NetScaler Gateway - RCE (CVE-2023-3519)

CVE-2023-3519 is a critical vulnerability that allows unauthenticated remote code execution.

CrowdSec has been tracking this vulnerability and its exploits since 15th of December 2023.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2023-3519 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting. Additionally, according to week-over-week analysis by CrowdSec, exploitation of CVE-2023-3519 is surging. Attack volumes are spiking well above historical norms, indicating widespread and escalating interest from threat actors. CVE-2023-3519 is currently experiencing high visibility and active exploitation across the internet.

Exploitation attempts are concentrated on URLs containing /saml/login.