CVE-2021-3047 PAN-OS: Weak Cryptography Used in Web Interface Authentication

Medium 4.2 Published 11 Aug 2021 Updated 17 Sep 2024

Weak PRNG in PAN-OS web interface allows authenticated attackers to impersonate other administrators' sessions.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-3047?

CVE-2021-3047 is a medium-severity vulnerability in Paloaltonetworks Pan-Os, published on 11 Aug 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A cryptographically weak pseudo-random number generator (PRNG) is used during authentication to the Palo Alto Networks PAN-OS web interface. This enables an authenticated attacker, with the capability to observe their own authentication secrets over a long duration on the PAN-OS appliance, to impersonate another authenticated web interface administrator's session. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.19; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.4. PAN-OS 10.1 versions are not impacted.

Weakness: CWE-338

Which versions are affected by CVE-2021-3047?

It affects 1 product.

Products include Paloaltonetworks Pan-Os.

How do I fix CVE-2021-3047?

No fix has been published for CVE-2021-3047 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-3047 being exploited?

There is no known exploitation of CVE-2021-3047 in the wild and no public exploit code.

All Paloaltonetworks Pan-Os vulnerabilities

Sources

Also known as GHSA-jgpx-vx43-89ff.