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Apache Sling 2.1.0 Denial Of Service

Apache Sling 2.1.0 Denial Of Service
Posted Jul 6, 2012
Authored by IO Active | Site sling.apache.org

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.

tags | exploit, denial of service
advisories | CVE-2012-2138
SHA-256 | 8995843141b2cea69c3716091acf10088f9d4eadff4f7ee2520234cfcb689c33

Apache Sling 2.1.0 Denial Of Service

Change Mirror Download
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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