CVE-2022-27507 in ADC
Summary
by MITRE • 01/26/2023
Authenticated denial of service
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Analysis
by VulDB Data Team • 07/07/2026
An authenticated denial of service vulnerability represents a critical security weakness where an attacker with valid credentials can disrupt or disable system services, applications, or network resources. This type of vulnerability operates under the premise that legitimate users possess sufficient privileges to cause harm, making it particularly dangerous as it bypasses many traditional access control mechanisms. The flaw typically exists in authentication systems, session management protocols, or service handling logic where proper validation and resource allocation controls are insufficient. Such vulnerabilities fall under the CWE-400 category, specifically addressing "Uncontrolled Resource Consumption" within the broader context of denial of service attacks.
The technical implementation of authenticated denial of service often manifests through several vectors including but not limited to memory exhaustion via crafted requests, infinite loop conditions in processing logic, or resource allocation failures during legitimate user sessions. Attackers exploit these weaknesses by leveraging their authenticated access to consume excessive system resources such as CPU cycles, memory allocations, or file descriptors. The vulnerability may stem from inadequate input validation, improper error handling, or flawed state management within the application or system components. When successful, this attack results in complete service unavailability for legitimate users while maintaining the attacker's authenticated access privileges.
The operational impact of authenticated denial of service vulnerabilities extends beyond simple service disruption to encompass broader business continuity concerns and potential financial losses. Organizations may experience extended downtime, degraded performance for authorized users, and increased operational costs associated with incident response and system recovery. These attacks are particularly concerning in enterprise environments where authenticated access is common and legitimate users require continuous access to critical systems. The vulnerability can be exploited through various attack vectors including web applications, network protocols, database systems, or operating system services. According to the ATT&CK framework, this represents a technique within the privilege escalation and denial of service categories, demonstrating how attackers can leverage existing permissions to cause maximum disruption.
Mitigation strategies for authenticated denial of service vulnerabilities encompass multiple layers of defense including proper input validation, resource monitoring, and implementation of rate limiting mechanisms. Organizations should implement comprehensive logging and alerting systems to detect unusual resource consumption patterns during authenticated sessions. Regular security assessments and penetration testing help identify potential exploitation vectors before they can be leveraged by malicious actors. The implementation of proper session management protocols, including timeout mechanisms and resource cleanup procedures, significantly reduces the attack surface. Additionally, employing application firewalls, implementing circuit breaker patterns, and establishing baseline performance metrics enable early detection of anomalous behavior that may indicate an active denial of service attack.
Security controls should address both preventive measures and detection capabilities to effectively counter authenticated denial of service threats. System administrators must configure appropriate resource limits and implement monitoring solutions that track connection counts, memory usage, and processing time for authenticated sessions. Regular updates and patch management programs ensure that known vulnerabilities in authentication systems are addressed promptly. The integration of security orchestration platforms can automate response procedures when resource consumption thresholds are exceeded, providing immediate mitigation while alerting security teams to potential attacks. Organizations should also consider implementing zero trust principles where even authenticated users face continuous verification and monitoring to prevent abuse of legitimate access privileges.
The remediation process requires careful analysis of system logs and network traffic patterns to identify the specific exploitation methods used by attackers. Security teams must understand how their applications handle authenticated sessions and implement proper resource management practices throughout the software development lifecycle. This includes establishing secure coding guidelines that address potential resource consumption issues, conducting regular code reviews focused on authentication and session handling components, and implementing comprehensive testing procedures that simulate high-load scenarios with authenticated users. The integration of automated security scanning tools during development cycles helps identify potential denial of service vulnerabilities before they reach production environments, reducing the likelihood of successful exploitation by malicious actors.