Due to insufficient error checking in some authentication classes, Tomcat allows for the enumeration (brute force testing) of user names by supplying illegally URL encoded passwords. The attack is possible if FORM based authenticiaton (j_security_check) with either the MemoryRealm, DataSourceRealm or JDBCRealm.
Patchset for tomcat5: http://svn.apache.org/viewvc?view=rev&revision=781379 Patchset for tomcat6: http://svn.apache.org/viewvc?view=rev&revision=747840
This issue has been addressed in following products: JBEAP 4.3.0 for RHEL 5 Via RHSA-2009:1145 https://rhn.redhat.com/errata/RHSA-2009-1145.html
This issue has been addressed in following products: JBEAP 4.3.0 for RHEL 4 Via RHSA-2009:1146 https://rhn.redhat.com/errata/RHSA-2009-1146.html
This issue has been addressed in following products: JBEAP 4.2.0 for RHEL 5 Via RHSA-2009:1143 https://rhn.redhat.com/errata/RHSA-2009-1143.html
This issue has been addressed in following products: JBEAP 4.2.0 for RHEL 4 Via RHSA-2009:1144 https://rhn.redhat.com/errata/RHSA-2009-1144.html
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Via RHSA-2009:1164 https://rhn.redhat.com/errata/RHSA-2009-1164.html
This issue has been addressed in following products: JBEWS 1.0.0 for RHEL 4 JBEWS 1.0.0 for RHEL 5 Via RHSA-2009:1454 https://rhn.redhat.com/errata/RHSA-2009-1454.html
This issue has been addressed in following products: JBEWS 1.0.0 for RHEL 5 JBEWS 1.0.0 for RHEL 4 Via RHSA-2009:1506 https://rhn.redhat.com/errata/RHSA-2009-1506.html
This issue has been addressed in following products: RHAPS Version 2 for RHEL 4 Via RHSA-2009:1562 https://rhn.redhat.com/errata/RHSA-2009-1562.html
This issue has been addressed in following products: Red Hat Developer Suite V.3 Via RHSA-2009:1563 https://rhn.redhat.com/errata/RHSA-2009-1563.html
This issue has been addressed in following products: Red Hat Network Satellite Server v 5.2 Red Hat Network Satellite Server v 5.3 Via RHSA-2009:1616 https://rhn.redhat.com/errata/RHSA-2009-1616.html
This issue has been addressed in following products: Red Hat Certificate System 7.3 Via RHSA-2010:0602 https://rhn.redhat.com/errata/RHSA-2010-0602.html
All children bugs are closed, closing parent bug