Lemmings jumping off cliffs ch how to#
Lemmings jumping off cliffs ch update#

In this case, they and the other firewall competitors, ignored responsible disclosure and publicized a corner-case evasion. Check Point clearly believes in responsible disclosure, as evidenced on their support site and external sites - but apparently only when it suits them. Check Point: A Responsible Disclosure Double Standard? Most of us in the security industry follow what is described as responsible disclosure which are a set of guidelines that allow a vendor who has a possible vulnerability (in this case, us) to investigate and respond to the discovery by an outside party (in this case Check Point).

Lemmings jumping off cliffs ch how to#

For more information on the App-ID cache pollution risk, and how to mitigate it, please contact your local Palo Alto Networks SE or partner. Taking these simple steps will have little or no effect on existing Palo Alto Networks deployments and will eliminate the App-ID cache pollution risks. Longer term, we will make some enhancements to PAN-OS to eliminate the App-ID cache pollution risks. App-ID caching is enabled by default but using a simple CLI command, it can be disabled thereby eliminating all of the cache pollution evasion risks.

This simple step will eliminate nearly all evasion cases that have been observed. Security policy best practices for allowed applications should use “app-default” as the service – not “any”.

Do not use “any” as the service for allowed applications.Mitigating the App-ID cache pollution risk: This firewall evasion technique is a corner case that requires some knowledge of the existing security policy and the evasion risk can be minimized or eliminated through minor policy and configuration modifications. Once the App-ID cache is polluted with the fake application, a “bad” application can be sent to the same destination IP address and port number, thereby evading the Palo Alto Networks firewall. App-ID cache pollution involves purposely polluting the App-ID cache by establishing many connections with a “fake” application that has been allowed by the security policy. The firewall evasion technique, which we call App-ID cache pollution, does exist and here is what users need to know about it and how they can mitigate it.Īpp-ID cache pollution: what is it? App-ID cache is a feature that facilitates certain features within PAN-OS and provides some minor performance benefits. Like lemmings jumping off the cliff, the other old-school firewall vendors have followed suit, publicizing the Check Point information widely. On December 24 th, just in time for Christmas, the folks at Check Point chose to ignore responsible disclosure and publicize a corner-case firewall evasion technique against Palo Alto Networks. For applications that you explicitly want to block, expand the policy to any port, to maximize the identification footprint.įor any further updates, please work with your local Palo Alto Networks sales team and channel partner.For applications that you are enabling, you should assign a specific port (default or custom).We still recommend that you use the following security policy best-practices: PAN-OS 4.1.11 and subsequent releases posted to support site on or after February 6, 2013.PAN-OS 5.0.2 and subsequent releases posted to support site on or after January 15, 2013.As promised back in January, the App-ID cache function in PAN-OS is no longer used for security policy. First off, we should have managed this issue more effectively – we learned from the experience and we will be customer-focused in our comments moving forward.

Lemmings jumping off cliffs ch update#

MaUpdate: I wanted give you all an update to the App-ID cache pollution issue that was discovered earlier this year.