XXE attack in Elasticsearch



Published: 2018-12-19
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-17247
CWE-ID CWE-611
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Elasticsearch
Web applications / Other software

Vendor Elastic Stack

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) XXE attack

EUVDB-ID: #VU16604

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-17247

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

Description

The vulnerability allows a remote attacker to conduct XXE-attack.

The vulnerability exists in Machine Learning’s find_file_structure API due to improper handling of XML External Entities (XXEs) when parsing an XML file if a policy allowing external network access has been added to Elasticsearch’s Java Security Manager. A remote attacker can trick the victim into opening an XML file that submits malicious input and obtain potentially sensitive information.

Mitigation

Update to version 6.5.2.

Vulnerable software versions

Elasticsearch: 6.5.0 - 6.5.1

CPE2.3 External links

http://www.elastic.co/community/security


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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