Urgent SSL / TLS vulnerabilities

Q1:
How do I verify if our Windows 2000/2003/2008/2008 R2 are
affected by the 2 vulnerabilities listed below?  The 2 vulnerabilities
notes below just say "Contact the related vendor" which I guess in
our case is Microsoft but we don't have MS support party to contact.


Q2:
Where to obtain the required patches/fixes for the 2 vulnerabilities below
(if we're running MS Win2000/2003/2008/2008R2 & IIS with https) ?
Pls provide exact URL.

Q3:
What's the impact on our existing SSL if we apply the recommended patches?

Q4:
How do I verify that our servers are using TLSv1 / SSLv3 ?

Q5:
What does CVSS & CVE stands for?  What does the CVSS score tells us?

Item 1
The remote service encrypts traffic using TLS / SSL and permits clients to renegotiate connections. The computational requirements for renegotiating a connection are
asymmetrical between the client and the server, with the server performing several
times more work. Since the remote host does not appear to limit the number of
renegotiations for a single TLS / SSL connection, this permits a client to open several
simultaneous connections and repeatedly renegotiate them, possibly leading to a
denial of service condition.

See Also
http://www.ietf.org/mail-archive/web/tls/current/msg07553.html

Solution
Contact the vendor for specific patch information.

Risk Factor
Medium

CVSS Base Score

4.3 (CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P)
CVSS Temporal Score

3.9 (CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P)

References
---------------
BID 48626
CVE CVE-2011-1473

XREF OSVDB:73894 Plugin Information:

Publication date: 2011/05/04, Modification date: 2012/11/15

  The remote host is vulnerable to renegotiation DoS over TLSv1 / SSLv3.

Ports
 tcp/80  ,  443/tcp
 
53491 - SSL / TLS Renegotiation DoS

=================================================================

Item 2
42880 - SSL / TLS Renegotiation Handshakes MiTM Plaintext Data Injection
 
Synopsis

24
The remote service allows insecure renegotiation of TLS / SSL connections.

Description
The remote service encrypts traffic using TLS / SSL but allows a client to insecurely renegotiate the connection after the initial handshake. An unauthenticated, remote attacker may be able to leverage this issue to inject an arbitrary amount of plaintext into the beginning of the application protocol stream, which could facilitate man-in-the-middle attacks if the service assumes that the sessions before and after renegotiation are from the same 'client' and merges them at the application layer.

See Also

http://www.ietf.org/mail-archive/web/tls/current/msg03948.html
http://www.g-sec.lu/practicaltls.pdf
http://tools.ietf.org/html/rfc5746

Solution
Contact the vendor for specific patch information.

Risk Factor
Low

CVSS Base Score

2.6 (CVSS2#AV:N/AC:H/Au:N/C:N/I:P/A:N)

CVSS Temporal Score

2.1 (CVSS2#AV:N/AC:H/Au:N/C:N/I:P/A:N)

References

BID 36935
CVE CVE-2009-3555 XREF OSVDB:59968 XREF OSVDB:59969 XREF OSVDB:59970 XREF OSVDB:59971 XREF OSVDB:59972 XREF OSVDB:59973 XREF OSVDB: