[1391] in Security FYI
[IS&T Security-FYI] SFYI Newsletter, December 19, 2008
daemon@ATHENA.MIT.EDU (Monique Yeaton)
Fri Dec 19 15:22:15 2008
Message-Id: <F397832D-50B1-4707-B692-8938BDE715B6@mit.edu>
From: Monique Yeaton <myeaton@MIT.EDU>
To: ist-security-fyi@MIT.EDU
Mime-Version: 1.0 (Apple Message framework v930.3)
Date: Fri, 19 Dec 2008 15:18:15 -0500
Cc: itss@MIT.EDU
Content-Type: multipart/mixed; boundary="===============1190845969=="
Errors-To: ist-security-fyi-bounces@MIT.EDU
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In this issue:
1. Patch Released for IE 7 Flaw
2. Apple Security Updates
3. Q&A About MIT's Wireless Network
----------------------------------------
1. Patch Released for IE 7 Flaw
----------------------------------------
On December 17, Microsoft released a critical security patch outside
of the normal monthly patch cycle. This patch addresses a user based
vulnerability in Internet Explorer, which was found on December 10.
This patch has been approved for deployment on MIT WAUS.
It is recommended that Internet Explorer 7 users who are not
subscribed to MIT WAUS -- especially those running Windows XP --
download the patch or allow the Microsoft automatic update to run.
More details about the patch can be found here:
<http://www.microsoft.com/technet/security/bulletin/ms08-078.mspx>
---------------------------------
2. Apple Security Updates
---------------------------------
Apple released Security Update 2008-008 and Mac OS X version 10.5.6 on
December 15, to correct multiple vulnerabilities.
Software affected:
* Apple Mac OS X versions prior to and including 10.4.11 (Tiger) and
10.5.5 (Leopard)
* Apple Mac OS X Server versions prior to and including 10.4.11
(Tiger) and 10.5.5 (Leopard)
Attackers could exploit these vulnerabilities to execute arbitrary
code, gain access to sensitive information, or cause a denial of
service. It is recommended to install Apple Security Update 2008-008
or Apple Mac OS X version 10.5.6. These and other updates are
available via Software Update or via Apple Downloads.
More details about the patch can be found here:
<https://support.apple.com/kb/HT3338>
------------------------------------------------
3. Q&A About MIT's Wireless Network
------------------------------------------------
Q: I understand that MIT's wireless network is "unsecured;" i.e. it is
not either WEP or WPA protected. What are the security risks
associated with this for me? (I have Firewall, VirusScan, etc. on all
my computers, I use ssh to connect to my athena terminals, etc.)
A: In its current state, the wireless infrastructure here at MIT does
not support any client-to-Access Point encryption or authentication.
The biggest impact this has is that any information your machine
transmits to the access point (to other computers) can potentially be
seen by others, if they are looking, and if the data isn't encrypted
by the application(s) that you are using.
Your data would be vulnerable in this scenario if an attack based on
inception of data over the wireless network were launched. For
instance, Gmail's login process is SSL-based, however, unless
specifically enabled in preferences, the rest of your email session is
sent over the network in a form able to be read by others (what is
also called "in the clear"). If someone were capturing data in
transit while you were checking email, they would be able to read any
emails that you did.
MIT's email client infrastructure (IMAP and Webmail) does *not*
transmit data "in the clear," and standard configurations adopt
encryption. So what is encryption? It is what it sounds like, the
cryptography of messages, turning them into gibberish for anyone
listening for or watching data traffic.
As Hal Abelson wrote back in 1997, "Without encryption, all network
transactions are essentially public. Email has the approximate privacy
of a postcard. Passwords, credit card numbers, and personal
information transmitted in the clear over the network may as well be
published in the newspaper. If the Internet is to be a suitable
vehicle for communications and commerce, then much of the information
that flows on it must be encrypted."
It's in your best interest to use encryption wherever possible (in
each individual application that you use), or set up other measures to
ensure that all of your network traffic is encrypted. The campus
Virtual Private Network, or VPN, is available to do exactly that.
More information on using MIT's VPN is available here:
<http://web.mit.edu/ist/topics/network/remoteaccess.html>
=========================
Monique Yeaton
IT Security Awareness Consultant
MIT Information Services & Technology (IS&T)
(617) 253-2715
http://web.mit.edu/ist/security
---------------------------------------
Important: DO NOT GIVE OUT YOUR PASSWORDS!
Ignore emails asking you to provide yours. IS&T will *NEVER* ask you
for your password.
