Ubuntu 13.10 LTS: USN-2079-1 Moderate: OpenSSL Denial Of Service

ubuntu

January 9, 2014

Several security issues were fixed in OpenSSL.

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.

Topics Covered

security advisory denial of service security issue software update Ubuntu OpenSSL security patch

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.