USN-2165-1: OpenSSL vulnerabilities

Ubuntu Security Notice USN-2165-1

7th April, 2014

openssl vulnerabilities

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

  • Ubuntu 13.10
  • Ubuntu 12.10
  • Ubuntu 12.04 LTS

Summary

OpenSSL could be made to expose sensitive information over the network, possibly including private keys.

Software description

  • openssl - Secure Socket Layer (SSL) cryptographic library and tools

Details

Neel Mehta discovered that OpenSSL incorrectly handled memory in the TLS
heartbeat extension. An attacker could use this issue to obtain up to 64k
of memory contents from the client or server, possibly leading to the
disclosure of private keys and other sensitive information. (CVE-2014-0160)

Yuval Yarom and Naomi Benger discovered that OpenSSL incorrectly handled
timing during swap operations in the Montgomery ladder implementation. An
attacker could use this issue to perform side-channel attacks and possibly
recover ECDSA nonces. (CVE-2014-0076)

Update instructions

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

Ubuntu 13.10:
libssl1.0.0 1.0.1e-3ubuntu1.2
Ubuntu 12.10:
libssl1.0.0 1.0.1c-3ubuntu2.7
Ubuntu 12.04 LTS:
libssl1.0.0 1.0.1-4ubuntu5.12

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make all
the necessary changes. Since this issue may have resulted in compromised
private keys, it is recommended to regenerate them.

References

CVE-2014-0076, CVE-2014-0160