USN-2696-1: OpenJDK 7 vulnerabilities

30 July 2015

Several security issues were fixed in OpenJDK 7.

Releases

Packages

  • 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
Ubuntu 14.04

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.

Related notices

  • 2696-1: openjdk-7-jre-zero, openjdk-7, openjdk-7-jre-headless, icedtea-7-jre-jamvm, openjdk-7-jdk, openjdk-7-jre-lib, openjdk-7-jre
  • USN-2656-1: firefox
  • USN-2656-2: firefox
  • USN-2673-1: thunderbird
  • USN-2706-1: openjdk-6-source, openjdk-6-jre, openjdk-6-jdk, openjdk-6-jre-headless, openjdk-6-jre-zero, icedtea-6-jre-cacao, openjdk-6-jre-lib, openjdk-6, icedtea-6-jre-jamvm
  • USN-2740-1: libicu52, icu, libicu48