THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Who should read this | All Struts 2 developers and users |
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Impact of vulnerability | Permissions, Privileges, and Access Controls |
Maximum security rating | Important |
Recommendation | Developers should immediately upgrade to Struts 2.3.15.23 |
Affected Software | Struts 2.0.0 - Struts 2.3.15.2 |
Reporter | Zhu Gang, Zhang Jin, Huawei PSIRT |
CVE Identifier |
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In Struts 2 before 2.3.15.23, under certain conditions this can be used to bypass security constraints. More details will available later on when the patch will be widely adopted.
Solution
In Struts 2.3.15.2 3 the action mapping mechanism was changed to avoid circumventing security constraints. Two additional constants were introduced to steer behaviour of DefaultActionMapper:
- struts.mapper.action.prefix.enabled - when set to false support for "action:" prefix is disabled, set to false by default
- struts.mapper.action.prefix.crossNamespaces - when set to false, actions defined with "action:" prefix must be in the same namespace as current action
Another option is to write your own ActionMapper and completely drop support for "action:" prefix if support for multiple submit buttons isn't used. Consult manual how to write your own ActionMapper.
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After upgrading to Struts >= 2.3.15.23, applications using the "action:" should still work as expectedwill stop working. You can use above constants to steer that behaviour. |
| Warning |
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It is strongly recommended to upgrade to Struts 2.3.15.23, which contains the corrected Struts2-Core library. |