Horizon Alert
Summary of the vulnerability and why it matters
A vulnerability in Apache Camel's Solr component allows attackers to manipulate Solr requests, potentially leading to unauthorized access to internal systems or data modification. This issue arises when the component improperly handles headers from incoming HTTP requests, forwarding them to the Solr server. The main concern is confirming relevance and exposure within our deployed Apache Camel integrations.
- Special characters in data can alter system requests.
- It allows unauthorized access to internal services.
- Confirm if our integrations use this component.
Attack Path
How an attacker could exploit the issue
An attacker could exploit this by sending specially crafted HTTP requests to an Apache Camel application that connects to Apache Solr. If the Camel route is configured to accept unauthenticated HTTP requests and bridge them to a Solr producer, the attacker can inject malicious parameters into the Solr request. This can lead to the Solr server making requests to arbitrary URLs chosen by the attacker, potentially accessing internal services or cloud metadata. Additionally, attackers can inject arbitrary fields into indexed documents.
- Unauthenticated HTTP access required.
- Injecting Solr parameters via HTTP headers.
- Server-side request forgery, data injection.
Live Threat
Current exploitation, exposure, and threat context
When Apache Camel's Solr component improperly handles message headers, an attacker could inject arbitrary Solr request parameters or fields. This could lead to server-side request forgery, allowing requests to be made to an attacker-chosen URL, or the injection of unauthorized fields into indexed Solr documents, when supported by an unauthenticated HTTP bridging consumer.
- Solr request parameters and document fields.
- Injected via HTTP headers in bridging routes.
- Server-side requests or data tampering.
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability likely impacts platform or integration teams responsible for Apache Camel routes that process inbound HTTP requests and forward them to Solr. The immediate first step is to inventory all Camel applications using the Solr component, determine their exposure, and identify the specific routes that bridge HTTP consumers to Solr producers. Once identified, assess the criticality of these routes and their associated Solr instances, then confirm the accountable application or system owner to plan remediation.
- Platform or Integration Teams own the issue.
- Verify Solr integration routes and exposure.
- Plan remediation and coordinate with Solr administrators.
