SB2021042811 - XML External Entity injection in Elastic App Search web crawler
Published: April 28, 2021
Security Bulletin ID
SB2021042811
Severity
Medium
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 security vulnerability.
1) XML External Entity injection (CVE-ID: CVE-2021-22140)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to insufficient validation of user-supplied XML input in Enterprise Search. A remote attacker whose website is being crawled by App Search can craft a malicious sitemap.xml to traverse the filesystem of the host running the instance and obtain sensitive files.
Remediation
Install update from vendor's website.