20 vulnerabilities classified as CWE-185 (不正确的正则表达式). AI Chinese analysis included.
CWE-185 represents a logic flaw where a software product specifies a regular expression that fails to properly match or compare input data. This weakness typically arises from ambiguous patterns, insufficient anchoring, or incorrect quantifiers, leading to unintended matches. Attackers exploit this vulnerability by crafting malicious inputs that bypass intended filtering or validation mechanisms, such as injection attacks or unauthorized access attempts. By slipping past these security controls, adversaries can execute arbitrary code, access restricted resources, or corrupt data integrity. To mitigate this risk, developers must rigorously test regex patterns against edge cases and known attack vectors. Utilizing established, well-vetted libraries and adhering to strict input validation standards ensures that expressions accurately reflect security requirements, thereby preventing bypasses and maintaining robust application defenses against sophisticated exploitation techniques.
$phone = GetPhoneNumber(); if ($phone =~ /\d+-\d+/) { # looks like it only has hyphens and digits system("lookup-phone $phone"); } else { error("malformed number!"); }import subprocess import re def validate_ip_regex(ip: str): ip_validator = re.compile(r"((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4}") if ip_validator.match(ip): return ip else: raise ValueError("IP address does not match valid pattern.") def run_ping_regex(ip: str): validated = validate_ip_regex(ip) # The ping command treats zero-prepended IP addresses as octal result = subprocess.call(["ping", validated]) print(result)Vulnerabilities classified as CWE-185 (不正确的正则表达式) represent 20 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.