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Ubuntu Security Notice USN-3475-1
November 06, 2017

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

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

- Ubuntu 17.10
- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in OpenSSL.

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

Details:

It was discovered that OpenSSL incorrectly parsed the IPAddressFamily
extension in X.509 certificates, resulting in an erroneous display of the
certificate in text format. (CVE-2017-3735)

It was discovered that OpenSSL incorrectly performed the x86_64 Montgomery
squaring procedure. While unlikely, a remote attacker could possibly use
this issue to recover private keys. This issue only applied to Ubuntu 16.04
LTS, Ubuntu 16.10 and Ubuntu 17.04. (CVE-2017-3736)

Update instructions:

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

Ubuntu 17.10:
  libssl1.0.0                     1.0.2g-1ubuntu13.2

Ubuntu 17.04:
  libssl1.0.0                     1.0.2g-1ubuntu11.3

Ubuntu 16.04 LTS:
  libssl1.0.0                     1.0.2g-1ubuntu4.9

Ubuntu 14.04 LTS:
  libssl1.0.0                     1.0.1f-1ubuntu2.23

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

References:
  https://www.ubuntu.com/usn/usn-3475-1
  CVE-2017-3735, CVE-2017-3736

Package Information:
  https://launchpad.net/ubuntu/+source/openssl/1.0.2g-1ubuntu13.2
  https://launchpad.net/ubuntu/+source/openssl/1.0.2g-1ubuntu11.3
  https://launchpad.net/ubuntu/+source/openssl/1.0.2g-1ubuntu4.9
  https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu2.23