Description
Stack-based buffer overflow in Azure Application Gateway allows an unauthorized attacker to elevate privileges over a network.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-199683
1. Vulnerability Assessment and Severity Evaluation
The vulnerability EUVD-2025-199683, also known as CVE-2025-64657, is a stack-based buffer overflow in the Azure Application Gateway. This vulnerability allows an unauthorized attacker to elevate privileges over a network. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The CVSS vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C breaks down as follows:
- Attack Vector (AV:N): Network, meaning the vulnerability is exploitable remotely.
- Attack Complexity (AC:L): Low, indicating that the attack does not require specialized conditions.
- Privileges Required (PR:N): None, meaning no privileges are required to exploit the vulnerability.
- User Interaction (UI:N): None, indicating that no user interaction is required.
- Scope (S:U): Unchanged, meaning the vulnerability does not affect other systems.
- Confidentiality (C:H): High impact on confidentiality.
- Integrity (I:H): High impact on integrity.
- Availability (A:H): High impact on availability.
- Exploit Code Maturity (E:U): Unproven, meaning no exploit code is available.
- Remediation Level (RL:O): Official-fix, indicating a vendor-supplied patch is available.
- Report Confidence (RC:C): Confirmed, indicating the vulnerability has been confirmed by the vendor.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector for this vulnerability is network-based. An attacker could exploit this vulnerability by sending specially crafted network packets to the Azure Application Gateway. The stack-based buffer overflow could be triggered by:
- Malformed Network Packets: Sending packets designed to overflow the buffer.
- Exploit Kits: Using automated tools that can generate the necessary payloads to exploit the vulnerability.
- Man-in-the-Middle (MitM) Attacks: Intercepting and modifying network traffic to include malicious payloads.
3. Affected Systems and Software Versions
The vulnerability affects the Azure Application Gateway. Specific software versions are not listed (N/A), suggesting that all versions may be vulnerable until patched. Organizations using Azure Application Gateway should assume they are at risk unless they have applied the latest security updates.
4. Recommended Mitigation Strategies
To mitigate the risk associated with this vulnerability, the following strategies are recommended:
- Apply Vendor Patches: Immediately apply the official patch provided by Microsoft.
- Network Segmentation: Implement network segmentation to limit the exposure of the Azure Application Gateway.
- Intrusion Detection Systems (IDS): Deploy IDS to monitor for unusual network traffic patterns that may indicate an exploitation attempt.
- Regular Audits: Conduct regular security audits and vulnerability assessments.
- Access Controls: Implement strict access controls to limit who can interact with the Azure Application Gateway.
5. Impact on European Cybersecurity Landscape
The impact of this vulnerability on the European cybersecurity landscape is significant due to the widespread use of Azure services across various industries. Key concerns include:
- Data Breaches: High risk of data breaches affecting confidentiality, integrity, and availability.
- Compliance Issues: Potential non-compliance with GDPR and other regulatory frameworks due to unauthorized access to sensitive data.
- Operational Disruptions: Possible disruptions in services relying on Azure Application Gateway, affecting business continuity.
6. Technical Details for Security Professionals
For security professionals, the following technical details are crucial:
- Detection: Implement network monitoring tools to detect anomalous traffic patterns indicative of buffer overflow attempts.
- Response: Develop incident response plans specifically tailored to handle buffer overflow exploits.
- Prevention: Ensure that all Azure Application Gateway instances are regularly updated and patched.
- Logging: Enable detailed logging for the Azure Application Gateway to facilitate forensic analysis in case of an attack.
- Training: Conduct regular training sessions for IT staff on identifying and mitigating buffer overflow vulnerabilities.
Conclusion
The stack-based buffer overflow vulnerability in Azure Application Gateway (EUVD-2025-199683) poses a critical risk to organizations using this service. Immediate patching and implementation of robust security measures are essential to mitigate the risk. The European cybersecurity landscape must remain vigilant to prevent potential data breaches and operational disruptions.