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Security Response

Showing posts tagged with Security Response remove filter
Showing posts by Jim Hoagland remove filter
Jim Hoagland | 23 Jul 2007 | 0 comments

I recently made a discovery that shows theimportance of anchoring the input when trying to match a password. Bythis I mean that there should be no extra characters accepted eitherbefore or after the password (i.e., no extra characters that could bepart of the password). Unanchored matching greatly weakens the defenseagainst brute forcing the password.

My wife and I were driving back from dinner when we decided to trythe remote message check feature of our new home phone answeringmachine. I had set the two digit password (let's pretend it is "54")but we hadn't read the directions on how to check messages remotely. Itold my wife our code and she tried just entering the two digits "5-4"and it worked. I had expected that we'd at least have to enter "#"first. That the machine was just listening to the incoming call for thepasscode made me wonder. Playing a hunch, I had my wife call back andenter "1-5-4-0", a four digit passcode with our actual passcode in...

Jim Hoagland | 09 Jul 2007 | 0 comments

Symantec Security Advisory SYMSA-2007-005[1]is now available. This covers a Teredo-related vulnerability in theVista version of Windows Firewall (BID 24779, CVE-2007-3038). (To beclear, this vulnerability is not connected to any of the nine Vistaissues I discussed in my last blog[2].)

Last fall, when Ollie Whitehouse[3] was analyzing whatTCP ports were open over a Teredo interface in a freshly installedWindows Vista RC2, he discovered that port 5357 was open over Teredo.We thought this odd since there is no functional reason this port,which corresponds to Web Services on Devices (WSD)[4], should beremotely accessible. When the release version of Vista becameavailable, we verified that this port was still open. (...

Jim Hoagland | 09 Jul 2007 | 0 comments

Symantec Security Advisory SYMSA-2007-005[1]is now available. This covers a Teredo-related vulnerability in theVista version of Windows Firewall (BID 24779, CVE-2007-3038). (To beclear, this vulnerability is not connected to any of the nine Vistaissues I discussed in my last blog[2].)

Last fall, when Ollie Whitehouse[3] was analyzing whatTCP ports were open over a Teredo interface in a freshly installedWindows Vista RC2, he discovered that port 5357 was open over Teredo.We thought this odd since there is no functional reason this port,which corresponds to Web Services on Devices (WSD)[4], should beremotely accessible. When the release version of Vista becameavailable, we verified that this port was still open. (...

Jim Hoagland | 02 Apr 2007 | 0 comments

Last week the CVE project issued nine new CVEs for Vista, numberedCVE-2007-1527 through CVE-2007-1535. While these CVEs were directlybased on our findings in Windows Vista Network Attack Surface Analysis[1] report (released as a Symantec Security Response whitepaper on March 7th), they had been requested by a third party. I'll describe each of these in this post.

We don't feel that most of the issues are especially significant.Microsoft reviewed the paper prior to its public release and Symantecwould participate in any warranted responsible disclosure forvulnerabilities.

We regard CVE-2007-1535 asimportant, and it could be regarded...

Jim Hoagland | 02 Apr 2007 | 0 comments

Last week the CVE project issued nine newCVEs for Vista, numbered CVE-2007-1527 through CVE-2007-1535. Whilethese CVEs were directly based on our findings in Windows Vista Network Attack Surface Analysis[1] report (released as a Symantec Security Response whitepaper on March 7th), they had been requested by a third party. I'll describe each of these in this post.

We don't feel that most of the issues are especially significant.Microsoft reviewed the paper prior to its public release and Symantecwould participate in any warranted responsible disclosure forvulnerabilities.

We regard CVE-2007-1535 asimportant, and...

Jim Hoagland | 07 Mar 2007 | 0 comments

Greetings. For the last four months we have been busy taking a lookat the release (RTM) version of Windows Vista in an effort to updateour Windows Vista Network Attack Surface Analysis report fromlast July, which covered beta builds of Vista. To broaden and deepenour research, we have retested the results in the first report andexpanded our investigation of certain topics.

As of today, the new reportis available to you. The paper is 118 pages long, but don't worry, youdon't have to read it all! You can skip to the parts you are mostinterested in, or take a look at the 13 pages that summarize theresults in the paper. In addition, the appendices provide details ofour methodology and results. We hope you find this report useful as aWindows Vista network reference, and we hope you find value in both thedetailed security analysis and in the broad overview.

...
Jim Hoagland | 28 Nov 2006 | 0 comments

Greetings and welcome to my first blog posting. Back when Tim Newsham and I wrote Windows Vista Network Attack Surface Analysis: A Broad Overview, we expressed concern about Teredo's security implications, although we hadn't yet had the opportunity to investigate it. Subsequently, I had a chance to dig into the protocol and found that our concerns were justified: Teredo can have an important and negative impact on your host and network security. With that said, let me announce our new research paper: The Teredo Protocol: Tunneling Past Network Security and Other Security Implications.

Teredo is a timely protocol to look into since it is included in Windows Vista and is enabled by default. So, Vista hosts will be using it unless it is explicitly disabled or blocked (...