CVE-2023-4966 vulnerability in Citrix Products
Published on October 10, 2023
Sensitive information disclosure in NetScaler ADC and NetScaler Gateway when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA ?virtual?server.
Known Exploited Vulnerability
This Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Citrix NetScaler ADC and NetScaler Gateway contain a buffer overflow vulnerability that allows for sensitive information disclosure when configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server.
The following remediation steps are recommended / required by November 8, 2023: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vulnerability Analysis
CVE-2023-4966 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Products Associated with CVE-2023-4966
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What versions are vulnerable to CVE-2023-4966?
- Citrix Netscaler Gateway Version 14.1 Fixed in Version 14.1-8.50
- Citrix Netscaler Gateway Version 13.0 Fixed in Version 13.0-92.19
- Citrix Netscaler Gateway Version 13.1 Fixed in Version 13.1-49.15
- Citrix Netscaler Application Delivery Controller Version 13.0 Fixed in Version 13.0-92.19
- Citrix Netscaler Application Delivery Controller Version 13.1 Fixed in Version 13.1-49.15
- Citrix Netscaler Application Delivery Controller Version 12.1 Fixed in Version 12.1-55.300
- Citrix Netscaler Application Delivery Controller Version 12.1 Fixed in Version 12.1-55.300
- Citrix Netscaler Application Delivery Controller Version 13.1 Fixed in Version 13.1-37.164
- Citrix Netscaler Application Delivery Controller Version 14.1 Fixed in Version 14.1-8.50