CVE-2023-4966
CriticalActively exploited (CISA KEV)Known to be used in ransomware campaigns
Description
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.
SeverityCritical
CVSS9.4
Exploit probability100. percentile100%
Product
Citrix NetScaler ADC and NetScaler Gateway
PublishedOct 10, 2023
First seenOct 10, 2023
Added to KEVOct 18, 2023
Weakness typeCWE-119Memory buffer bounds error
How to fix
CISA required action
Apply mitigations and kill all active and persistent sessions per vendor instructions [https://www.netscaler.com/blog/news/cve-2023-4966-critical-security-update-now-available-for-netscaler-adc-and-netscaler-gateway/] OR discontinue use of the product if mitigations are unavailable.
CISA due date: Nov 8, 2023Update
- citrix netscaler_application_delivery_controller12.1-55.300, 13.0-92.19, 13.1-37.164, 13.1-49.15, 14.1-8.50 or later
- citrix netscaler_gateway13.0-92.19, 13.1-49.15, 14.1-8.50 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| citrix netscaler_application_delivery_controller | 12.1 ≤ v < 12.1-55.300, 13.0 ≤ v < 13.0-92.19, 13.1 ≤ v < 13.1-37.164, 13.1 ≤ v < 13.1-49.15, 14.1 ≤ v < 14.1-8.50 | 12.1-55.300, 13.0-92.19, 13.1-37.164, 13.1-49.15, 14.1-8.50 |
| citrix netscaler_gateway | 13.0 ≤ v < 13.0-92.19, 13.1 ≤ v < 13.1-49.15, 14.1 ≤ v < 14.1-8.50 | 13.0-92.19, 13.1-49.15, 14.1-8.50 |
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