Quick Palo Alto Networks Global Protect Vulnerablity Update (CVE-2024-3400), (Mon, Apr 15th)

This is a quick update to our initial diary from this weekend (CVE-2024-3400).

At this point, we are not aware of a public exploit for this vulnerability. The widely shared GitHub exploit is almost certainly fake.

As promised, Palo Alto delivered a hotfix for affected versions on Sunday (close to midnight Eastern Time).

One of our readers, Mark, observed attacks attempting to exploit the vulnerability from two IP addresses:

173.255.223.159: An Akamai/Linode IP address. We do not have any reports from this IP address. Shodan suggests that the system may have recently hosted a WordPress site.

146.70.192.174: A system in Singapore that has been actively scanning various ports in March and April.

According to Mark, the countermeasure of disabling telemetry worked. The attacks where directed at various GlobalProtect installs, missing recently deployed instances. This could be due to the attacker using a slightly outdated target list.

Please let us know if you observe any additional attacks or if you come across exploits for this vulnerability.

—
Johannes B. Ullrich, Ph.D. , Dean of Research, SANS.edu
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