Researchers Uncover Nuclei Vulnerability Enabling Signature Bypass and Code Execution

Category	Details
Threat Actors	Not explicitly mentioned; potential attackers exploiting flaws in Nuclei templates.
Campaign Overview	A security flaw in Nuclei (CVE-2024-43405) allows attackers to bypass signature checks and execute arbitrary code via malicious templates.
Target Regions (Or Victims)	Organizations using Nuclei, especially those running untrusted or community-contributed templates.
Methodology	• Exploits YAML parser and signature verification discrepancies. • Injection of malicious content via \r character.
Product Targeted	Nuclei vulnerability scanner, used for scanning applications, infrastructure, cloud platforms, and networks.
Malware Reference	Not a specific malware, but arbitrary code execution is possible due to the vulnerability.
Tools Used	Nuclei (vulnerability scanner), YAML parser, Go’s regex for signature validation.
Vulnerabilities Exploited	Flaw in template signature verification and YAML parser mismatch.
TTPs	• Crafting malicious templates with bypassed signature verification. • Injection of malicious code.
Attribution	No specific attribution, but potential for exploitation by threat actors using untrusted templates.
Recommendations	• Validate templates thoroughly before execution. • Use trusted templates and isolate community-contributed templates.
Source	The Hackers News

Read full article: https://thehackernews.com/2025/01/researchers-uncover-nuclei.html
The above summary has been generated by an AI language model