openssl - security update

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.

• CVE-2014-3567
  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.
• CVE-2014-3568
  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.

• CVE-2014-3569
  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.

For Debian 6 Squeeze, these issues have been fixed in openssl version 0.9.8o-4squeeze18