CVE-2020-2031

PAN-OS: Integer underflow in the management interface

Published Jul 8, 2020 CVSS 3.1 · 4.9 Medium EPSS 1.1% KEV · Not listed
Description
An integer underflow vulnerability in the dnsproxyd component of the PAN-OS management interface allows authenticated administrators to issue a command from the command line interface that causes the component to stop responding. 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 9.1 versions earlier than PAN-OS 9.1.3. This issue does not impact PAN-OS 8.1, PAN-OS 9.0, or Prisma Access services.

Remediation

Vendor Solution

This issue is fixed in PAN-OS 9.1.3 and all later PAN-OS versions.


Vendor Workaround

This issue impacts the PAN-OS management interface but you can mitigate the impact of this issue by following best practices for securing the PAN-OS management interface. Please review the Best Practices for Securing Administrative Access in the PAN-OS technical documentation, available at https://docs.paloaltonetworks.com/best-practices.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2020-22057 An integer underflow vulnerability in the dnsproxyd component of the PAN-OS management interface allows authenticated administrators to issue a command from the command line interface that causes the component to stop responding. 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 9.1 versions earlier than PAN-OS 9.1.3. This issue does not impact PAN-OS 8.1, PAN-OS 9.0, or Prisma Access services.
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
palo_alto
Published
Updated
Sep 16, 2024, 5:58 PM
Reserved
Dec 4, 2019, 12:00 AM
Status
Modified
Published
Jul 8, 2020, 5:15 PM
Modified
Jun 17, 2026, 3:11 AM