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From "Lukasz Lenart (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (WW-4647) Security: OGNL can change the MemberAccess in OGNLContext
Date Fri, 17 Jun 2016 04:23:05 GMT

    [ https://issues.apache.org/jira/browse/WW-4647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15335376#comment-15335376
] 

Lukasz Lenart commented on WW-4647:
-----------------------------------

This was already fixed by changing how Struts is using OGNL and disabling access to arithmetic
operations. And next time please report any security vulnerabilities to security@struts.apache.org
- making them public (as here) is irresponsible and makes hacker's life easier. I'm going
to delete this issue.

> Security: OGNL can change the MemberAccess in OGNLContext
> ---------------------------------------------------------
>
>                 Key: WW-4647
>                 URL: https://issues.apache.org/jira/browse/WW-4647
>             Project: Struts 2
>          Issue Type: Bug
>          Components: Core Actions
>    Affects Versions: 2.3.20
>            Reporter: Raintung Li
>            Priority: Critical
>             Fix For: 2.3.30, 2.5.2
>
>         Attachments: SecurityOGNLContext.java
>
>
> OGNL example: S2-029 leak: 
> #_memberAccess.excludedClasses=#{}.keySet() it has been fixed.
> But now we can direct change the _memberAccess in the OGNLContext
> #_memberAccess=@ognl.OgnlContext@DEFAULT_MEMBER_ACCESS
> woo.. it can round the SecurityMemberAccess.isAccessible checking, because modify the
OGNLContext member _memberaccess that NOT check the accessible.
> Struts should be self extend the OGNLContent to make securityOGNLContect to keep safe.



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