full-disclosure - [SECURITY] CVE-2012-2138 Apache Sling denial of service vulnerability

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Date: Fri, 6 Jul 2012 11:12:34 +0200
From: Bertrand Delacretaz <bdelacretaz@...che.org>
To: users <users@...ng.apache.org>, dev <dev@...ng.apache.org>,
	security@...che.org, 
	full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com, 
	announce@...che.org, security@...ng.apache.org
Subject: [SECURITY] CVE-2012-2138 Apache Sling denial of
	service vulnerability

CVE-2012-2138 : Apache Sling denial of service vulnerability

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected:
org.apache.sling.servlets.post bundle up to 2.1.0

Description:
The @CopyFrom operation of the Sling POST servlet allows for copying a
parent node to one of its descendant nodes, creating an infinite loop
that ultimately results in denial of service, once memory and/or
storage resources are exhausted.

Mitigation:
Users should upgrade to version 2.1.2 of the
org.apache.sling.servlets.post bundle [1], or apply the Sling patch of
revision 1352865 [2].

Example:
curl -u admin:pwd -d "" "http://localhost:8888/content/foo/?./%40CopyFrom=../"

Credit:
This issue was discovered by IO Active, working for Adobe.

References:
[1] http://sling.apache.org/site/downloads.cgi
[2] http://svn.apache.org/viewvc?view=revision&revision=1352865
https://issues.apache.org/jira/browse/SLING-2517

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