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Elasticsearch 1.3.x CORS Issue

Elasticsearch 1.3.x CORS Issue
Posted Oct 3, 2014
Authored by Jordan Sissel

Elasticsearch versions 1.3.x and prior have a default configuration for CORS that allows an attacker to craft links that could cause a user's browser to send requests to Elasticsearch instances on their local network. These requests could cause data loss or compromise.

tags | advisory, local
advisories | CVE-2014-6439
MD5 | 0f8a57cde7567ce6ca8a60f8edb33116

Elasticsearch 1.3.x CORS Issue

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Summary:
Elasticsearch versions 1.3.x and prior have a default configuration for
CORS that allows an attacker to craft links that could cause a user’s
browser to send requests to Elasticsearch instances on their local network.
These requests could cause data loss or compromise.

We have been assigned CVE-2014-6439 for this issue.


Fixed versions:
Version 1.4.0 beta 1 and later change the default configuration.


Remediation:
Users should either set “http.cors.enabled” to false, or set
“http.cors.allow-origin” to the value of the server that should be allowed
access, such as localhost or a server hosting Kibana. Disabling CORS
entirely with the former setting is more secure, but may not be suitable
for all use cases.

CVSS
Overall CVSS score: 5.3

More information:
http://www.elasticsearch.org/blog/elasticsearch-1-4-0-beta-released/
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