An updated jbossas package that corrects a security vulnerability is now
available for Red Hat Application Stack.
This update has been rated as having critical security impact by the Red
Hat Security Response Team.
JBoss Application Server is a J2EE certified platform for developing and
deploying enterprise Java applications, Web applications, and Portals.
Symantec discovered a flaw in the DeploymentFileRepository class of the
JBoss Application Server. A remote attacker who is able to access the
console manager could read or write to files with the permissions of the
JBoss user. This could potentially lead to arbitrary code execution as the
jboss user. (CVE-2006-5750)
For the Red Hat Application Stack, the jbossas service is not enabled by
default. Once the jbossas service is enabled, the console manager will
become accessible on port 8080. Although port 8080 will be blocked from
outside access by the default Red Hat Enterprise Linux firewall rules,
users should ensure that the console is not available publicly and is
adequately protected by authentication as explained in the JBoss
documentation. A correct configuration of the JBoss Application Server
would mitigate this vulnerability to only being exploitable by users who
have authorization to use the console manager.
All users of Red Hat Application Stack are advised to upgrade to these
updated packages, which resolve the directory traversal issue with a
These updated packages also contain a change to the default jbossas
configuration file. For users installing Red Hat Application Stack for the
first time, all JBoss Application Server network services, including the
management consoles, will be restricted by default to localhost. No change
is made for users upgrading previously installed jbossas packages.
Users who already have Red Hat Application Stack installed should check to
make sure that they have correctly followed the security guidelines and
that the management consoles are not accessible to unauthorized users.
Red Hat would like to thank Symantec for reporting this issue.