Tag Archives: NSS Labs

Consumer AVs And Exploit Prevention

Targeted attacks exploiting endpoint vulnerabilities are becoming more and more common and increasingly aggressive.

For this reason I could not help but notice the last report from NSS Labs dealing with the capability of 13 consumer grade AV products, to protect against two critical Microsoft vulnerabilities (CVE-2012-1875 and CVE-2012-1889). The successful exploitation of these critical vulnerabilities could result in arbitrary remote code execution by the attacker leading to very harmful consequences for the victim, such as, for instance, to make it become part of a botnet. Unfortunately a very common scenario in these troubled days.

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If Phishing Goes Mobile…

One of the most surprising things I noticed concerning the Lockheed Martin Affair, was the affirmation contained in the Reuters Article, made  by Rick Moy, president of NSS Labs, indicating that the initial RSA attack was followed by malware and phishing campaigns seeking specific data to link tokens to end-users (an indirect evidence of the same authors behind the infamous RSA breach and the Lockheed Martin attack.

My initial surprise only lasted few seconds, since, this year is showing us a brand new role for the phishing attacks which are more and more targeted to steal corporate sensitive data, and constitute the first level of attack for Advanced Persistent Threats.

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More Random Thoughts on the RSA Breach

The X-35, Joint Strike Fighter from Lockheed M...
Image via Wikipedia

Probably it was a quite easy prediction, however it looks like what I suggested on my random thoughts on the RSA Breach has definitively come true: RSA was not the target, probably its customers were.

On this front, the last two days were quite turbulent, and what seemed initially a simple speculation of an attack using compromised SecureID seeds targeted to “a very large U. S. defense contractor”, is revealing to be one of several attacks towards military contractors of U.S. Defense, using the data stolen during the famous breach of March.

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TCP Split Handshake: Why Cisco ASA is not susceptible

As I told yesterday, I was not very satisfied with the updated NSS remediation guide concerning the TCP Split Handshake issue, published after the second round of testing on Cisco and Fortinet devices.

In particular, in case of Cisco, in my opinion the report was poor on details, considering Cisco’s ACL approach suboptimal and definitively coming to the discouraging conclusion that:

Our original results are unchanged, and ultimately Cisco did offer some mitigation steps.

This is clearly in contrast with what stated in the official Cisco post, which declares Cisco ASA firewall not susceptible to the issue, even if, in my opinion, the most disappointing aspect of the story consists in the fact that no other detail is provided on the NSS document, leaving many unresolved questions about the real nature of the issue and the level of vulnerability of Cisco devices.

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TCP Split Handshake: The (Never)ending Story…

Cisco ASA 5510 Adaptive Security Appliance Cluster
Image by Audric Leperdi via Flickr

Update May 12: TCP Split Handshake: Why Cisco ASA is not susceptible

On May, the 9th 2011, nearly in contemporary, Cisco Systems and Fortinet, the last two security vendors involved in the TCP Split Handshake affair, which had not yet released a fix for the encountered issue, released two separate posts indicating the result of a second session of tests performed with NSS Labs.

As you will probably know, Cisco Systems was not able to reproduce the issue on its labs and decided to perform a second joint session with NSS Labs on April, the 21st 2011 promising a definitive, resolutive post for the same day. I must confess I have been waiting for a while for the promised post, eager to know the outcome and the likely happy ending of the story. I still did not know I would have had to curb my hunger for knowledge for nearly 20 days (much more than initially expected), and (unfortunately) I would also have had to renounce to the happy ending as well (at least for Cisco).

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Other Considerations On TCP Split Handshake

The storm unleashed by NSS Labs test for the TCP split handshake attack which affected 5 firewall vendors  is far from being quiet.

During these days I enjoyed speaking with many colleagues about the results of the tests and definitively, I must confess that firewalls were not the only entities unaware the TCP Split Handshake, as a matter of fact, none of the professionals I discussed with (of course including me the first time I read about it) were familiar with this method of establishing TCP connections.

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TCP Split Handshake Attack Explained

Update May 12: TCP Split Handshake: Why Cisco ASA is not susceptible

Update May 11: The Never Ending Story

Update April 21: Other Considerations on TCP Split Handshake

Few days ago, independent security research and testing NSS Labs, issued a comparative report among six network security technologies. The controversial results created a comprehensible turmoil among the security vendors involved in the tests, and more in general inside the infosec landscape. As a matter of fact it turned out that that five of the six tested platforms were susceptible to TCP Split handshake attack.

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