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AUSCERT External Security Bulletin Redistribution
ESB-2020.1702
PAN-OS: Improper SAML SSO authorization of shared local users
14 May 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: PAN OS
Publisher: Palo Alto
Operating System: Network Appliance
Impact/Access: Unauthorised Access -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-1998
Original Bulletin:
https://securityadvisories.paloaltonetworks.com/CVE-2020-1998
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Palo Alto Networks Security Advisories / CVE-2020-1998
CVE-2020-1998 PAN-OS: Improper SAML SSO authorization of shared local users
047910
Severity 5.4 . MEDIUM
Attack Vector NETWORK
Attack Complexity LOW
Privileges Required LOW
User Interaction NONE
Scope UNCHANGED
Confidentiality Impact LOW
Integrity Impact LOW
Availability Impact NONE
NVD JSON
Published: 2020-05-13
Updated: 2020-05-13
Ref#: PAN-108992
Description
An improper authorization vulnerability in PAN-OS that mistakenly uses the
permissions of local linux users instead of the intended SAML permissions of
the account when the username is shared for the purposes of SSO authentication.
This can result in authentication bypass and unintended resource access for the
user.
This issue affects:
PAN-OS 7.1 versions earlier than 7.1.26;
All versions of PAN-OS 8.0;
PAN-OS 8.1 versions earlier than 8.1.13;
PAN-OS 9.0 versions earlier than 9.0.6;
PAN-OS 9.1 versions earlier than 9.1.1.
Product Status
PAN-OS
Versions Affected Unaffected
9.1 < 9.1.1 >= 9.1.1
9.0 < 9.0.6 >= 9.0.6
8.1 < 8.1.13 >= 8.1.13
8.0 8.0.*
7.1 < 7.1.26 >= 7.1.26
Severity: MEDIUM
CVSSv3.1 Base Score: 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N)
Solution
This issue is fixed in PAN-OS 7.1.26, PAN-OS 8.1.13, PAN-OS 9.0.6, PAN-OS
9.1.1, and all later PAN-OS versions.
PAN-OS 8.0 is now end-of-life as of October 31, 2019, and is no longer covered
by our Product Security Assurance policies.
Workarounds and Mitigations
The impact of this vulnerability can be mitigated by removing shared usernames
between local linux users and SAML enabled users.
Acknowledgements
Palo Alto Networks would like to thank Maurice Lok-Hin for discovering and
reporting this issue.
Timeline
2020-05-13 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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