--Apple-Mail-2-155109326
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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; "><div><br></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; ">In =
this issue:</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; min-height: 17px; "><br></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; ">1. =
Patch Released for IE 7 Flaw</div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 14px/normal Helvetica; ">2. Apple Security =
Updates</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; ">3. Q&A About MIT's Wireless Network</div><p =
style=3D"margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px Helvetica; =
min-height: 17.0px"> <br class=3D"webkit-block-placeholder"></p><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
min-height: 17px; "><br></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 14px/normal Helvetica; =
">----------------------------------------</div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: =
normal normal normal 14px/normal Helvetica; ">1. Patch Released for IE 7 =
Flaw</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; =
">----------------------------------------</div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: =
normal normal normal 14px/normal Helvetica; min-height: 17px; =
"><br></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; ">On December 17, Microsoft released a critical =
security patch outside of the normal monthly patch cycle. This patch =
addresses a user based vulnerability in Internet Explorer, which was =
found on December 10. This patch has been approved for deployment on MIT =
WAUS. </div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; min-height: 17px; "><br></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; ">It =
is recommended that Internet Explorer 7 users who are not subscribed to =
MIT WAUS -- especially those running Windows XP -- download the patch or =
allow the Microsoft automatic update to run.</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
min-height: 17px; "><br></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 14px/normal Helvetica; ">More details about the patch can =
be found here:</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; "><<a =
href=3D"http://www.microsoft.com/technet/security/bulletin/ms08-078.mspx">=
http://www.microsoft.com/technet/security/bulletin/ms08-078.mspx</a>></div=
><div style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
min-height: 17px; "><br></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 14px/normal Helvetica; min-height: 17px; "><br></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
">---------------------------------</div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 14px/normal Helvetica; ">2. Apple Security =
Updates</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; ">---------------------------------</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
min-height: 17px; "><br></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 14px/normal Helvetica; ">Apple released Security Update =
2008-008 and Mac OS X version 10.5.6 on December 15, to correct multiple =
vulnerabilities.</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; min-height: 17px; "><br></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
">Software affected:</div><div style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; min-height: 17px; "><br></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
"> * Apple Mac OS X versions prior to and including 10.4.11 (Tiger) =
and 10.5.5 (Leopard)</div><div style=3D"margin-top: 0px; margin-right: =
0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; "> * Apple Mac OS X Server versions prior to =
and including 10.4.11 (Tiger) and 10.5.5 (Leopard)</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
min-height: 17px; "><br></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 14px/normal Helvetica; ">Attackers could exploit these =
vulnerabilities to execute arbitrary code, gain access to sensitive =
information, or cause a denial of service. It is recommended to install =
Apple Security Update 2008-008 or Apple Mac OS X version 10.5.6. These =
and other updates are available via Software Update or via Apple =
Downloads.</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; min-height: 17px; "><br></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
">More details about the patch can be found here:</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
"><<a =
href=3D"https://support.apple.com/kb/HT3338">https://support.apple.com/kb/=
HT3338</a>></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; min-height: 17px; "><br></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
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normal normal 14px/normal Helvetica; =
">------------------------------------------------</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; ">3. =
Q&A About MIT's Wireless Network</div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 14px/normal Helvetica; =
">------------------------------------------------</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
min-height: 17px; "><br></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 14px/normal Helvetica; ">Q: I understand that MIT's =
wireless network is "unsecured;" i.e. it is not either WEP or WPA =
protected. What are the security risks associated with this for me? (I =
have Firewall, VirusScan, etc. on all my computers, I use ssh to connect =
to my athena terminals, etc.)</div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 14px/normal Helvetica; min-height: 17px; "><br></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; ">A: =
In its current state, the wireless infrastructure here at MIT does not =
support any client-to-Access Point encryption or authentication. The =
biggest impact this has is that any information your machine transmits =
to the access point (to other computers) can potentially be seen by =
others, if they are looking, and if the data isn't encrypted by the =
application(s) that you are using.</div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 14px/normal Helvetica; min-height: 17px; "><br></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
