CVE-2022-36119 in Blue Prism
Summary
by MITRE • 08/26/2022
An issue was discovered in Blue Prism Enterprise 6.0 through 7.01. In a misconfigured environment that exposes the Blue Prism Application server, it is possible for a domain authenticated user to send a crafted message to the Blue Prism Server and accomplish a remote code execution attack that is possible because of insecure deserialization. Exploitation of this vulnerability allows for code to be executed in the context of the Blue Prism Server service.
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Analysis
by VulDB Data Team • 10/02/2022
The vulnerability identified as CVE-2022-36119 represents a critical security flaw in Blue Prism Enterprise versions 6.0 through 7.01 that stems from insecure deserialization practices within the application server component. This vulnerability specifically manifests when the Blue Prism Application server is improperly configured and exposed to unauthorized network access, creating an attack surface that malicious actors can exploit to gain significant system control. The flaw allows domain-authenticated users to craft and send specially crafted messages to the server, which then triggers the insecure deserialization process. This particular weakness aligns with CWE-502, which categorizes insecure deserialization as a dangerous practice that can lead to remote code execution when deserializing untrusted data without proper validation and sanitization mechanisms.
The technical exploitation of this vulnerability occurs through the manipulation of serialized data structures that the Blue Prism server processes during normal operations. When a crafted message is sent to the server, the insecure deserialization mechanism attempts to reconstruct objects from the malicious input, inadvertently executing arbitrary code within the context of the Blue Prism Server service. This execution context is particularly dangerous because the Blue Prism server typically runs with elevated privileges necessary for its operational functions, potentially allowing attackers to achieve full system compromise. The vulnerability demonstrates how insufficient input validation and lack of proper object deserialization security measures can create pathways for attackers to escalate privileges and execute malicious payloads on targeted systems. The attack vector leverages the existing authentication mechanisms, meaning that only users who can authenticate to the domain are required to initiate the exploit, reducing the barrier to entry for potential attackers.
The operational impact of this vulnerability extends beyond simple remote code execution, as it fundamentally compromises the security posture of organizations using Blue Prism Enterprise solutions. When successfully exploited, attackers can execute arbitrary commands with the privileges of the Blue Prism service account, potentially leading to complete system takeover, data exfiltration, and lateral movement within the network. The vulnerability affects enterprise environments where Blue Prism servers are improperly network-configured, exposing them to external access without proper security controls. Organizations may experience significant disruption to their automated business processes, as the compromised system could be used to manipulate workflows, access sensitive data, or serve as a foothold for broader network infiltration. The attack requires minimal sophistication beyond understanding the deserialization vulnerability pattern, making it particularly dangerous for environments where Blue Prism is deployed without proper network segmentation and access controls.
Mitigation strategies for CVE-2022-36119 should focus on both immediate defensive measures and long-term architectural improvements. Organizations must first ensure that Blue Prism servers are not exposed to unauthorized network access by implementing proper network segmentation and access controls through firewalls and access control lists. The immediate patching of affected Blue Prism Enterprise versions is essential, as vendors typically provide security updates that address the insecure deserialization implementation. Additional protective measures include implementing strict input validation for all deserialization operations, using alternative serialization formats that are less prone to exploitation, and employing application whitelisting to restrict which code can execute on the system. Security monitoring should be enhanced to detect unusual deserialization activity patterns, and regular security assessments should be conducted to identify misconfigurations that could expose similar vulnerabilities. From an ATT&CK framework perspective, this vulnerability maps to techniques involving deserialization attacks and privilege escalation, emphasizing the need for comprehensive security controls that address both the immediate exploit and potential post-exploitation activities. Organizations should also consider implementing principle of least privilege for service accounts and regular security training for administrators to prevent accidental exposure of critical systems.