CVE-2020-2031

PAN-OS: Integer underflow in the management interface

MEDIUM
4.9
CVSS Score
Published: July 8, 2020 at 04:35 PM UTC
Updated: June 17, 2026 at 03:11 AM UTC
1 product affected across 1 vendorPAN-OS

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Severity
MEDIUM4.9
Exploit prediction
EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

9.1 ≤ v < 9.1.39.1
Vendor states this is fixed in 8.1.* (unaffected)
Vendor states this is fixed in 9.0.* (unaffected)
Affected range stops below 9.1.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

CVSS

4.9MEDIUMpalo_alto
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-191

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