[SECURITY] [DLA 132-1] openssl security update

[Kurt Roeckx <kurt@roeckx.be>]

Package        : openssl
Version        : 0.9.8o-4squeeze19
CVE ID         : CVE-2014-3570 CVE-2014-3571 CVE-2014-3572 CVE-2014-8275 
                 CVE-2015-0204

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.

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