Who rated this article


ATTENTION Customers, All Partners and Employees: The Customer Support Portal (CSP) will be undergoing maintenance and unavailable on Saturday, November 7, 2020, from 11 am to 11 pm PST. Please read our blog for more information.

Who rated this article


ROBOT [1] is an attack that affects the TLS RSA key exchange and could lead to decryption of captured sessions if the TLS server originally serving said captured session is still alive, vulnerable and using the same private key.



SSL Decryption and GlobalProtect are susceptible to this issue. Our engineers are working on a software fix. We recommend customers running PAN-OS to upgrade to a fixed version of software or use content update 757, and implement further mitigations through the configuration changes described below under “Mitigations”. PAN-OS impacted releases include 6.1.19 and prior, 7.1.14 and prior, 8.0.6-h3 and prior.


Fix and Mitigations

Software update

PAN-OS 6.1.20 and newer, 7.1.15 and newer,  and 8.0.7 and newer are fixed. Customers exposed to this vulnerability are invited to upgrade to a corrected version of PAN-OS.


Content Update

Palo Alto Networks has released content update 757, which includes a vulnerability signature (“TLS Network Security Protocol Information Disclosure Vulnerability – ROBOT”, #38407) that can be used as an interim mitigation to protect PAN-OS devices until the software is upgraded. For complete protection, signature #38407 must be applied upstream from any interfaces implementing SSL Decryption, or hosting a GlobalProtect portal or a GlobalProtect gateway.


SSL Decryption Mitigation

Customers running PAN-OS 7.1 or later can configure their SSL Decryption profiles to disable RSA.

Screen Shot 2017-12-21 at 9.52.07 AM.png


GlobalProtect Mitigation

If the GlobalProtect server certificate is using RSA, customers running PAN-OS 7.1 or later can opt to replace this certificate with one implementing the Eliptic Curve DSA algorithm as a safer alternative.

Note: A PAN-OS 7.1 known issue prevents properly formatted ECDSA CSR. As a result, the Global Protect ECDSA certificate could either be generated:

  • on appliance by temporarily importing the enterprise Certificate Authority in PAN-OS; or
  • on external enterprise PKI system then imported into PAN-OS along with its private key.

Screen Shot 2017-12-20 at 1.02.01 PM.png


See Also

PAN-OS Technical Documentation


Critical Issues Addressed In PAN-OS Releases


Best Practices For PAN-OS Upgrade



[1] https://robotattack.org/


Tags (1)
Who rated this article