==========================================================================
Ubuntu Security Notice USN-4607-2
November 12, 2020

openjdk-8, openjdk-lts regressions
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

USN-4607-1 introduced a regression in OpenJDK.

Software Description:
- openjdk-8: Open Source Java implementation
- openjdk-lts: Open Source Java implementation

Details:

USN-4607-1 fixed vulnerabilities and added features in OpenJDK.
Unfortunately, that update introduced a regression that could cause TLS
connections with client certificate authentication to fail in some
situations. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

 It was discovered that OpenJDK incorrectly handled deserializing Proxy
 class objects with many interfaces. A remote attacker could possibly use
 this issue to cause a denial of service (memory consumption) via a
 specially crafted input. (CVE-2020-14779)
 
 Sergey Ostanin discovered that OpenJDK incorrectly restricted
 authentication mechanisms. A remote attacker could possibly use this
 issue to obtain sensitive information over an unencrypted connection.
 (CVE-2020-14781)
 
 It was discovered that OpenJDK incorrectly handled untrusted certificates.
 An attacker could possibly use this issue to read or write sensitive
 information. (CVE-2020-14782)
 
 Zhiqiang Zang discovered that OpenJDK incorrectly checked for integer
 overflows. An attacker could possibly use this issue to bypass certain
 Java sandbox restrictions. (CVE-2020-14792)
 
 Markus Loewe discovered that OpenJDK incorrectly checked permissions when
 converting a file system path to an URI. An attacker could possibly use
 this issue to bypass certain Java sandbox restrictions. (CVE-2020-14796)
 
 Markus Loewe discovered that OpenJDK incorrectly checked for invalid
 characters when converting an URI to a path. An attacker could possibly
 use this issue to read or write sensitive information. (CVE-2020-14797)
 
 Markus Loewe discovered that OpenJDK incorrectly checked the length of
 input strings. An attacker could possibly use this issue to bypass certain
 Java sandbox restrictions. (CVE-2020-14798)
 
 It was discovered that OpenJDK incorrectly handled boundary checks. An
 attacker could possibly use this issue to bypass certain Java sandbox
 restrictions. (CVE-2020-14803)

Update instructions:

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

Ubuntu 20.10:
  openjdk-11-jdk                  11.0.9.1+1-0ubuntu1~20.10
  openjdk-11-jre                  11.0.9.1+1-0ubuntu1~20.10
  openjdk-11-jre-headless         11.0.9.1+1-0ubuntu1~20.10
  openjdk-11-jre-zero             11.0.9.1+1-0ubuntu1~20.10
  openjdk-8-jdk                   8u275-b01-0ubuntu1~20.10
  openjdk-8-jre                   8u275-b01-0ubuntu1~20.10
  openjdk-8-jre-headless          8u275-b01-0ubuntu1~20.10
  openjdk-8-jre-zero              8u275-b01-0ubuntu1~20.10

Ubuntu 20.04 LTS:
  openjdk-11-jdk                  11.0.9.1+1-0ubuntu1~20.04
  openjdk-11-jre                  11.0.9.1+1-0ubuntu1~20.04
  openjdk-11-jre-headless         11.0.9.1+1-0ubuntu1~20.04
  openjdk-11-jre-zero             11.0.9.1+1-0ubuntu1~20.04
  openjdk-8-jdk                   8u275-b01-0ubuntu1~20.04
  openjdk-8-jre                   8u275-b01-0ubuntu1~20.04
  openjdk-8-jre-headless          8u275-b01-0ubuntu1~20.04
  openjdk-8-jre-zero              8u275-b01-0ubuntu1~20.04

Ubuntu 18.04 LTS:
  openjdk-11-jdk                  11.0.9.1+1-0ubuntu1~18.04
  openjdk-11-jre                  11.0.9.1+1-0ubuntu1~18.04
  openjdk-11-jre-headless         11.0.9.1+1-0ubuntu1~18.04
  openjdk-11-jre-zero             11.0.9.1+1-0ubuntu1~18.04
  openjdk-8-jdk                   8u275-b01-0ubuntu1~18.04
  openjdk-8-jre                   8u275-b01-0ubuntu1~18.04
  openjdk-8-jre-headless          8u275-b01-0ubuntu1~18.04
  openjdk-8-jre-zero              8u275-b01-0ubuntu1~18.04

Ubuntu 16.04 LTS:
  openjdk-8-jdk                   8u275-b01-0ubuntu1~16.04
  openjdk-8-jre                   8u275-b01-0ubuntu1~16.04
  openjdk-8-jre-headless          8u275-b01-0ubuntu1~16.04
  openjdk-8-jre-zero              8u275-b01-0ubuntu1~16.04

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.

References:
  https://usn.ubuntu.com/4607-2
  https://usn.ubuntu.com/4607-1
  CVE-2020-14779, CVE-2020-14781, CVE-2020-14782, CVE-2020-14792,
  CVE-2020-14796, CVE-2020-14797, CVE-2020-14798, CVE-2020-14803

Package Information:
  https://launchpad.net/ubuntu/+source/openjdk-8/8u275-b01-0ubuntu1~20.10
  https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.9.1+1-0ubuntu1~20.10
  https://launchpad.net/ubuntu/+source/openjdk-8/8u275-b01-0ubuntu1~20.04
  https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.9.1+1-0ubuntu1~20.04
  https://launchpad.net/ubuntu/+source/openjdk-8/8u275-b01-0ubuntu1~18.04
  https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.9.1+1-0ubuntu1~18.04
  https://launchpad.net/ubuntu/+source/openjdk-8/8u275-b01-0ubuntu1~16.04