CVE-2007-3998

La función wordwrap del PHP 4 anterior al 4.4.8 y el PHP 5 anterior al 5.2.4, no utiliza correctamente la variable breakcharlen, lo que permite a atacantes remotos provocar una denegación de servicio (error de división por cero y caída de la aplicación o bucle infinito) a través de ciertos argumentos, como lo demostrado con el establecimiento del argumento 'chr(0), 0, ""'.

Several vulnerabilities have been discovered in PHP version 4, a server-side, HTML-embedded scripting language. The session_start function allows remote attackers to insert arbitrary attributes into the session cookie via special characters in a cookie that is obtained from various parameters. A denial of service was possible through a malicious script abusing the glob() function. Certain maliciously constructed input to the wordwrap() function could lead to a denial of service attack. Large len values of the stspn() or strcspn() functions could allow an attacker to trigger integer overflows to expose memory or cause denial of service. The escapeshellcmd API function could be attacked via incomplete multibyte chars.