J2EE Misconfiguration: Weak Access Permissions for EJB Methods

If elevated access rights are assigned to EJB methods, then an attacker can take advantage of the permissions to exploit the software system.


Description

If the EJB deployment descriptor contains one or more method permissions that grant access to the special ANYONE role, it indicates that access control for the application has not been fully thought through or that the application is structured in such a way that reasonable access control restrictions are impossible.

Demonstrations

The following examples help to illustrate the nature of this weakness and describe methods or techniques which can be used to mitigate the risk.

Note that the examples here are by no means exhaustive and any given weakness may have many subtle varieties, each of which may require different detection methods or runtime controls.

Example One

The following deployment descriptor grants ANYONE permission to invoke the Employee EJB's method named getSalary().

<ejb-jar>
  ...
  <assembly-descriptor>
    <method-permission>
      <role-name>ANYONE</role-name>
      <method>
      <ejb-name>Employee</ejb-name>
      <method-name>getSalary</method-name>
    </method-permission>
  </assembly-descriptor>
  ...
</ejb-jar>

See Also

SFP Primary Cluster: Privilege

This category identifies Software Fault Patterns (SFPs) within the Privilege cluster (SFP36).

7PK - Environment

This category represents one of the phyla in the Seven Pernicious Kingdoms vulnerability classification. It includes weaknesses that are typically introduced during un...

Comprehensive CWE Dictionary

This view (slice) covers all the elements in CWE.

Weaknesses without Software Fault Patterns

CWE identifiers in this view are weaknesses that do not have associated Software Fault Patterns (SFPs), as covered by the CWE-888 view. As such, they represent gaps in...

Weaknesses Introduced During Implementation

This view (slice) lists weaknesses that can be introduced during implementation.


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