openssl - security update

Multiple vulnerabilities have been discovered in OpenSSL, a Secure
Sockets Layer toolkit. The Common Vulnerabilities and Exposures project
identifies the following issues:

• CVE-2014-3570
  Pieter Wuille of Blockstream reported that the bignum squaring
  (BN_sqr) may produce incorrect results on some platforms, which
  might make it easier for remote attackers to defeat cryptographic
  protection mechanisms.
• CVE-2014-3571
  Markus Stenberg of Cisco Systems, Inc. reported that a carefully
  crafted DTLS message can cause a segmentation fault in OpenSSL due
  to a NULL pointer dereference. A remote attacker could use this flaw
  to mount a denial of service attack.
• CVE-2014-3572
  Karthikeyan Bhargavan of the PROSECCO team at INRIA reported that an
  OpenSSL client would accept a handshake using an ephemeral ECDH
  ciphersuite if the server key exchange message is omitted. This
  allows remote SSL servers to conduct ECDHE-to-ECDH downgrade attacks
  and trigger a loss of forward secrecy.
• CVE-2014-8275
  Antti Karjalainen and Tuomo Untinen of the Codenomicon CROSS project
  and Konrad Kraszewski of Google reported various certificate
  fingerprint issues, which allow remote attackers to defeat a
  fingerprint-based certificate-blacklist protection mechanism.
• CVE-2015-0204
  Karthikeyan Bhargavan of the PROSECCO team at INRIA reported that
  an OpenSSL client will accept the use of an ephemeral RSA key in a
  non-export RSA key exchange ciphersuite, violating the TLS
  standard. This allows remote SSL servers to downgrade the security
  of the session.

For Debian 6 Squeeze, these issues have been fixed in openssl version 0.9.8o-4squeeze19