CVE-2023-4885 is classified as a Man in the Middle vulnerability affecting Open5GS, a framework for developing 5G core network functions. This vulnerability allows an attacker to intercept VNF (Virtual Network Function) communications, thereby risking the exposure of sensitive information. The CVSS base score for this vulnerability is 6.5, indicating a medium severity level that warrants attention from organizations relying on Open5GS for their network infrastructure.
The exploitation of this vulnerability poses significant risks to organizations, particularly those handling sensitive data through their VNF communications. Organizations should prioritize remediation efforts, as the potential for data breaches or unauthorized access could have severe implications.
As of now, there is no confirmed public exploit for this vulnerability, and it has not been included in the Known Exploited Vulnerabilities (KEV) catalog. However, the presence of a proof of concept on GitHub indicates that the vulnerability may be leveraged in the wild.
Organizations using Open5GS should address this vulnerability in their patch cycle to mitigate the associated risks effectively.
Vulnerability Details
The official description of CVE-2023-4885 states that it is a Man in the Middle vulnerability, enabling attackers to intercept communications between VNFs. This could lead to the exposure of confidential data. The primary CVSS score provided by NVD is 5.9, with a secondary score from INCIBE of 6.5. Both scores reflect the medium severity of this vulnerability, which underscores the need for timely remediation by organizations utilizing Open5GS.
The vulnerability falls under the CWE-300 classification, indicating improper enforcement of the principle of least privilege. The attack vector is network-based, with low attack complexity and no privileges or user interaction required to exploit the vulnerability.
The affected product is Open5GS, with vulnerable versions up to 2.4.10. Organizations should monitor their deployments and ensure they are updated to mitigate any potential risks associated with this vulnerability.
Technical Analysis
The root cause of CVE-2023-4885 stems from insufficient protection of VNF communications, which leaves them susceptible to interception by attackers. The attack vector is network-based, meaning that attackers do not need physical access to the network to exploit the vulnerability. The attack complexity is rated as low, indicating that it can be easily exploited without significant technical skill.
Exploitation of this vulnerability requires no privileges, and user interaction is also not necessary. The confidentiality impact is classified as low, while the integrity and availability impacts are rated as none. This indicates that while sensitive information may be exposed, the integrity of the data is not compromised, and services remain available.
Risk & Impact Analysis
Risk to organizations includes potential exposure of sensitive information through intercepted VNF communications. As many organizations utilize VNFs for critical network functions, the implications of this vulnerability could range from data breaches to compliance violations, depending on the nature of the intercepted data. Furthermore, the vulnerability's existence in the Open5GS framework means that any organization relying on this technology could be affected.
The urgency for remediation is classified as medium. Organizations should schedule remediation as part of their regular patch management processes to ensure their systems are not vulnerable to this type of attack. Given the nature of the vulnerability, organizations that process sensitive data should prioritize this update.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects Open5GS versions up to 2.4.10. Organizations should ensure they are using updated versions of Open5GS to mitigate possible risks associated with this vulnerability.
Mitigation & Remediation
Organizations should prioritize patching Open5GS to the latest version to remediate CVE-2023-4885. If a patch is not immediately available, consider implementing configuration hardening measures to limit exposure to potential Man in the Middle attacks. Regular penetration testing can also uncover vulnerabilities before they can be exploited.
For continuous security validation, organizations should engage in continuous penetration testing to identify similar weaknesses.
Detection Guidance
Organizations should monitor logs for unusual network traffic patterns indicative of potential Man in the Middle attacks. Behavioral anomalies such as unexpected communication endpoints should also be investigated. Network signatures related to known attack patterns may assist in early detection.
AppSecure Threat Intelligence Insight
CVE-2023-4885 represents a significant concern for organizations utilizing Open5GS. The growing trend of Man in the Middle vulnerabilities highlights the necessity for robust security frameworks to protect sensitive communications. Organizations should consider implementing comprehensive security assessments to evaluate their exposure, particularly in network environments.
The presence of a proof of concept indicates an increased risk of exploitation. Organizations should familiarize themselves with the latest penetration testing methodologies to enhance their defensive strategies.
Finally, organizations should stay informed about emerging threats and vulnerabilities through resources such as security advisories and threat intelligence platforms.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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