CVE-2023-6523 in Extreme XDS
Summary
by MITRE • 04/05/2024
Authorization Bypass Through User-Controlled Key vulnerability in ExtremePacs Extreme XDS allows Authentication Abuse.
This issue affects Extreme XDS: before 3914.
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Analysis
by VulDB Data Team • 05/20/2026
The CVE-2023-6523 vulnerability represents a critical authorization bypass flaw within ExtremePacs Extreme XDS software, specifically impacting versions prior to 3914. This vulnerability falls under the category of authentication abuse and stems from improper handling of user-controlled keys that can be manipulated to circumvent the system's authorization mechanisms. The flaw exists in the way the software processes authentication tokens and key management components, creating a pathway for unauthorized access to protected resources. The vulnerability is particularly concerning because it allows attackers to exploit the system's trust model by leveraging user-controllable input to manipulate the authorization flow, effectively bypassing the intended security controls.
The technical implementation of this vulnerability involves the system's insufficient validation of user-supplied keys or authentication parameters during the authorization process. Attackers can manipulate these parameters to gain access to resources that should be restricted to authorized users only. The flaw typically manifests when the system accepts user input without proper sanitization or validation, allowing malicious inputs to be processed as legitimate authentication tokens. This creates a scenario where an attacker can craft specific key values that will be accepted by the system's authorization logic, thereby enabling unauthorized access to sensitive data, administrative functions, or system resources. The vulnerability is classified under CWE-285 which specifically addresses improper authorization issues, and aligns with ATT&CK technique T1078 for Valid Accounts and T1566 for Phishing, as it can be exploited through credential manipulation and social engineering approaches.
The operational impact of CVE-2023-6523 extends beyond simple unauthorized access, potentially enabling attackers to escalate privileges and gain deeper system control. Organizations using affected Extreme XDS versions face significant risk of data breaches, system compromise, and potential lateral movement within their networks. The vulnerability can be exploited remotely without requiring prior authentication, making it particularly dangerous for networked systems. Depending on the system configuration, attackers may gain access to sensitive operational data, configuration files, or administrative interfaces that control critical network infrastructure. The impact is compounded by the fact that this vulnerability affects the core authentication mechanisms, potentially allowing attackers to impersonate legitimate users or gain access to privileged accounts. Security teams must consider the broader implications for their network security posture, as unauthorized access through this vulnerability could lead to extended compromise and data exfiltration.
Organizations should implement immediate mitigation strategies including upgrading to Extreme XDS version 3914 or later, which contains the necessary patches to address the authorization bypass vulnerability. Network segmentation and monitoring should be enhanced to detect suspicious authentication patterns that might indicate exploitation attempts. Access controls should be reviewed and strengthened, with particular attention to key management processes and authentication token validation. Security configurations should be audited to ensure that user-controllable parameters are properly validated and sanitized before being processed by the authorization system. Additionally, organizations should implement comprehensive logging and monitoring of authentication events to detect potential exploitation attempts. The vulnerability's impact on authentication systems necessitates a layered security approach that includes both preventive measures and detection capabilities to protect against exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify similar issues within the broader network infrastructure, as this type of authorization bypass vulnerability can often indicate deeper security architecture weaknesses that require comprehensive remediation.