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AUSCERT External Security Bulletin Redistribution
ESB-2020.4047
Citrix SDWAN Center Security Update
13 November 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Citrix SD-WAN Center
Publisher: Citrix
Operating System: Network Appliance
Impact/Access: Root Compromise -- Remote/Unauthenticated
Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-8273 CVE-2020-8272 CVE-2020-8271
Original Bulletin:
https://support.citrix.com/article/CTX285061
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Citrix SDWAN Center Security Update
Reference: CTX285061
Category : Critical
Created : 10 Nov 2020
Modified : 10 Nov 2020
Applicable Products
o Citrix SD-WAN
Description of Problem
Multiple vulnerabilities have been discovered in Citrix SD-WAN Center that, if
exploited, could allow an unauthenticated attacker with network
access to SD-WAN Center to perform arbitrary code execution as root.
These vulnerabilities have the following identifiers:
+-------------+-----------------------+----------------------+------------------+
|CVE |Description |Vulnerability Type |Pre-conditions |
+-------------+-----------------------+----------------------+------------------+
| | | |An attacker must |
| |Unauthenticated remote | |be able to |
|CVE-2020-8271|code execution with |CWE-23: Path Traversal|communicate with |
| |root privileges | |SD-WAN Center's |
| | | |Management IP/FQDN|
+-------------+-----------------------+----------------------+------------------+
| | | |An attacker must |
| |Authentication | |be able to |
|CVE-2020-8272|Bypass resulting in |CWE-287: Improper |communicate |
| |exposure |Authentication |with SD-WAN |
| |of SD-WAN functionality| |Center's |
| | | |Management IP/FQDN|
+-------------+-----------------------+----------------------+------------------+
| | |CWE-78: Improper |The attacker must |
| |Privilege escalation |Neutralization of |be an |
|CVE-2020-8273|of an authenticated |Special Elements used |authenticated user|
| |user to root |in an OS Command ('OS |on SD-WAN Center |
| | |Command Injection') | |
+-------------+-----------------------+----------------------+------------------+
The following supported versions of Citrix SD-WAN Center are affected by these issues:
o CitrixSD-WAN11.2 before11.2.2
o CitrixSD-WAN11.1 before 11.1.2b
o CitrixSD-WAN10.2 before 10.2.8
Other versions are now End of Life and no longer supported.
Mitigating Factors
Citrix SD-WAN Center is an internal management platform for Citrix SD-WAN and access
to Citrix SD-WAN Center is likely to be restricted.
What Customers Should Do
The issues have been addressed in the following versions of Citrix SD-WAN Center:
o Citrix SD-WAN 11.2.2 and later versions of Citrix SD-WAN 11.2
o Citrix SD-WAN 11.1.2b and later versions of Citrix SD-WAN 11.1
o Citrix SD-WAN 10.2.8 and later versions of Citrix SD-WAN 10.2
Affected customers are strongly recommended to immediately update their
deployments.
The latest versions of Citrix SD-WAN Cente rare available at: https://www.citrix.com/
en-gb/downloads/citrix-sd-wan/
Acknowledgements
Citrix would like to thank Ariel Tempelhof of RealmodeLabs for working with us to
protect Citrix customers.
Changelog
+--------------------------+--------------------------------------------------+
|Date |Change |
+--------------------------+--------------------------------------------------+
|2020-11-10 |Initial Publication |
+--------------------------+--------------------------------------------------+
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