Overview
Recently, Citrix SD-WAN released a security update to address three vulnerabilities (CVE-2020-8271, CVE-2020-8272, CVE-2020-8273). These vulnerabilities allow an unauthenticated attacker with network access to SD-WAN Center to perform arbitrary code execution as root.
At present, there exist detailed analysis of relevant vulnerabilities and the proof of concept (POC) concerning CVE-2020-8271.
Vulnerability Description
| CVE | Vulnerability Impact | Pre-conditions |
| CVE-2020-8271 | Unauthenticated remote code execution with root privileges | An attacker must be able to communicate with SD-WAN Center’s Management IP/FQDN. |
| CVE-2020-8272 | Authentication bypass resulting in exposure of SD-WAN functionality | |
| CVE-2020-8273 | Privilege escalation of an authenticated user to root | The attacker must be an authenticated user on SD-WAN Center. |
Affected Versions
- Citrix SD-WAN before 11.2.2
- Citrix SD-WAN before 11.1.2b
- Citrix SD-WAN before 10.2.8
Unaffected Versions
- Citrix SD-WAN 11.2.2 and later versions of Citrix SD-WAN 11.2
- Citrix SD-WAN 11.1.2b and later versions of Citrix SD-WAN 11.1
- Citrix SD-WAN 10.2.8 and later versions of Citrix SD-WAN 10.2
Solution
Citrix has released the latest versions to fix the preceding vulnerabilities. Affected users are advised to upgrade as soon as possible.
The latest versions are available at the following link:
Reference Links
Statement
This advisory is only used to describe a potential risk. NSFOCUS does not provide any commitment or promise on this advisory. NSFOCUS and the author will not bear any liability for any direct and/or indirect consequences and losses caused by transmitting and/or using this advisory. NSFOCUS reserves all the rights to modify and interpret this advisory. Please include this statement paragraph when reproducing or transferring this advisory. Do not modify this advisory, add/delete any information to/from it, or use this advisory for commercial purposes without permission from NSFOCUS.
About NSFOCUS
NSFOCUS, Inc., a global network and cyber security leader, protects enterprises and carriers from advanced cyber attacks. The company’s Intelligent Hybrid Security strategy utilizes both cloud and on-premises security platforms, built on a foundation of real-time global threat intelligence, to provide multi-layered, unified and dynamic protection against advanced cyber attacks.
NSFOCUS works with Fortune Global 500 companies, including four of the world’s five largest financial institutions, organizations in insurance, retail, healthcare, critical infrastructure industries as well as government agencies. NSFOCUS has technology and channel partners in more than 60 countries, is a member of both the Microsoft Active Protections Program (MAPP), and the Cloud Security Alliance (CSA). A wholly owned subsidiary of NSFOCUS Technologies Group Co., Ltd., the company has operations in the Americas, Europe, the Middle East and Asia Pacific.
