Vulnerability wrong action Palo

BigPalo — Tue, 14 Dec 2021 12:19:32 GMT

Hi,

We are having a weird issue in Palo. We have a FTP server and we can not access because Palo detects this vulnerability:

Name: SSH User Authentication Brute Force Attempt

Unique Threat ID: 40015

The Palo action is "alert" for this vulnerability but its being blocked "block-ip". I attach the screenshots:

why Palo is detecting a normal access as a vulnerability?

why Palo is not permitting this traffic if the action is alert?

any idea?

thanks

Re: Vulnerability wrong action Palo

SutareMayur — Tue, 14 Dec 2021 14:07:29 GMT

Hi @BigPalo , below are my opinions on your questions -

why Palo is detecting a normal access as a vulnerability?

A- Palo Alto triggers this signature when there are multiple requests in specified time from same source to same destination. e.g. 20 attempts in 1 min then it will consider it as brute force. In this case the signature is triggered and actions set against it will be followed.

why Palo is not permitting this traffic if the action is alert?

A- I would ask you to verify the profile where you are looking the action against the profile mapped on the security policy. It may be the case that you are looking at wrong profile.

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Vulnerability wrong action Palo

Re: Vulnerability wrong action Palo