Perl Net::Statsd::Lite Metric Injection via Unvalidated Input

Net::Statsd::Lite versions through 0.10.0 contain a metric injection vulnerability where the set_add method fails to sanitize values for newlines, colons, and pipes—special characters used as delimiters in the StatsD protocol. This allows attackers who control metric values to inject arbitrary StatsD commands, potentially poisoning monitoring data, triggering false alerts, or disrupting observability systems that rely on accurate metrics. Organizations using this Perl library for application instrumentation and metrics collection are at risk, particularly those processing untrusted data or user input through their monitoring pipelines.

While this CVE maps to CWE-93 (Improper Neutralization of Special Elements in Data Query Construction) rather than specific MITRE ATT&CK techniques, Casky's security skills help practitioners detect injection attack patterns through input validation analysis and protocol-level anomaly detection. A practitioner using Casky would identify that the vulnerability stems from missing input sanitization checks—a critical control gap. Though no MITRE techniques currently map to this CVE, detection would focus on Resource Development and Reconnaissance phases where attackers probe for injection points, followed by Defense Evasion when they attempt to manipulate monitoring systems. Security teams should prioritize upgrading to patched versions and implementing input validation layers that strip or escape newlines, colons, and pipes from any user-controlled metric values before they reach the StatsD client.