CVE-2021-3053 PAN-OS: Exceptional Condition Denial-of-Service (DoS)

High 7.5 Published 8 Sep 2021 Updated 16 Sep 2024

Unauthenticated attackers can crash PAN-OS dataplane services via crafted traffic, causing device restarts and maintenance mode.

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

What is CVE-2021-3053?

CVE-2021-3053 is a high-severity denial of service vulnerability in Paloaltonetworks Pan-Os, published on 8 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An improper handling of exceptional conditions vulnerability exists in the Palo Alto Networks PAN-OS dataplane that enables an unauthenticated network-based attacker to send specifically crafted traffic through the firewall that causes the service to crash. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.9; PAN-OS 10.0 versions earlier than PAN-OS 10.0.5. This issue does not affect Prisma Access.

Weakness: CWE-755

Which versions are affected by CVE-2021-3053?

It affects 1 product.

Products include Paloaltonetworks Pan-Os.

How do I fix CVE-2021-3053?

No fix has been published for CVE-2021-3053 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-3053 being exploited?

There is no known exploitation of CVE-2021-3053 in the wild and no public exploit code.

All Paloaltonetworks Pan-Os vulnerabilities

Sources

Also known as GHSA-34w2-p277-pp7p.