Remote Code Execution Vulnerability in Apache Solr by Apache
CVE-2019-17558

7.5HIGH

Key Information:

Vendor: Apache
Status: Apache Solr
Vendor: CVE Published:; 30 December 2019

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 97%🦅 CISA Reported

Summary

The vulnerability in Apache Solr presents a significant risk as it allows for Remote Code Execution through the VelocityResponseWriter. This is particularly concerning for configurations where user-defined templates are enabled via the params.resource.loader.enabled setting. When properly configured, an attacker could exploit this flaw by uploading malicious Velocity templates within a configset or by manipulating response parameters. Moreover, while default settings limit exposure, administrators must be cautious when granting access to the configuration API, as exploited instances may lead to unauthorized code execution. Note that the vulnerability is addressed in later versions, specifically Solr 8.4, which mitigated the risk by removing the resource loader entirely for increased security.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply updates per vendor instructions.

Affected Version(s)

Apache Solr Apache Solr 5.0.0 to Apache Solr 8.3.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

Solr_CVE-2019-17558
Created by Ma1Dong

CVE-2019-17558_Solr_Vul_Tool
Created by thelostworldFree

Exploit_CVE-2019-17558-RCE
Created by xkyrage