Horizon Alert
Summary of the vulnerability and why it matters
A vulnerability in Apache Struts software could allow an attacker to upload malicious files and potentially execute arbitrary code on affected systems. This issue stems from flaws in how the software handles file uploads, creating a path for unauthorized code execution under certain conditions. The main concern is confirming relevance and exposure within our environments.
- Flaw in file upload logic.
- Widespread use of Apache Struts.
- Confirm if Apache Struts is in use.
Attack Path
How an attacker could exploit the issue
An attacker could begin by interacting with a web application using a vulnerable version of Apache Struts. By specially crafting parameters related to file uploads, they may trick the application into allowing directory traversal. In certain situations, this could permit the attacker to upload a malicious file, which, if executed, could lead to remote code execution.
- Requires network access and no privileges.
- Manipulate file upload parameters.
- Remote code execution.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow an attacker to upload a malicious file by manipulating file upload parameters, potentially leading to remote code execution on systems using affected Apache Struts versions with the old file upload logic.
- System files and application integrity.
- Via manipulated file upload requests.
- Remote code execution could occur.
Operational Fix
Recommended remediation, mitigation, and detection steps
Infrastructure and platform teams are typically responsible for managing Apache Struts deployments. The immediate priority is to identify all instances of the affected technology, determine their exposure and criticality, and then assign ownership for remediation planning.
- Identify application owners and affected instances.
- Verify file upload interceptor usage and exposure.
- Plan remediation or mitigation based on risk.
