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Ubuntu Security Notice USN-2459-1
January 12, 2015

openssl vulnerabilities
============================================================================

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

- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in OpenSSL.

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

Details:

Pieter Wuille discovered that OpenSSL incorrectly handled Bignum squaring.
(CVE-2014-3570)

Markus Stenberg discovered that OpenSSL incorrectly handled certain crafted
DTLS messages. A remote attacker could use this issue to cause OpenSSL to
crash, resulting in a denial of service. (CVE-2014-3571)

Karthikeyan Bhargavan discovered that OpenSSL incorrectly handled certain
handshakes. A remote attacker could possibly use this issue to downgrade to
ECDH, removing forward secrecy from the ciphersuite. (CVE-2014-3572)

Antti Karjalainen, Tuomo Untinen and Konrad Kraszewski discovered that
OpenSSL incorrectly handled certain certificate fingerprints. A remote
attacker could possibly use this issue to trick certain applications that
rely on the uniqueness of fingerprints. (CVE-2014-8275)

Karthikeyan Bhargavan discovered that OpenSSL incorrectly handled certain
key exchanges. A remote attacker could possibly use this issue to downgrade
the security of the session to EXPORT_RSA. (CVE-2015-0204)

Karthikeyan Bhargavan discovered that OpenSSL incorrectly handled client
authentication. A remote attacker could possibly use this issue to
authenticate without the use of a private key in certain limited scenarios.
This issue only affected Ubuntu 14.04 LTS and Ubuntu 14.10. (CVE-2015-0205)

Chris Mueller discovered that OpenSSL incorrect handled memory when
processing DTLS records. A remote attacker could use this issue to cause
OpenSSL to consume resources, resulting in a denial of service. This issue
only affected Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 14.10.
(CVE-2015-0206)

Update instructions:

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

Ubuntu 14.10:
  libssl1.0.0                     1.0.1f-1ubuntu9.1

Ubuntu 14.04 LTS:
  libssl1.0.0                     1.0.1f-1ubuntu2.8

Ubuntu 12.04 LTS:
  libssl1.0.0                     1.0.1-4ubuntu5.21

Ubuntu 10.04 LTS:
  libssl0.9.8                     0.9.8k-7ubuntu8.23

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

References:
  http://www.ubuntu.com/usn/usn-2459-1
  CVE-2014-3570, CVE-2014-3571, CVE-2014-3572, CVE-2014-8275,
  CVE-2015-0204, CVE-2015-0205, CVE-2015-0206

Package Information:
  https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu9.1
  https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu2.8
  https://launchpad.net/ubuntu/+source/openssl/1.0.1-4ubuntu5.21
  https://launchpad.net/ubuntu/+source/openssl/0.9.8k-7ubuntu8.23