Horizon Alert
Summary of the vulnerability and why it matters
A vulnerability in the dotCMS ContentResource API could allow unauthenticated attackers to upload executable files. This occurs when a crafted multipart form request bypasses filename sanitization, leading to directory traversal. If anonymous content creation is enabled, this flaw can result in remote code execution.
- Vulnerable ContentResource API
- Unsanitized filename allows traversal
- Remote code execution impact
Attack Path
How an attacker could exploit the issue
An attacker can exploit a vulnerability in the ContentResource API to upload an executable file. This occurs when a specially crafted multipart form request bypasses filename sanitization, allowing the file to be saved outside its intended directory. If anonymous content creation is enabled, this can lead to remote code execution.
- Requires exposed API and anonymous content creation.
- Attacker crafts a request with a malicious filename.
- Results in unauthorized file upload and code execution.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability allows an unauthenticated attacker to upload malicious files, such as executable code, to the system. This could lead to a complete compromise of the affected systems, resulting in significant business risk. The ease of exploitation and potential for remote code execution necessitate prompt attention.
- Likely attacker skill level: Low.
- Required access or conditions: Unauthenticated access, if anonymous content creation is enabled.
- Business risk or urgency: High; remote code execution possible.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
The identified vulnerability in the ContentResource API allows unauthenticated attackers to upload executable files, potentially leading to remote code execution if anonymous content creation is enabled. This impacts organizations using specific versions of dotCMS by introducing a significant business risk. Immediate steps should focus on identifying and mitigating the exposure of affected systems.
- Find dotCMS assets.
- Restrict anonymous content uploads.
- Apply vendor fix and verify.
- Monitor for related activity.
