Citrix NetScaler ADC and NetScaler Gateway Buffer Overflow
What to do
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 deadline 2023-11-08 · passed 2 years 10 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
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.
Who is affected
Citrix NetScaler ADC and NetScaler Gateway. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-119.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 2 years 10 months ago
Sources
- NVD entry for CVE-2023-4966 nvd.nist.gov/vuln/detail/CVE-2023-4966
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- netscaler.com www.netscaler.com/blog/news/cve-2023-4966-critical-security-update-now-available-for-netscaler-adc-and-netscaler-gateway/
- support.citrix.com support.citrix.com/article/CTX579459/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20234966-and-cve20234967
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2023-4966