CVE-2020-2031

PAN-OS: Integer underflow in the management interface

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

Solution:

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

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.

Category

4.9
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.32%
Vendor Advisory paloaltonetworks.com
Affected: Palo Alto Networks PAN-OS
Published at:
Updated at:

References

Link Tags
https://security.paloaltonetworks.com/CVE-2020-2031 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-2031?
CVE-2020-2031 has been scored as a medium severity vulnerability.
How to fix CVE-2020-2031?
To fix CVE-2020-2031: This issue is fixed in PAN-OS 9.1.3 and all later PAN-OS versions.
Is CVE-2020-2031 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-2031 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-2031?
CVE-2020-2031 affects Palo Alto Networks PAN-OS.
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