CVE-2021-3048: PAN-OS: Invalid URLs in an External Dynamic List (EDL) can Lead to Firewall Outage
Certain invalid URL entries contained in an External Dynamic List (EDL) cause the Device Server daemon (devsrvr) to stop responding. This condition causes subsequent commits on the firewall to fail and prevents administrators from performing commits and configuration changes even though the firewall remains otherwise functional. If the firewall then restarts, it results in a denial-of-service (DoS) condition and the firewall stops processing traffic. This issue impacts: 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. PAN-OS 8.1 and PAN-OS 10.1 versions are not impacted.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
PAN-OSto a version that resolves this vulnerability.Fixed in 9.0.14 - Upgrade
Upgrade
PAN-OSto a version that resolves this vulnerability.Fixed in 9.1.9 - Upgrade
Upgrade
PAN-OSto a version that resolves this vulnerability.Fixed in 10.0.5 - Compensating control
If the firewall encounters this issue, require TAC assistance to make the firewall operational again.
Event History
Frequently Asked Questions
What is the severity of CVE-2021-3048?
The severity of CVE-2021-3048 is medium with a severity value of 5.9.
What is the affected software for CVE-2021-3048?
The affected software for CVE-2021-3048 is Paloaltonetworks Pan-os versions 9.0.0 to 9.0.14, 9.1.0 to 9.1.9, and 10.0.0 to 10.0.5.
How does CVE-2021-3048 impact the firewall?
CVE-2021-3048 causes the Device Server daemon (devsrvr) to stop responding, leading to failed commits and configuration changes on the firewall.
How can I fix CVE-2021-3048?
To fix CVE-2021-3048, update your Paloaltonetworks Pan-os software to a version that is not affected by the vulnerability.
Is there any additional information about CVE-2021-3048?
For more information about CVE-2021-3048, you can refer to the following references: [link1] [link2].