CVE-2021-3047

PAN-OS: Weak Cryptography Used in Web Interface Authentication

Published Aug 11, 2021 CVSS 3.1 · 4.2 Medium EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

This issue is fixed in PAN-OS 8.1.19, PAN-OS 9.0.14, PAN-OS 9.1.10, PAN-OS 10.0.4, and all later PAN-OS versions.


Vendor Workaround

There are no known workarounds for this issue.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-26399 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.
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
palo_alto
Published
Updated
Sep 17, 2024, 2:32 AM
Reserved
Jan 6, 2021, 12:00 AM
Status
Modified
Published
Aug 11, 2021, 5:15 PM
Modified
Jun 17, 2026, 4:04 AM