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AUSCERT External Security Bulletin Redistribution
ESB-2020.3118
PAN-OS: Multiple Vulnerabilities
10 September 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Pan-OS
Publisher: Palo Alto
Operating System: Network Appliance
Impact/Access: Root Compromise -- Remote/Unauthenticated
Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Cross-site Scripting -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-2040 CVE-2020-2036
Original Bulletin:
https://securityadvisories.paloaltonetworks.com/CVE-2020-2036
https://securityadvisories.paloaltonetworks.com/CVE-2020-2040
Comment: This bulletin contains two (2) Palo Alto security advisories.
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Palo Alto Networks Security Advisories / CVE-2020-2036
CVE-2020-2036 PAN-OS: Reflected Cross-Site Scripting (XSS) vulnerability in
management web interface
047910
Severity 8.8 . HIGH
Attack Vector NETWORK
Attack Complexity LOW
Privileges Required NONE
User Interaction REQUIRED
Scope UNCHANGED
Confidentiality Impact HIGH
Integrity Impact HIGH
Availability Impact HIGH
NVD JSON
Published 2020-09-09
Updated 2020-09-09
Reference PAN-116720
Discovered externally
Description
A reflected cross-site scripting (XSS) vulnerability exists in the PAN-OS
management web interface. A remote attacker able to convince an administrator
with an active authenticated session on the firewall management interface to
click on a crafted link to that management web interface could potentially
execute arbitrary JavaScript code in the administrator's browser and perform
administrative actions.
This issue impacts:
PAN-OS 8.1 versions earlier than PAN-OS 8.1.16;
PAN-OS 9.0 versions earlier than PAN-OS 9.0.9.
Product Status
Versions Affected Unaffected
PAN-OS 10.0 None >= 10.0.0
PAN-OS 9.1 None >= 9.1.0
PAN-OS 9.0 < 9.0.9 >= 9.0.9
PAN-OS 8.1 < 8.1.16 >= 8.1.16
Severity: HIGH
CVSSv3.1 Base Score: 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Weakness Type
CWE-79 Cross-site Scripting (XSS)
Solution
This issue is fixed in PAN-OS 8.1.16, PAN-OS 9.0.9, and all later PAN-OS
versions.
Workarounds and Mitigations
Administrators should use caution when they are authenticated to the firewall
management web interface and not click or open links from unsolicited sources.
This issue impacts the management web interface of PAN-OS. 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 and Ben Nott of Palo Alto Networks 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.
- ----------------------------------------------------------------------------------------------------------------------------------
Palo Alto Networks Security Advisories / CVE-2020-2040
CVE-2020-2040 PAN-OS: Buffer overflow when Captive Portal or Multi-Factor
Authentication (MFA) is enabled
047910
Severity 9.8 . CRITICAL
Attack Vector NETWORK
Attack Complexity LOW
Privileges Required NONE
User Interaction NONE
Scope UNCHANGED
Confidentiality Impact HIGH
Integrity Impact HIGH
Availability Impact HIGH
NVD JSON
Published 2020-09-09
Updated 2020-09-09
Reference PAN-145149, PAN-145150, PAN-145151 and PAN-145195
Discovered internally
Description
A buffer overflow vulnerability in PAN-OS allows an unauthenticated attacker to
disrupt system processes and potentially execute arbitrary code with root
privileges by sending a malicious request to the Captive Portal or Multi-Factor
Authentication interface.
This issue impacts:
All versions of PAN-OS 8.0;
PAN-OS 8.1 versions earlier than PAN-OS 8.1.15;
PAN-OS 9.0 versions earlier than PAN-OS 9.0.9;
PAN-OS 9.1 versions earlier than PAN-OS 9.1.3.
Product Status
Versions Affected Unaffected
PAN-OS 10.0 None >= 10.0.0
PAN-OS 9.1 < 9.1.3 >= 9.1.3
PAN-OS 9.0 < 9.0.9 >= 9.0.9
PAN-OS 8.1 < 8.1.15 >= 8.1.15
PAN-OS 8.0 8.0.*
Required Configuration for Exposure
This issue is applicable only where either Captive Portal or Multi-Factor
Authentication (MFA) is enabled.
Severity: CRITICAL
CVSSv3.1 Base Score: 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Weakness Type
CWE-120 Buffer Overflow
Solution
This issue is fixed in PAN-OS 8.1.15, PAN-OS 9.0.9, PAN-OS 9.1.3, and all later
PAN-OS versions.
All Prisma Access services are now upgraded to resolve this issue and are no
longer vulnerable.
PAN-OS 7.1 and 8.0 are end-of-life and are no longer covered by our Product
Security Assurance policies.
Workarounds and Mitigations
Until PAN-OS software is upgraded to a fixed version, enabling signatures in
content update version 8317 will block attacks against CVE-2020-2040.
Acknowledgments
This issue was found by Yamata Li of Palo Alto Networks during internal
security review.
Frequently Asked Questions
Q. Has this been exploited in the wild?
This issue was discovered during internal security review. No evidence of
active exploitation has been identified as of this time.
Q. Are there any indicators of compromise or breach due to this vulnerability?
No.
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.
- --------------------------END INCLUDED TEXT--------------------
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