Ubuntu Security Notice USN-2706-1
6th August, 2015
openjdk-6 vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 12.04 LTS
Summary
Several security issues were fixed in OpenJDK 6.
Software description
- openjdk-6
– 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 version:
- Ubuntu 12.04 LTS:
-
icedtea-6-jre-cacao
6b36-1.13.8-0ubuntu1~12.04
-
icedtea-6-jre-jamvm
6b36-1.13.8-0ubuntu1~12.04
-
openjdk-6-jdk
6b36-1.13.8-0ubuntu1~12.04
-
openjdk-6-source
6b36-1.13.8-0ubuntu1~12.04
-
openjdk-6-jre
6b36-1.13.8-0ubuntu1~12.04
-
openjdk-6-jre-headless
6b36-1.13.8-0ubuntu1~12.04
-
openjdk-6-jre-zero
6b36-1.13.8-0ubuntu1~12.04
-
openjdk-6-jre-lib
6b36-1.13.8-0ubuntu1~12.04
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.