Horizon Alert
Summary of the vulnerability and why it matters
A remote code execution vulnerability exists in Kaltura due to unsafe deserialization of user-controlled data within a specific module. This could allow an unauthenticated remote attacker to execute arbitrary PHP code on the web server.
- Unsafe data handling allows code execution.
- Confirms potential for high-impact remote attacks.
- Assess relevance and exposure of affected systems.
Attack Path
How an attacker could exploit the issue
An attacker can exploit this vulnerability by sending a specially crafted PHP object through a GET request to a specific web endpoint. This bypasses the need for authentication and allows the attacker to execute arbitrary PHP code on the server, potentially leading to a full system compromise.
- No authentication required.
- Unsafe deserialization of user data.
- Arbitrary code execution on server.
Live Threat
Current exploitation, exposure, and threat context
A remote code execution vulnerability exists in Kaltura when processing user-controlled data through the keditorservices module. An unauthenticated attacker could exploit this by sending a specially crafted serialized PHP object in a GET request, potentially leading to the execution of arbitrary PHP code on the web server.
- Arbitrary PHP code execution.
- Exploitable via crafted GET request.
- Compromise of web server process.
Operational Fix
Recommended remediation, mitigation, and detection steps
The Kaltura application owners, along with infrastructure and security teams, are most likely responsible for addressing this remote code execution vulnerability. The first practical step is to locate all instances of the affected Kaltura services, determine their exposure, and confirm ownership before planning remediation.
- Identify affected Kaltura instances.
- Verify business criticality and exposure.
- Plan remediation with owners.
