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.

CrowdSec network observations suggest that most exploitation of CVE-2023-3519 involves focused reconnaissance to identify viable targets. Attackers typically tailor their campaigns based on system exposure and configuration. It is unlikely that a given attack is accidental. 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.