (CVE-2019-2786)

Jonathan Birch discovered that the Networking component of O...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service software update ubuntu memory consumption openjdk networking component

Update Instructions

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

Ubuntu 19.04:
  openjdk-11-jdk                  11.0.4+11-1ubuntu2~19.04
  openjdk-11-jdk-headless         11.0.4+11-1ubuntu2~19.04
  openjdk-11-jre                  11.0.4+11-1ubuntu2~19.04
  openjdk-11-jre-headless         11.0.4+11-1ubuntu2~19.04
  openjdk-11-jre-zero             11.0.4+11-1ubuntu2~19.04

Ubuntu 18.04 LTS:
  openjdk-11-jdk                  11.0.4+11-1ubuntu2~18.04.3
  openjdk-11-jdk-headless         11.0.4+11-1ubuntu2~18.04.3
  openjdk-11-jre                  11.0.4+11-1ubuntu2~18.04.3
  openjdk-11-jre-headless         11.0.4+11-1ubuntu2~18.04.3
  openjdk-11-jre-zero             11.0.4+11-1ubuntu2~18.04.3

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-2019-2762, CVE-2019-2769, CVE-2019-2786, CVE-2019-2816,

CVE-2019-2818, CVE-2019-2821, CVE-2019-7317

Severity
critical
Lowest
Low
Medium
High
Critical

July 31, 2019

Topics%20covered

Topics Covered

security advisory denial of service software update ubuntu memory consumption openjdk networking component

Package Information

https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.4+11-1ubuntu2~19.04
https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.4+11-1ubuntu2~18.04.3

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