Description
Server-side request forgery (ssrf) in Azure Compute Gallery allows an authorized attacker to elevate privileges over a network.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-35744
1. Vulnerability Assessment and Severity Evaluation
The vulnerability EUVD-2025-35744, also known as CVE-2025-59503, is a Server-Side Request Forgery (SSRF) in Azure Compute Gallery. This vulnerability allows an authorized attacker to elevate privileges over a network. The CVSS (Common Vulnerability Scoring System) base score of 9.9 indicates a critical severity level. The CVSS vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C provides the following details:
- Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
- Attack Complexity (AC): Low (L) - The attack requires low complexity to execute.
- Privileges Required (PR): Low (L) - The attacker needs low-level privileges to exploit the vulnerability.
- User Interaction (UI): None (N) - No user interaction is required for the attack to succeed.
- Scope (S): Changed (C) - The vulnerability affects a different security scope.
- Confidentiality (C): High (H) - The vulnerability has a high impact on confidentiality.
- Integrity (I): High (H) - The vulnerability has a high impact on integrity.
- Availability (A): High (H) - The vulnerability has a high impact on availability.
- Exploit Code Maturity (E): Unproven (U) - Exploit code is not yet available.
- Remediation Level (RL): Official-Fix (O) - An official fix is available.
- Report Confidence (RC): Confirmed (C) - The vulnerability has been confirmed.
2. Potential Attack Vectors and Exploitation Methods
An attacker with low-level privileges can exploit this SSRF vulnerability by crafting malicious requests that the server processes. These requests can be designed to access internal services, metadata, or other sensitive resources that the server can reach but the attacker cannot directly access. Potential exploitation methods include:
- Internal Network Scanning: The attacker can use the SSRF to scan internal networks and gather information about the infrastructure.
- Data Exfiltration: The attacker can exfiltrate sensitive data by making the server fetch internal resources and return them to the attacker.
- Privilege Escalation: The attacker can use the SSRF to access higher-privileged services or resources, potentially leading to further compromise.
3. Affected Systems and Software Versions
The vulnerability affects the Azure Compute Resource Provider. Specific software versions are not listed, indicating that all versions may be affected until a patch is applied. Organizations using Azure Compute Gallery should assume they are vulnerable unless they have applied the official fix.
4. Recommended Mitigation Strategies
To mitigate this vulnerability, the following strategies are recommended:
- Apply Official Patches: Immediately apply the official fix provided by Microsoft.
- Network Segmentation: Implement strict network segmentation to limit the attack surface.
- Access Controls: Enforce strict access controls and least privilege principles to minimize the risk of low-level privileged users exploiting the vulnerability.
- Monitoring and Logging: Enhance monitoring and logging to detect and respond to any suspicious activities related to SSRF.
- Input Validation: Implement robust input validation and sanitization to prevent malicious requests from being processed.
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 in various sectors, including government, healthcare, and finance. The high severity score and the potential for privilege escalation and data exfiltration make it a critical concern for organizations relying on Azure Compute Gallery. Compliance with regulations such as GDPR may also be affected if sensitive data is compromised.
6. Technical Details for Security Professionals
- Detection: Security professionals should look for unusual network traffic patterns, such as internal network scans or requests to internal services from unexpected sources.
- Response: Incident response teams should be prepared to isolate affected systems, analyze logs for evidence of exploitation, and apply patches as soon as possible.
- Prevention: Implementing a defense-in-depth strategy, including regular security audits, vulnerability assessments, and continuous monitoring, can help prevent similar vulnerabilities from being exploited in the future.
Conclusion
EUVD-2025-35744 is a critical SSRF vulnerability in Azure Compute Gallery that requires immediate attention. Organizations should prioritize applying the official fix and implementing additional security measures to mitigate the risk. The potential impact on confidentiality, integrity, and availability makes this vulnerability a significant concern for the European cybersecurity landscape.