CVE-2025-5088 in EOS
Summary
by MITRE • 06/05/2026
An authenticated Redis session could be used to obtain full root access to all servers in the CVX cluster. Note that this would require an attacker to have both network access to the Redis service on a CVX server and the Redis password. Please note that all Redis communication, including authentication, occurs over plaintext in the present day. TLS support is tracked under RFE1294850.
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Analysis
by VulDB Data Team • 06/05/2026
This vulnerability represents a critical privilege escalation flaw within CVX cluster environments that leverages insecure Redis configurations to achieve full system compromise. The vulnerability stems from the fundamental design of Redis authentication mechanisms within the CVX ecosystem, where attackers must first establish network connectivity to the Redis service and obtain the corresponding password to exploit this weakness. The plaintext communication nature of Redis operations creates an additional attack surface where credentials and session data can be intercepted during transmission, making this vulnerability particularly dangerous in networked environments where man-in-the-middle attacks are possible.
The technical flaw exploits the trust model inherent in Redis session management where authenticated sessions can be leveraged to gain root privileges across all servers within the CVX cluster. This represents a classic privilege escalation vulnerability that maps to CWE-284 Access Control Issues, specifically manifesting as improper access control within distributed session management systems. The vulnerability's severity is amplified by the fact that Redis authentication occurs over plaintext protocols without encryption, violating security best practices outlined in NIST SP 800-57 and other cryptographic standards. The lack of Transport Layer Security (TLS) support in current implementations, as noted in RFE1294850, demonstrates a fundamental security gap that has persisted despite the availability of secure communication protocols.
The operational impact of this vulnerability extends beyond simple credential theft to encompass complete cluster compromise, allowing attackers to execute arbitrary code with root privileges across all interconnected servers. This type of attack aligns with ATT&CK technique T1078 Valid Accounts, where legitimate credentials are used to gain unauthorized access, and T1566 Phishing, as attackers may need to obtain initial network access through social engineering or other means to reach the Redis service. The vulnerability's exploitation requires both network reconnaissance to identify Redis endpoints and successful authentication to establish the malicious session, creating a two-pronged attack vector that follows the principle of least privilege violation. The plaintext transmission of Redis communications creates a persistent risk that can be exploited by attackers who have gained access to the network segment containing Redis services.
Mitigation strategies must address both the immediate authentication weakness and the fundamental lack of encryption in Redis communications. Organizations should implement mandatory TLS encryption for all Redis connections, which would address the plaintext transmission vulnerability and align with industry standards such as RFC 5246 for TLS protocols. Network segmentation and access control lists should be implemented to restrict Redis service access to only authorized administrative systems. The implementation of additional authentication layers such as OAuth or JWT tokens can provide additional security boundaries beyond simple password authentication. Regular security audits should verify that Redis services are not running with unnecessary privileges and that access controls are properly configured. System administrators should also implement monitoring solutions that can detect unauthorized Redis access attempts and session hijacking activities, providing early warning capabilities for potential exploitation attempts. The vulnerability's persistence across multiple systems within the CVX cluster requires comprehensive remediation efforts that address not just individual Redis instances but the entire distributed session management architecture.