Palo Alto Networks Security Advisories / CVE-2020-2000

CVE-2020-2000 PAN-OS: OS command injection and memory corruption vulnerability

047910
Severity 7.2 · HIGH
Attack Vector NETWORK
Attack Complexity LOW
Privileges Required HIGH
User Interaction NONE
Scope UNCHANGED
Confidentiality Impact HIGH
Integrity Impact HIGH
Availability Impact HIGH

Description

An OS command injection and memory corruption vulnerability in the PAN-OS management web interface that allows authenticated administrators to disrupt system processes and potentially execute arbitrary code and OS commands with root privileges.

This issue impacts:

PAN-OS 8.1 versions earlier than PAN-OS 8.1.16;

PAN-OS 9.0 versions earlier than PAN-OS 9.0.10;

PAN-OS 9.1 versions earlier than PAN-OS 9.1.4;

PAN-OS 10.0 versions earlier than PAN-OS 10.0.1.

Product Status

VersionsAffectedUnaffected
PAN-OS 10.0< 10.0.1>= 10.0.1
PAN-OS 9.1< 9.1.4>= 9.1.4
PAN-OS 9.0< 9.0.10>= 9.0.10
PAN-OS 8.1< 8.1.16>= 8.1.16

Severity: HIGH

CVSSv3.1 Base Score: 7.2 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)

Exploitation Status

Palo Alto Networks is not aware of any malicious exploitation of this issue.

Weakness Type

CWE-20 Improper Input Validation

CWE-78 OS Command Injection

CWE-121 Stack-based Buffer Overflow

Solution

This issue is fixed in PAN-OS 8.1.16, PAN-OS 9.0.10, PAN-OS 9.1.4, PAN-OS 10.0.1, and all later PAN-OS versions.

Workarounds and Mitigations

Until PAN-OS software is upgraded to a fixed version, enabling signatures for Unique Threat ID 59888, and 59891 on a firewall protecting the management interface will block attacks against CVE-2020-2000.

This issue impacts the PAN-OS management web interface but you can mitigate the impact of this issue by following best practices for securing the interface. Please review the Best Practices for Securing Administrative Access in the PAN-OS technical documentation, available at https://docs.paloaltonetworks.com/best-practices.

Acknowledgments

This issue was found by Nicholas Newsom of Palo Alto Networks during internal security review.

Timeline

Added a new workaround
Initial publication
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