Apache Solr: Execute Arbitrary Code/Commands -- Remote with User Interaction

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.2723
   CVE-2016-6809: Java code execution for serialized objects embedded in
               MATLAB files parsed by Apache Solr using Tika
                              27 October 2017

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Apache Solr
Publisher:         Apache
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-6809  

Original Bulletin: 
   http://lucene.472066.n3.nabble.com/CVE-2016-6809-Java-code-execution-for-serialized-objects-embedded-in-MATLAB-files-parsed-by-Apache-Sa-td4360650.html

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

Severity: Important

Vendor:
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

Description:

Apache Solr uses Apache Tika for parsing binary file types such as
doc, xls, pdf etc. Apache Tika wraps the jmatio parser
(https://github.com/gradusnikov/jmatio) 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
http://mail-archives.apache.org/mod_mbox/tika-user/201611.mbox/%3C2125912914.1308916.1478787314903%40mail.yahoo.com%3E

Mitigation:
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.

References:
https://issues.apache.org/jira/browse/SOLR-11486
https://issues.apache.org/jira/browse/SOLR-10335
https://wiki.apache.org/solr/SolrSecurity

- -- 
Regards,
Shalin Shekhar Mangar.

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