CVE-2016-0762 – tomcat: timing attack in Realm implementation

https://notcve.org/view.php?id=CVE-2016-0762

The Realm implementations in Apache Tomcat versions 9.0.0.M1 to 9.0.0.M9, 8.5.0 to 8.5.4, 8.0.0.RC1 to 8.0.36, 7.0.0 to 7.0.70 and 6.0.0 to 6.0.45 did not process the supplied password if the supplied user name did not exist. This made a timing attack possible to determine valid user names. Note that the default configuration includes the LockOutRealm which makes exploitation of this vulnerability harder. Las implementaciones Realm en Apache Tomcat versiones 9.0.0.M1 a 9.0.0.M9, 8.5.0 a 8.5.4, 8.0.0.RC1 a 8.0.36, 7.0.0 a 7.0.70, y 6.0.0 a 6.0.45 no procesaban la contraseña proporcionada si el nombre de usuario proporcionado no existía. Esto hizo posible la realización de un ataque basado en tiempo para determinar nombres de usuario válidos. • http://rhn.redhat.com/errata/RHSA-2017-0457.html http://www.debian.org/security/2016/dsa-3720 http://www.securityfocus.com/bid/93939 http://www.securitytracker.com/id/1037144 https://access.redhat.com/errata/RHSA-2017:0455 https://access.redhat.com/errata/RHSA-2017:0456 https://access.redhat.com/errata/RHSA-2017:2247 https://lists.apache.org/thread.html/1872f96bad43647832bdd84a408794cd06d9cbb557af63085ca10009%40%3Cannounce.tomcat.apache.org%3E https://lists.apache.org/thread.html/343558d982879bf88e • CWE-203: Observable Discrepancy •