CVE-2020-2031

MediumCVSS 4.9/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 4.9/10CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-191

Affected software

Vendor	Product	Versions
Palo Alto Networks	PAN-OS	>= 9.1, < 9.1.3

References

https://security.paloaltonetworks.com/CVE-2020-2031Vendor Advisory
https://security.paloaltonetworks.com/CVE-2020-2031Vendor Advisory

Timeline

Published: Jul 8, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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