CVE-2020-2031 | BDVDB-2026-138530 Detail

Palo Alto NetworksPAN-OS

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.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.

Weaknesses#

CWE-191 Integer Underflow (Wrap or Wraparound)

References#

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

Exploit#

No public exploit known

History#

Version 12020-07-08Record published in the CVE List.
Version 22024-09-16Most recent update recorded in the CVE List.

Published

Published: 2020-07-08
Last modified: 2024-09-16

Vendor information

Vendor: Palo Alto Networks
Product: PAN-OS

All Palo Alto Networks vulnerabilities

Score

4.9 Medium

EPSS

1.1%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 66.8.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 9.1 and < 9.1.3
Fixed
9.1.3
Vulnerable
Not stated
Fixed
9.1.3

Scoring System

CVSS v4.0

Not available

CVSS v3.1

4.9 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	High
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	None
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).