Home/CVE/An integer underflow vulnerability in the dnsproxyd component of the PAN-OS management interface allows authenticated ad
CVE

CVE-2020-2031

An integer underflow vulnerability in the dnsproxyd component of the PAN-OS management interface allows authenticated ad

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.

MEDIUM · CVSS 4.9 EPSS 0.00319
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-191Integer Underflow (Wrap or Wraparound)
CWE-191Integer Underflow (Wrap or Wraparound)
▤

Affected Products & Versions

1
paloaltonetworks pan-os>= 9.1.0 and < 9.1.3
▣

Scoring & Timeline

4.9
MEDIUM · CVSS v3.1 · psirt@paloaltonetworks.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD08 Jul 2020 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://security.paloaltonetworks.com/CVE-2020-2031Vendor Advisory
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