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AUSCERT External Security Bulletin Redistribution
ESB-2020.3113
CVE-2020-2039 PAN-OS: Management web interface
denial-of-service (DoS) through unauthenticated file upload
10 September 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: PAN-OS
Publisher: Palo Alto
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-2039
Original Bulletin:
https://securityadvisories.paloaltonetworks.com/CVE-2020-2039
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Palo Alto Networks Security Advisories / CVE-2020-2039
CVE-2020-2039 PAN-OS: Management web interface denial-of-service (DoS) through
unauthenticated file upload
047910
Severity 5.3 . MEDIUM
Attack Vector NETWORK
Attack Complexity LOW
Privileges Required NONE
User Interaction NONE
Scope UNCHANGED
Confidentiality Impact NONE
Integrity Impact NONE
Availability Impact LOW
NVD JSON
Published 2020-09-09
Updated 2020-09-09
Reference PAN-148806
Discovered externally
Description
An uncontrolled resource consumption vulnerability in Palo Alto Networks PAN-OS
allows for a remote unauthenticated user to upload temporary files through the
management web interface that are not properly deleted after the request is
finished. It is possible for an attacker to disrupt the availability of the
management web interface by repeatedly uploading files until available disk
space is exhausted.
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
Versions Affected Unaffected
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: MEDIUM
CVSSv3.1 Base Score: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Weakness Type
CWE-400 Uncontrolled Resource Consumption
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
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 PAN-OS
management web 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
Palo Alto Networks thanks Mikhail Klyuchnikov and Nikita Abramov of Positive
Technologies for discovering and reporting this issue.
Timeline
2020-09-09 Initial publication
Terms of usePrivacyProduct Security Assurance and Vulnerability Disclosure
Policy Report vulnerabilitiesManage subscriptions
(C) 2020 Palo Alto Networks, Inc. All rights reserved.
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