">Your data would be vulnerable in this scenario if an attack based on =
inception of data over the wireless network were launched. For instance, =
Gmail's login process is SSL-based, however, unless specifically enabled =
in preferences, the rest of your email session is sent over the network =
in a form able to be read by others (what is also called "in the =
clear"). If someone were capturing data in transit while you were =
checking email, they would be able to read any emails that you =
did.</div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; min-height: 17px; "><br></div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
">MIT's email client infrastructure (IMAP and Webmail) does *not* =
transmit data "in the clear," and standard configurations adopt =
encryption. So what is encryption? It is what it sounds like, the =
cryptography of messages, turning them into gibberish for anyone =
listening for or watching data traffic.</div><div style=3D"margin-top: =
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: =
normal normal normal 14px/normal Helvetica; min-height: 17px; =
"><br></div><div style=3D"margin-top: 0px; margin-right: 0px; =
margin-bottom: 0px; margin-left: 0px; font: normal normal normal =
14px/normal Helvetica; ">As Hal Abelson wrote back in 1997, "Without =
encryption, all network transactions are essentially public. Email has =
the approximate privacy of a postcard. Passwords, credit card numbers, =
and personal information transmitted in the clear over the network may =
as well be published in the newspaper. If the Internet is to be a =
suitable vehicle for communications and commerce, then much of the =
information that flows on it must be encrypted."</div><div =
style=3D"margin-top: 0px; margin-right: 0px; margin-bottom: 0px; =
margin-left: 0px; font: normal normal normal 14px/normal Helvetica; =
min-height: 17px; "><br></div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 14px/normal Helvetica; ">It's in your best interest to use =
encryption wherever possible (in each individual application that you =
use), or set up other measures to ensure that all of your network =
traffic is encrypted. The campus Virtual Private Network, or VPN, =
is available to do exactly that. More information on using MIT's =
VPN is available here: </div><div style=3D"margin-top: 0px; =
margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal =
normal normal 14px/normal Helvetica; "><<a =
href=3D"http://web.mit.edu/ist/topics/network/remoteaccess.html">http://we=
b.mit.edu/ist/topics/network/remoteaccess.html</a>></div><div =
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auto; -webkit-text-stroke-width: 0px; "><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><span class=3D"Apple-style-span" =
style=3D"border-collapse: separate; color: rgb(0, 0, 0); font-family: =
Helvetica; font-size: 14px; font-style: normal; font-variant: normal; =
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auto; -webkit-text-stroke-width: 0px; "><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
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widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; =
-webkit-border-vertical-spacing: 0px; =
-webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: =
auto; -webkit-text-stroke-width: 0px; "><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><span class=3D"Apple-style-span" =
style=3D"border-collapse: separate; color: rgb(0, 0, 0); font-family: =
Helvetica; font-size: 14px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; =
widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; =
-webkit-border-vertical-spacing: 0px; =
-webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: =
auto; -webkit-text-stroke-width: 0px; "><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><span class=3D"Apple-style-span" =
style=3D"border-collapse: separate; color: rgb(0, 0, 0); font-family: =
Helvetica; font-size: 14px; font-style: normal; font-variant: normal; =
font-weight: normal; letter-spacing: normal; line-height: normal; =
orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; =
widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; =
-webkit-border-vertical-spacing: 0px; =
-webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: =
auto; -webkit-text-stroke-width: 0px; "><div style=3D"word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space; "><div><span class=3D"Apple-style-span" =
style=3D"font-size: 12px; "><div style=3D"font-size: 12px; "><br =
class=3D"khtml-block-placeholder"></div><div style=3D"font-size: 12px; =
">=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D</div><div style=3D"font-size: 12px; ">Monique Yeaton</div><div =
style=3D"font-size: 12px; ">IT Security Awareness Consultant</div><div =
style=3D"font-size: 12px; ">MIT Information Services & Technology =
(IS&T)</div><div style=3D"font-size: 12px; ">(617) =
253-2715</div><div style=3D"font-size: 12px; "><a =
href=3D"http://web.mit.edu/ist/security">http://web.mit.edu/ist/security</=
a></div></span></div><div><br></div><div><span class=3D"Apple-style-span" =
style=3D"color: rgb(192, 0, 0); font-family: Arial; font-size: 12px; =
font-weight: bold; =
">---------------------------------------</span></div><div><font =
class=3D"Apple-style-span" color=3D"#C00000" face=3D"Arial" =
size=3D"3"><span class=3D"Apple-style-span" style=3D"font-size: 12px; =
"><b><span class=3D"Apple-style-span" style=3D"color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: 14px; font-weight: normal; =
"><div><font class=3D"Apple-style-span" color=3D"#C00000" face=3D"Arial" =
size=3D"3"><span class=3D"Apple-style-span" style=3D"font-size: 12px; =
"><b>Important: DO NOT GIVE OUT YOUR =
PASSWORDS! </b></span></font></div><div><font =
class=3D"Apple-style-span" color=3D"#C00000" face=3D"Arial" =
size=3D"3"><span class=3D"Apple-style-span" style=3D"font-size: 12px; =
"><b>Ignore emails asking you to provide yours. IS&T will *NEVER* =
ask you for your =
password. </b></span></font></div></span></b></span></font></div></di=
v></span></div></span></div></span></div></span></div></span></div></span>=
</div></span></div></span></div></span> </div><br></body></html>=
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