CyberRota Analysis
AI-GeneratedThe eml_parser Python module is vulnerable to a denial-of-service attack due to inefficient handling of nested parentheses in Received: headers, leading to significant CPU resource consumption during parsing. Attackers can exploit this vulnerability by submitting EML files with deeply nested parentheses, resulting in increased latency and potential service outages in systems relying on this module. Organizations using eml_parser prior to version 3.0.2 should prioritize upgrading to mitigate the risk of service disruption.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
eml_parser serves as a python module for parsing eml files and returning various information found in the e-mail as well as computed information. Prior to 3.0.2, eml_parser.routing.noparenthesis in eml_parser/routing.py removes parenthesized CFWS comments from Received: headers with a regex-based fix-point loop whose running time is quadratic in the nesting depth. A single Received: header with 5,000 nested parentheses causes approximately 1.3 seconds of CPU saturation per parsed message, and doubling the nesting depth approximately quadruples the running time. An attacker can submit relatively small EML files that consume multiple seconds of processing time, causing worker latency, queue backpressure, and possible service-level outages in synchronous gateways, sandboxes, and real-time triage pipelines. This issue is fixed in version 3.0.2.