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[SECURITY] [DLA 81-1] openssl security update

Package        : openssl
Version        : 0.9.8o-4squeeze18
CVE ID         : CVE-2014-3567 CVE-2014-3568 CVE-2014-3569

Several vulnerabilities have been found in OpenSSL.

CVE-2014-3566 ("POODLE")

    A flaw was found in the way SSL 3.0 handled padding bytes when
    decrypting messages encrypted using block ciphers in cipher block
    chaining (CBC) mode. This flaw allows a man-in-the-middle (MITM)
    attacker to decrypt a selected byte of a cipher text in as few as 256
    tries if they are able to force a victim application to repeatedly
    send the same data over newly created SSL 3.0 connections.  

    This update adds support for Fallback SCSV to mitigate this issue.
    This does not fix the issue.  The proper way to fix this is to
    disable SSL 3.0.


    A memory leak flaw was found in the way an OpenSSL handled failed
    session ticket integrity checks. A remote attacker could exhaust all
    available memory of an SSL/TLS or DTLS server by sending a large number
    of invalid session tickets to that server.


    When OpenSSL is configured with "no-ssl3" as a build option, servers
    could accept and complete a SSL 3.0 handshake, and clients could be
    configured to send them.

    Note that the package is Debian is not build with this option.


    When openssl is build with the no-ssl3 option and a SSL v3 Client
    Hello is received the ssl method would be set to NULL which could
    later result in a NULL pointer dereference.

    Note that the package is Debian is not build with this option.

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