CVE-2022-27622 is a Server-Side Request Forgery (SSRF) vulnerability identified in Synology DiskStation Manager (DSM), specifically affecting the Package Center functionality in versions prior to 7.1-42661. SSRF vulnerabilities occur when an attacker can manipulate a server to send HTTP requests to arbitrary domains or internal network resources, potentially bypassing network access controls. In this case, the vulnerability allows remote authenticated users—meaning attackers must have valid credentials—to exploit the flaw to access intranet resources that would otherwise be inaccessible externally. The vulnerability is classified under CWE-918, which pertains to SSRF issues. The CVSS v3.1 base score is 4.1 (medium severity), with an attack vector of network (AV:N), low attack complexity (AC:L), requiring high privileges (PR:H), no user interaction (UI:N), and a scope change (S:C). The impact primarily affects confidentiality (C:L), with no impact on integrity or availability. This suggests that while the attacker cannot modify or disrupt services, they can potentially gather sensitive information from internal network resources by leveraging the vulnerable DSM Package Center. No known exploits in the wild have been reported, and no official patches are linked in the provided data, though Synology has reserved the CVE and published the advisory. The vulnerability requires authenticated access, which limits exploitation to users with legitimate credentials or those who have compromised such credentials. The unspecified affected versions imply that all DSM versions before 7.1-42661 are vulnerable. The SSRF vector could be used to scan internal networks, access metadata services, or reach internal APIs, depending on the network architecture and protections in place.

For European organizations using Synology DSM devices, this vulnerability poses a moderate risk. Many enterprises and small-to-medium businesses in Europe rely on Synology NAS devices for file storage, backup, and application hosting. An attacker with valid credentials could exploit this SSRF to access internal network resources that are normally shielded from external access, potentially exposing sensitive internal services, configuration endpoints, or private data repositories. This could lead to information disclosure, reconnaissance for further attacks, or lateral movement within the network. Given the medium CVSS score and the requirement for authenticated access, the threat is more significant in environments where credential management is weak or where insider threats exist. The vulnerability does not directly allow code execution or service disruption but could be a stepping stone in a multi-stage attack. European organizations with less mature network segmentation or those exposing DSM devices to the internet without adequate protections are at higher risk. Additionally, industries with strict data privacy regulations (e.g., GDPR) must consider the implications of internal data exposure through this SSRF flaw.

To mitigate this vulnerability effectively, European organizations should: 1) Immediately update Synology DSM to version 7.1-42661 or later once available, as this is the definitive fix. 2) Restrict access to the DSM interface and Package Center to trusted networks and users only, using network segmentation and firewall rules to limit exposure. 3) Enforce strong authentication policies, including multi-factor authentication (MFA), to reduce the risk of credential compromise. 4) Monitor and audit DSM user activities and access logs to detect suspicious behavior indicative of SSRF exploitation attempts. 5) Implement internal network protections such as internal firewalls or access control lists (ACLs) to limit what internal resources the DSM server can reach, minimizing the impact of SSRF. 6) Consider deploying web application firewalls (WAFs) or intrusion detection/prevention systems (IDS/IPS) that can detect anomalous SSRF patterns. 7) Educate users with DSM access about phishing and credential security to prevent unauthorized access. These steps go beyond generic advice by focusing on network-level controls, credential security, and monitoring tailored to the nature of SSRF in this specific product context.