CVE-2020-27650 : What You Need to Know

Synology DiskStation Manager (DSM) before 6.2.3-25426-2 is susceptible to a session cookie vulnerability that could be exploited by remote attackers.

Understanding CVE-2020-27650

This CVE involves a security issue in Synology DiskStation Manager (DSM) versions prior to 6.2.3-25426-2, impacting the handling of session cookies in HTTPS connections.

What is CVE-2020-27650?

CVE-2020-27650 refers to the failure of Synology DSM to set the Secure flag for the session cookie during HTTPS sessions, potentially enabling attackers to intercept the cookie transmission in HTTP sessions.

The Impact of CVE-2020-27650

The vulnerability's impact is rated as MEDIUM severity with a CVSS base score of 5.8. Attackers can exploit this flaw to capture session cookies, compromising user sessions and potentially leading to unauthorized access.

Technical Details of CVE-2020-27650

This section delves into the specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability lies in the failure to set the Secure flag for session cookies in HTTPS sessions, making it easier for attackers to intercept and capture these cookies.

Affected Systems and Versions

Product: DiskStation Manager (DSM)
Vendor: Synology
Versions Affected: < 6.2.3-25426-2 (unspecified/custom)

Exploitation Mechanism

Attack Complexity: HIGH
Attack Vector: NETWORK
Privileges Required: NONE
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality, Integrity, and Availability Impact: LOW

Mitigation and Prevention

To address CVE-2020-27650 and enhance system security, follow these mitigation strategies:

Immediate Steps to Take

Update Synology DSM to version 6.2.3-25426-2 or later.
Monitor network traffic for any suspicious activity.
Implement HTTPS across all connections to encrypt data.

Long-Term Security Practices

Regularly review and update security configurations.
Conduct security training for users on safe browsing practices.
Employ network intrusion detection systems to identify potential threats.

Patching and Updates

Apply security patches promptly to address known vulnerabilities.