CVE-2019-0192 Scanner

Apache Solr is a highly scalable search platform widely used for full-text indexing and search across large volumes of data. It is employed by enterprises, e-commerce sites, and web applications requiring real-time search and data analysis capabilities. Solr supports various search capabilities, including faceting and filtering, and is often deployed within enterprise environments. It allows for customizable indexing and retrieval and is favored for its integration with Apache Lucene. With its robust features, Apache Solr remains a popular choice for developers and data analysts.

This vulnerability in Apache Solr enables attackers to perform remote code execution via deserialization of untrusted data. By manipulating the Solr configuration with a crafted HTTP POST request, attackers can direct Solr to connect to a malicious RMI server. This process exposes Solr to unsafe deserialization, which, if exploited, could allow unauthorized code execution. This flaw significantly risks the integrity of systems running vulnerable versions of Solr.

The vulnerability is found in the Apache Solr configuration API, specifically when interacting with the JMX server configuration via an HTTP POST request. Attackers can modify the jmx.serviceUrl parameter to point to a malicious RMI server, triggering deserialization of untrusted data. The attack is facilitated by bypassing standard input validation mechanisms, allowing interaction with the RMI server. When the server responds, deserialization occurs on the Solr side, resulting in potential remote code execution. The endpoint /solr/{core_name}/config is particularly susceptible, with the core name being extracted from the Solr admin cores endpoint.

If exploited, this vulnerability may allow attackers to execute arbitrary code on the server running Apache Solr, which could lead to complete control over the system. It could be used to install malware, extract sensitive data, or disrupt service availability. This vulnerability could also be exploited to gain further access to the network, posing broader security risks to the organization's infrastructure. The consequences may include significant operational disruptions and reputational damage if sensitive data is compromised.

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References:

• https://github.com/Imanfeng/Apache-Solr-RCE
• https://nvd.nist.gov/vuln/detail/CVE-2019-0192