CVE-2024-8534
CVE-2024-8534 is a memory safety vulnerability in NetScaler ADC and Gateway that could lead to memory corruption and a potential Denial of Service (DoS). This vulnerability impacts appliances configured as a Gateway (VPN Vserver) with RDP features, those with an RDP Proxy Server Profile set to Gateway, or configured as an Auth Server (AAA Vserver) with RDP features enabled. Given its potential for memory corruption, successful exploitation could destabilize the system, leading to service interruptions. With a SOCRadar Vulnerability Risk Score (SVRS) of 30, the risk isn't critical but still represents a notable threat that should be monitored and mitigated appropriately. Despite a CVSS score of 0, the SVRS indicates that while not immediately critical, the context of the vulnerability (e.g., its presence "In The Wild") should be considered. Organizations using affected NetScaler configurations must address this vulnerability to prevent potential disruptions. This vulnerability highlights the importance of regular security updates and vigilant system monitoring.
Description
CVE-2024-8534 is a memory safety vulnerability affecting NetScaler ADC and Gateway appliances. It arises from a flaw in the handling of user input, potentially leading to memory corruption and Denial of Service (DoS) conditions. This vulnerability becomes exploitable under specific configurations:
- When the appliance acts as a Gateway (VPN Vserver) with the RDP feature enabled.
- When the appliance functions as a Gateway (VPN Vserver) and an RDP Proxy Server Profile is created and assigned to the Gateway (VPN Vserver).
- When the appliance operates as an Auth Server (AAA Vserver) with the RDP feature activated.
Key Insights
- Severity: While the CVSS score is currently 0, the SVRS score is 0, signifying a potential critical vulnerability. This discrepancy is because the SVRS considers factors beyond quantitative metrics, including threat actor activity and potential for exploitation.
- Exploitation Potential: Although there is no current information about active exploits, the vulnerability's nature suggests a potential for remote code execution attacks. Attackers could exploit this flaw to gain unauthorized access to affected systems.
- Configuration Dependency: Exploitation requires specific configurations involving the RDP feature and Gateway/Auth Server roles. Organizations using NetScaler appliances in these configurations are at higher risk.
- Potential Impact: Successful exploitation could lead to a Denial of Service attack, disrupting network operations. In the worst-case scenario, it could enable attackers to gain control of the affected NetScaler appliance, compromising sensitive data and network security.
Mitigation Strategies
- Disable RDP Features: If possible, disable the RDP feature on NetScaler appliances configured as Gateways or Auth Servers. This directly eliminates the vulnerability's attack surface.
- Patching: Apply the latest security patches and updates provided by Citrix, the vendor of NetScaler appliances, to address the vulnerability.
- Network Segmentation: Implement network segmentation to isolate NetScaler appliances from critical systems, limiting the potential impact of a successful attack.
- Intrusion Detection and Prevention: Deploy Intrusion Detection and Prevention Systems (IDS/IPS) to monitor network traffic for suspicious activity associated with the vulnerability.
Additional Information
If users have additional queries regarding this incident, they can use the 'Ask to Analyst' feature, contact SOCRadar directly, or open a support ticket for more information if necessary.
Indicators of Compromise
Exploits
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Social Media
Affected Software
References
CWE Details
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