CVE-2017-8126 in UMA
Summary
by MITRE
The UMA product with software V200R001 has a privilege elevation vulnerability due to insufficient validation or improper processing of parameters. An attacker could craft specific packets to exploit these vulnerabilities to gain elevated privileges.
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Analysis
by VulDB Data Team • 01/11/2023
The vulnerability identified as CVE-2017-8126 affects the UMA product version V200R001 and represents a critical privilege escalation flaw that stems from inadequate parameter validation mechanisms within the software architecture. This weakness creates an exploitable condition where malicious actors can manipulate input parameters to bypass normal access controls and elevate their privileges within the system. The vulnerability resides in the product's insufficient validation or improper processing of parameters, which serves as the primary attack vector for unauthorized privilege escalation. According to CWE classification, this vulnerability maps to CWE-20, which encompasses improper input validation, a fundamental security weakness that enables various attack patterns including privilege escalation and command injection. The UMA product's failure to properly validate or process incoming parameters creates a pathway for attackers to craft specially crafted packets that exploit the underlying system weaknesses. This issue directly impacts the principle of least privilege by allowing attackers to escalate their access rights from standard user level to administrative privileges without proper authentication or authorization.
The technical exploitation of this vulnerability involves crafting specific network packets that manipulate the parameter processing logic within the UMA software. Attackers can leverage this flaw to bypass authentication mechanisms and gain unauthorized access to elevated system functions that should only be available to privileged users. The improper parameter handling creates a condition where user-supplied data is not adequately sanitized or validated before being processed by the system's core functions. This allows malicious input to be interpreted as legitimate commands or access requests, effectively circumventing the normal security controls that should prevent privilege escalation. The vulnerability's impact extends beyond simple access control bypass as it can potentially enable attackers to execute arbitrary code, modify system configurations, or access sensitive data that would normally be restricted. From an operational perspective, this vulnerability represents a significant risk to system integrity and confidentiality, as successful exploitation can result in complete system compromise and unauthorized administrative control.
The operational impact of CVE-2017-8126 is substantial given that it allows attackers to achieve privilege escalation without requiring prior authentication credentials. This vulnerability can be exploited remotely through network-based attacks, making it particularly dangerous in environments where network access is not properly restricted. The attack surface is broad as it can affect any system running the vulnerable UMA product version, potentially impacting network infrastructure, authentication systems, and related security services. Organizations using this product may face unauthorized access to critical system functions, data breaches, and potential lateral movement within their network infrastructure. The vulnerability's exploitation aligns with ATT&CK technique T1068, which describes the use of local privilege escalation techniques, and T1566, which encompasses social engineering and initial access methods that can be leveraged to exploit such weaknesses. Security professionals should consider this vulnerability in their threat modeling exercises and assess their network architecture for potential attack vectors that could be exploited through this privilege escalation flaw.
Mitigation strategies for CVE-2017-8126 should include immediate deployment of vendor-provided patches or updates that address the parameter validation issues within the UMA product. Organizations should implement network segmentation and access controls to limit exposure to the vulnerable system and reduce the potential attack surface. Regular security assessments and penetration testing should be conducted to identify similar parameter validation weaknesses in other network components. Network monitoring solutions should be configured to detect anomalous packet patterns that may indicate exploitation attempts. System administrators should review and tighten access controls, implement proper input sanitization measures, and ensure that all network services properly validate user input before processing. Additionally, implementing principle of least privilege configurations and regular security audits can help reduce the impact of such vulnerabilities. The remediation process should also include updating network security policies to address the specific threat vectors associated with parameter manipulation and privilege escalation attacks. Organizations should also consider implementing intrusion detection systems that can identify and alert on suspicious network traffic patterns consistent with exploitation attempts targeting this vulnerability.