USN-2696-1: OpenJDK 7 vulnerabilities

30 July 2015

openjdk-7 vulnerabilities

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

  • Ubuntu 15.04
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in OpenJDK 7.

Software Description

  • openjdk-7 - Open Source Java implementation

Details

Several vulnerabilities were discovered in the OpenJDK JRE related to information disclosure, data integrity, and availability. An attacker could exploit these to cause a denial of service or expose sensitive data over the network. (CVE-2015-2590, CVE-2015-2628, CVE-2015-4731, CVE-2015-4732, CVE-2015-4733, CVE-2015-4760, CVE-2015-4748)

Several vulnerabilities were discovered in the cryptographic components of the OpenJDK JRE. An attacker could exploit these to expose sensitive data over the network. (CVE-2015-2601, CVE-2015-2808, CVE-2015-4000, CVE-2015-2625, CVE-2015-2613)

As a security improvement, this update modifies OpenJDK behavior to disable RC4 TLS/SSL cipher suites by default.

As a security improvement, this update modifies OpenJDK behavior to reject DH key sizes below 768 bits by default, preventing a possible downgrade attack.

Several vulnerabilities were discovered in the OpenJDK JRE related to information disclosure. An attacker could exploit these to expose sensitive data over the network. (CVE-2015-2621, CVE-2015-2632)

A vulnerability was discovered with how the JNDI component of the OpenJDK JRE handles DNS resolutions. A remote attacker could exploit this to cause a denial of service. (CVE-2015-4749)

Update instructions

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

Ubuntu 15.04
icedtea-7-jre-jamvm - 7u79-2.5.6-0ubuntu1.15.04.1
openjdk-7-jdk - 7u79-2.5.6-0ubuntu1.15.04.1
openjdk-7-jre - 7u79-2.5.6-0ubuntu1.15.04.1
openjdk-7-jre-headless - 7u79-2.5.6-0ubuntu1.15.04.1
openjdk-7-jre-lib - 7u79-2.5.6-0ubuntu1.15.04.1
openjdk-7-jre-zero - 7u79-2.5.6-0ubuntu1.15.04.1
Ubuntu 14.04 LTS
icedtea-7-jre-jamvm - 7u79-2.5.6-0ubuntu1.14.04.1
openjdk-7-jdk - 7u79-2.5.6-0ubuntu1.14.04.1
openjdk-7-jre - 7u79-2.5.6-0ubuntu1.14.04.1
openjdk-7-jre-headless - 7u79-2.5.6-0ubuntu1.14.04.1
openjdk-7-jre-lib - 7u79-2.5.6-0ubuntu1.14.04.1
openjdk-7-jre-zero - 7u79-2.5.6-0ubuntu1.14.04.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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