SB2018121901 - XXE attack in Elasticsearch
Published: December 19, 2018
Security Bulletin ID
SB2018121901
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) XXE attack (CVE-ID: CVE-2018-17247)
CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
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.
Remediation
Install update from vendor's website.