CVE-2019-11820 : What You Need to Know

Local users can gain access to credentials in Synology Calendar before version 2.3.3-0620 due to a vulnerability in the process environment, thereby exposing information. This can be achieved by using the cmdline.

Understanding CVE-2019-11820

This CVE involves a vulnerability in Synology Calendar that allows local users to obtain credentials through a process environment issue.

What is CVE-2019-11820?

CVE-2019-11820 is a security vulnerability in Synology Calendar that enables local users to access credentials before version 2.3.3-0620, potentially leading to information exposure.

The Impact of CVE-2019-11820

The vulnerability poses a medium severity risk with a CVSS base score of 5.5. It allows local users to gain unauthorized access to sensitive information, particularly high impact on confidentiality.

Technical Details of CVE-2019-11820

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability in Synology Calendar before version 2.3.3-0620 allows local users to exploit the process environment to access credentials using the cmdline.

Affected Systems and Versions

Product: Calendar
Vendor: Synology
Versions Affected: Less than 2.3.3-0620 (unspecified version type)

Exploitation Mechanism

Attack Vector: Local
Privileges Required: High
User Interaction: Required
Scope: Changed
Attack Complexity: Low
Confidentiality Impact: High
Integrity Impact: None
Availability Impact: None

Mitigation and Prevention

Protecting systems from CVE-2019-11820 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Synology Calendar to version 2.3.3-0620 or higher to mitigate the vulnerability.
Monitor and restrict local user access to sensitive information.

Long-Term Security Practices

Implement the principle of least privilege to limit user access rights.
Regularly review and update security configurations to prevent similar vulnerabilities.

Patching and Updates

Stay informed about security advisories from Synology and apply patches promptly to address known vulnerabilities.