CVE-2016-6809: Java code execution for serialized objects embedded in
MATLAB files parsed by Apache Solr using Tika

Severity: Important

The Apache Software Foundation

Versions Affected:
Solr 5.0.0 to 5.5.4
Solr 6.0.0 to 6.6.1
Solr 7.0.0 to 7.0.1


Apache Solr uses Apache Tika for parsing binary file types such as
doc, xls, pdf etc. Apache Tika wraps the jmatio parser
( to handle MATLAB files. The
parser uses native deserialization on serialized Java objects embedded
in MATLAB files. A malicious user could inject arbitrary code into a
MATLAB file that would be executed when the object is deserialized.

This vulnerability was originally described at

Users are advised to upgrade to either Solr 5.5.5 or Solr 6.6.2 or Solr 7.1.0
releases which have fixed this vulnerability.

Solr 5.5.5 upgrades the jmatio parser to v1.2 and disables the Java
deserialisation support to protect against this vulnerability.

Solr 6.6.2 and Solr 7.1.0 have upgraded the bundled Tika to v1.16.

Once upgrade is complete, no other steps are required.


Shalin Shekhar Mangar.