CVE-2023-0090 in Enterprise Protection
Summary
by MITRE • 03/08/2023
The webservices in Proofpoint Enterprise Protection (PPS/POD) contain a vulnerability that allows for an anonymous user to execute remote code through 'eval injection'. Exploitation requires network access to the webservices API, but such access is a non-standard configuration. This affects all versions 8.20.0 and below.
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Analysis
by VulDB Data Team • 03/08/2023
The vulnerability identified as CVE-2023-0090 resides within the webservices component of Proofpoint Enterprise Protection systems, specifically affecting versions 8.20.0 and earlier. This represents a critical security flaw that enables unauthorized remote code execution through eval injection techniques, fundamentally compromising the integrity and confidentiality of protected environments. The vulnerability manifests in the web service API endpoints that handle user requests, creating a pathway for malicious actors to inject and execute arbitrary code without proper authentication.
The technical implementation of this vulnerability stems from improper input validation and sanitization within the web service framework. When the system processes API requests containing specially crafted payloads, it fails to adequately filter or escape user-supplied data before executing code segments. This eval injection vulnerability directly maps to CWE-94, which describes the weakness of executing arbitrary code or commands, and aligns with ATT&CK technique T1059.007 for command and scripting interpreter. The flaw essentially allows an attacker to bypass authentication mechanisms and directly manipulate the underlying execution environment through crafted API calls.
Operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with complete control over the affected system. Once exploited, adversaries can execute arbitrary commands, install malware, modify system configurations, and potentially escalate privileges to gain administrative control. The remote code execution capability means that attackers can operate from any location with network access to the vulnerable API endpoints, making this vulnerability particularly dangerous for organizations that maintain exposed web services. The non-standard configuration requirement for network access to the webservices API does not eliminate the threat, as many organizations may inadvertently expose these endpoints during deployment or configuration management processes.
Mitigation strategies for CVE-2023-0090 require immediate action from affected organizations to address the root cause through proper input validation and code sanitization. System administrators should implement network segmentation to restrict access to web service API endpoints, ensuring that only authorized networks and IP addresses can reach these vulnerable interfaces. The most effective remediation involves upgrading to Proofpoint Enterprise Protection versions that have addressed this vulnerability, as newer releases contain proper input sanitization and validation mechanisms. Additionally, organizations should deploy web application firewalls to monitor and filter suspicious API requests, implement comprehensive logging and monitoring for unusual API activity, and conduct regular security assessments to identify and remediate similar vulnerabilities. The remediation process should also include reviewing and hardening network configurations to eliminate unnecessary exposure of web service endpoints to external networks, following the principle of least privilege and network segmentation best practices.