(RHSA-2012:1013) Moderate: jbossas security update

The Java Authorization Contract for Containers (Java ACC) specification
defines Permission classes and the binding of container access decisions to
operations on instances of these permission classes. JaccAuthorizationRealm
performs authorization based on Java ACC permissions and a Policy
implementation.

When a JBoss server is configured to use JaccAuthorizationRealm, the
WebPermissionMapping class creates permissions that are not checked and can
permit access to users without checking their roles. If the
ignoreBaseDecision property is set to true on JBossWebRealm, the web
authorization process is handled exclusively by JBossAuthorizationEngine,
without any input from JBoss Web. This allows any valid user to access an
application, without needing to be assigned the role specified in the
application’s web.xml “security-constraint” tag. (CVE-2012-1167)

Warning: Before applying this update, back up your JBoss Enterprise
Application Platform’s “jboss-as/server/[PROFILE]/deploy/” directory, along
with all other customized configuration files.

All users of JBoss Enterprise Application Platform 5.1.2 as provided from
the Red Hat Customer Portal are advised to install this update.