CVE-2023-4966 — Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability
CVE-2023-4966: Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow Vulnerability
CISA Known Exploited Vulnerability (KEV)
| Vendor / project | Citrix |
| Product | NetScaler ADC and NetScaler Gateway |
| Date added | 2023-10-18 |
| Due date | 2023-11-08 |
| Ransomware campaign use | Known |
Description
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.
Required action (CISA)
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.
Notes
https://www.netscaler.com/blog/news/cve-2023-4966-critical-security-update-now-available-for-netscaler-adc-and-netscaler-gateway/, https://support.citrix.com/article/CTX579459/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20234966-and-cve20234967 ; https://nvd.nist.gov/vuln/detail/CVE-2023-4966
References
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-4966
- KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog