CVE-2016-20031

CVE-2016-20031 affects ZKTeco ZKBioSecurity 3.0 (visLogin.jsp). The vulnerability enables a local authorization bypass by spoofing localhost requests; EnvironmentUtil.getClientIp() maps IPv6 loopback 0:0:0:0:0:0:0:1 to 127.0.0.1 and uses that IP as the username with a hardcoded password (123456) ...