5.8 - USN-2079-1

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

- Ubuntu 13.10 - Ubuntu 13.04 - Ubuntu 12.10 - Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in OpenSSL.

Software Description: - openssl: Secure Socket Layer (SSL) cryptographic library and tools

Details:

Anton Johansson discovered that OpenSSL incorrectly handled certain invalid TLS handshakes. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2013-4353)

Ron Barber discovered that OpenSSL used an incorrect data structure to obtain a version number. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2013-6449)

Dmitry Sobinov discovered that OpenSSL incorrectly handled certain DTLS retransmissions. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service. (CVE-2013-6450)

This update also disables the default use of the RdRand feature of certain Intel CPUs as the sole source of entropy.

Update instructions:

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

Ubuntu 13.10:
libssl1.0.0 1.0.1e-3ubuntu1.1

Ubuntu 13.04:
libssl1.0.0 1.0.1c-4ubuntu8.2

Ubuntu 12.10:
libssl1.0.0 1.0.1c-3ubuntu2.6

Ubuntu 12.04 LTS:
libssl1.0.0 1.0.1-4ubuntu5.11

After a standard system update you need to reboot your computer to make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-2079-1
CVE-2013-4353, CVE-2013-6449, CVE-2013-6450

Package Information:
https://launchpad.net/ubuntu/+source/openssl/1.0.1e-3ubuntu1.1
https://launchpad.net/ubuntu/+source/openssl/1.0.1c-4ubuntu8.2
https://launchpad.net/ubuntu/+source/openssl/1.0.1c-3ubuntu2.6
https://launchpad.net/ubuntu/+source/openssl/1.0.1-4ubuntu5.11