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AUSCERT External Security Bulletin Redistribution
ESB-2020.1279
PAN-OS on PA-7000 Series: Varrcvr daemon network-based
denial of service or privilege escalation
9 April 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: PA-7000 Series devices
Publisher: Palo Alto
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-1992
Original Bulletin:
https://securityadvisories.paloaltonetworks.com/CVE-2020-1992
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Palo Alto Networks Security Advisories / CVE-2020-1992
CVE-2020-1992 PAN-OS on PA-7000 Series: Varrcvr daemon network-based denial of
service or privilege escalation
Severity 8.1 . HIGH
Attack Vector NETWORK
Attack Complexity HIGH
Privileges Required NONE
User Interaction NONE
Scope UNCHANGED
Confidentiality Impact HIGH
Integrity Impact HIGH
Availability Impact HIGH
NVD JSON
Published: 2020-04-08
Updated: 2020-04-08
Ref#: PAN-135103
Description
A format string vulnerability in the Varrcvr daemon of PAN-OS on PA-7000 Series
devices with a Log Forwarding Card (LFC) allows remote attackers to crash the
daemon creating a denial of service condition or potentially execute code with
root privileges.
This issue affects Palo Alto Networks PAN-OS 9.0 versions before 9.0.7; PAN-OS
9.1 versions before 9.1.2 on PA-7000 Series devices with an LFC installed and
configured.
This issue requires WildFire services to be configured and enabled.
This issue does not affect PAN-OS 8.1 and earlier releases.
This issue does not affect any other PA Series firewalls.
Product Status
PAN-OS
Versions Affected Unaffected
9.0 < 9.0.7 on PA-7000 series with LFC >= 9.0.7 on PA-7000 series with LFC
9.1 < 9.1.2 on PA-7000 series with LFC >= 9.1.2 on PA-7000 series with LFC
8.1 8.1.*
8.0 8.0.*
7.1 7.1.*
Required Configuration
This issue requires WildFire services to be configured and enabled.
Severity: HIGH
CVSSv3.1 Base Score: 8.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Solution
This issue is fixed in PAN-OS 9.0.7, PAN-OS 9.1.2 and all later versions.
Workarounds and Mitigations
There are no viable workarounds for this issue.
Acknowledgements
This issue was found by a customer.
Timeline
2020-04-08 Initial publication
Terms of usePrivacyProduct Security Assurance and Vulnerability Disclosure
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(C) 2020 Palo Alto Networks, Inc. All rights reserved.
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