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Posted to issues@struts.apache.org by "Lukasz Lenart (JIRA)" <ji...@apache.org> on 2013/07/19 10:34:48 UTC
[jira] [Updated] (WW-4146) cache attack at OgnlUtil.expressions
[ https://issues.apache.org/jira/browse/WW-4146?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lukasz Lenart updated WW-4146:
------------------------------
Description:
in class com.opensymphony.xwork2.ognl.OgnlUtil, code :
{code:java}
tree = expressions.get(expression);
if (tree == null) {
tree = Ognl.parseExpression(expression);
expressions.putIfAbsent(expression, tree);
}
{code}
every parameter in the request cached in field expressions which is an instances of ConcurrentMap<String, Object>, use parameterName as key. so i construct huge different parameters that has different name (like "abc[123], abc[124]" ), they all cached in expressions, this cause outofmemory error, and let map acted like a list .
was:
in class com.opensymphony.xwork2.ognl.OgnlUtil, code :
tree = expressions.get(expression);
if (tree == null) {
tree = Ognl.parseExpression(expression);
expressions.putIfAbsent(expression, tree);
}
every parameter in the request cached in field expressions which is an instances of ConcurrentMap<String, Object>, use parameterName as key. so i construct huge different parameters that has different name (like "abc[123], abc[124]" ), they all cached in expressions, this cause outofmemory error, and let map acted like a list .
> cache attack at OgnlUtil.expressions
> -------------------------------------
>
> Key: WW-4146
> URL: https://issues.apache.org/jira/browse/WW-4146
> Project: Struts 2
> Issue Type: Bug
> Components: Expression Language
> Affects Versions: 2.3.15.1
> Reporter: bruce liu
> Priority: Critical
>
> in class com.opensymphony.xwork2.ognl.OgnlUtil, code :
> {code:java}
> tree = expressions.get(expression);
> if (tree == null) {
> tree = Ognl.parseExpression(expression);
> expressions.putIfAbsent(expression, tree);
> }
> {code}
> every parameter in the request cached in field expressions which is an instances of ConcurrentMap<String, Object>, use parameterName as key. so i construct huge different parameters that has different name (like "abc[123], abc[124]" ), they all cached in expressions, this cause outofmemory error, and let map acted like a list .
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