What is CVE-2021-3047?

CVE-2021-3047 refers to a vulnerability in the Palo Alto Networks PAN-OS web interface where a weak pseudo-random number generator (PRNG) is used during authentication.

What is the severity of CVE-2021-3047?

The severity of CVE-2021-3047 is medium with a severity value of 3.1.

How does CVE-2021-3047 impact Palo Alto Networks PAN-OS?

CVE-2021-3047 allows an authenticated attacker to impersonate other users if they can observe their own authentication secrets over a long duration on the PAN-OS appliance.

Which versions of Palo Alto Networks PAN-OS are affected by CVE-2021-3047?

CVE-2021-3047 affects Palo Alto Networks PAN-OS versions 8.1.0 to 8.1.19, 9.0.0 to 9.0.14, 9.1.0 to 9.1.10, and 10.0.0 to 10.0.4.

How can I fix CVE-2021-3047 in Palo Alto Networks PAN-OS?

To fix CVE-2021-3047, Palo Alto Networks recommends upgrading to a fixed software release.

Vulnerability/
CVE-2021-3047

medium

4.2

CWE

338

11/8/2021

19/8/2021

CVE-2021-3047: Weak RNG

First published: Wed Aug 11 2021(Updated: )

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.

Credit: psirt@paloaltonetworks.com

Affected Software	Affected Version	How to fix
Paloaltonetworks Pan-os	>=8.1.0<8.1.19
Paloaltonetworks Pan-os	>=9.0.0<9.0.14
Paloaltonetworks Pan-os	>=9.1.0<9.1.10
Paloaltonetworks Pan-os	>=10.0.0<10.0.4

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Reference Links

https://security.paloaltonetworks.com/CVE-2021-3047

Frequently Asked Questions

What is CVE-2021-3047?
CVE-2021-3047 refers to a vulnerability in the Palo Alto Networks PAN-OS web interface where a weak pseudo-random number generator (PRNG) is used during authentication.
What is the severity of CVE-2021-3047?
The severity of CVE-2021-3047 is medium with a severity value of 3.1.
How does CVE-2021-3047 impact Palo Alto Networks PAN-OS?
CVE-2021-3047 allows an authenticated attacker to impersonate other users if they can observe their own authentication secrets over a long duration on the PAN-OS appliance.
Which versions of Palo Alto Networks PAN-OS are affected by CVE-2021-3047?
CVE-2021-3047 affects Palo Alto Networks PAN-OS versions 8.1.0 to 8.1.19, 9.0.0 to 9.0.14, 9.1.0 to 9.1.10, and 10.0.0 to 10.0.4.
How can I fix CVE-2021-3047 in Palo Alto Networks PAN-OS?
To fix CVE-2021-3047, Palo Alto Networks recommends upgrading to a fixed software release.

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vendor/paloaltonetworks
canonical/paloaltonetworks pan-os
version/paloaltonetworks pan-os/8.1.0
version/paloaltonetworks pan-os/9.0.0
version/paloaltonetworks pan-os/9.1.0
version/paloaltonetworks pan-os/10.0.0

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