USN-3194-1: OpenJDK 7 vulnerabilities

Ubuntu Security Notice USN-3194-1

8th February, 2017

openjdk-7 vulnerabilities

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

• Ubuntu 14.04 LTS



• Ubuntu 12.04 LTS

Summary

Several security issues were fixed in OpenJDK 7.

Software description

• openjdk-7
  - Open Source Java implementation
  
  

Details

Karthik Bhargavan and Gaetan Leurent discovered that the DES and
Triple DES ciphers were vulnerable to birthday attacks. A remote
attacker could possibly use this flaw to obtain clear text data from
long encrypted sessions. This update moves those algorithms to the
legacy algorithm set and causes them to be used only if no non-legacy
algorithms can be negotiated. ()

It was discovered that OpenJDK did not properly verify object
identifier (OID) length when reading Distinguished Encoding Rules
(DER) records, as used in x.509 certificates and elsewhere. An
attacker could use this to cause a denial of service (memory
consumption). ()

It was discovered that the URLStreamHandler class in OpenJDK did not
properly parse user information from a URL. A remote attacker could
use this to expose sensitive information. ()

It was discovered that the Remote Method Invocation (RMI)
implementation in OpenJDK performed deserialization of untrusted
inputs. A remote attacker could use this to execute arbitrary
code. ()

It was discovered that the PNGImageReader class in OpenJDK did not
properly handle iTXt and zTXt chunks. An attacker could use this to
cause a denial of service (memory consumption). ()

It was discovered that the atomic field updaters in the
java.util.concurrent.atomic package in OpenJDK did not properly
restrict access to protected field members. An attacker could use
this to specially craft a Java application or applet that could bypass
Java sandbox restrictions. ()

Update instructions

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

Ubuntu 14.04 LTS:

Ubuntu 12.04 LTS:

To update your system, please follow these instructions:
,

,

,

,

,

,

CVE-2017-3289