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Ubuntu Security Notice USN-2696-1

Ubuntu Security Notice USN-2696-1
Posted Aug 3, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2696-1 - 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. Several vulnerabilities were discovered in the cryptographic components of the OpenJDK JRE. An attacker could exploit these to expose sensitive data over the network. Various other issues were also addressed.

tags | advisory, denial of service, vulnerability, info disclosure
systems | linux, ubuntu
advisories | CVE-2015-2590, CVE-2015-2601, CVE-2015-2613, CVE-2015-2621, CVE-2015-2625, CVE-2015-2628, CVE-2015-2632, CVE-2015-2808, CVE-2015-4000, CVE-2015-4731, CVE-2015-4732, CVE-2015-4733, CVE-2015-4748, CVE-2015-4749, CVE-2015-4760
SHA-256 | 8ac70ef5d3ffc3c065a0c52d7f424e904636f1c7c4b12a1196a9cf9750c40c26

Ubuntu Security Notice USN-2696-1

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Content-Disposition: inline

==========================================================================Ubuntu Security Notice USN-2696-1
July 30, 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

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:
http://www.ubuntu.com/usn/usn-2696-1
CVE-2015-2590, CVE-2015-2601, CVE-2015-2613, CVE-2015-2621,
CVE-2015-2625, CVE-2015-2628, CVE-2015-2632, CVE-2015-2808,
CVE-2015-4000, CVE-2015-4000, CVE-2015-4731, CVE-2015-4732,
CVE-2015-4733, CVE-2015-4748, CVE-2015-4749, CVE-2015-4760,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/LogJam

Package Information:
https://launchpad.net/ubuntu/+source/openjdk-7/7u79-2.5.6-0ubuntu1.15.04.1
https://launchpad.net/ubuntu/+source/openjdk-7/7u79-2.5.6-0ubuntu1.14.04.1
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