Horizon Alert
Summary of the vulnerability and why it matters
This vulnerability affects web content management software, specifically its media upload feature. It allows authenticated administrators to upload malicious files, potentially leading to unauthorized command execution on the server. The main concern is confirming relevance and exposure.
- Malicious file uploads bypass security checks.
- Administrators can be tricked into uploading harmful files.
- Confirm if your organization uses this software.
Attack Path
How an attacker could exploit the issue
An attacker with administrator access to Vvveb could upload a malicious PHP file disguised as a GIF. This file would bypass security checks due to a misconfiguration in how the system handles file extensions, allowing the attacker to execute arbitrary commands on the server.
- Requires administrator access.
- Bypasses file upload restrictions.
- Allows arbitrary command execution.
Live Threat
Current exploitation, exposure, and threat context
Authenticated administrators could upload executable PHP files, potentially allowing for the execution of arbitrary operating system commands. This could occur when the application's media upload functionality fails to properly validate file types, permitting a disguised .phar file to be processed. The primary risk is the execution of unauthorized commands on the server.
- Arbitrary code execution on server.
- Uploading malicious .phar files.
- System compromise or data breach.
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability in Vvveb allows authenticated administrators to upload and execute arbitrary PHP code. Initial response should focus on discovering all instances of Vvveb within the environment, assessing their exposure and business criticality, and identifying the specific application or platform owners responsible for remediation. Once these steps are completed, a risk-based remediation plan, potentially involving vendor coordination or temporary mitigations, can be developed.
- Application owners should lead remediation efforts.
- Verify all Vvveb instances and their exposure.
- Plan and coordinate necessary updates or controls.
