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 | Possible Remote Code Execution vulnerability |
Maximum security rating | Important |
Recommendation | Always validate incoming parameters' values when re-assigning them to certain Struts' tags attributes. Don't use %{...} syntax in tag attributes other than value unless you have a valid use-case. Alternatively upgrade to Struts 2.3.20.3, Struts 2.3.24.3 or Struts 2.3.28 |
Affected Software | Struts 2.0.0 - StrutsStruts 2.3.24.1 (except 2.3.20.3) |
Reporters | Romain Gaucher rgaucher at coverity dot com - Coverity Lupin lupin1314 at gmail dot com - jd.com security team nike.zheng at dbappsecurity dot com dot cn - dbappsecurity team genxors at gmail dot com - Qihoo 360 SkyEye Lab |
CVE Identifier | CVE-2016-0785 |
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Don't use forced evaluation of an attribute other than value using %{...} syntax unless really needed for a valid use-case.
By upgrading to Struts 2.3.20.3.27, 2.3.24.3 and 2.3.28, possible malicious effects of forced double evaluation are limited.
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No issues expected when upgrading to Struts 2.3.20.3, 2.3.24.3 and 2.3.28
Workaround
If you are using Struts 2.3.20, 2.3.24 or 2.3.24.1 you can redefine struts.excludedClasses as showed below, for more details please read internal security page.
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