CVE-2020-1758 : Security Advisory and Response
Keycloak versions before 10.0.0 are vulnerable to a flaw allowing man-in-the-middle attacks due to lack of TLS hostname verification. Learn about the impact, technical details, and mitigation steps.
A flaw in Keycloak versions before 10.0.0 could allow attackers to perform a man-in-the-middle attack, as it lacks TLS hostname verification when sending emails via the SMTP server.
Understanding CVE-2020-1758
Keycloak, a product by Red Hat, is impacted by a vulnerability that poses medium severity.
What is CVE-2020-1758?
Keycloak versions prior to 10.0.0 are vulnerable to a lack of TLS hostname verification during email transmission using the SMTP server, potentially enabling a man-in-the-middle attack.
The Impact of CVE-2020-1758
The vulnerability scores a base severity of MEDIUM with a CVSS base score of 5.3. It poses a high confidentiality impact but no availability or integrity impact.
Technical Details of CVE-2020-1758
Keycloak's vulnerability in detail.
Vulnerability Description
The flaw in Keycloak versions before 10.0.0 allows for MITM attacks due to the absence of TLS hostname verification in SMTP email sending.
Affected Systems and Versions
- Product: Keycloak
- Vendor: Red Hat
- Affected Versions: Keycloak versions before 10.0.0
Exploitation Mechanism
The vulnerability can be exploited by attackers to intercept communications between the Keycloak instance and the SMTP server.
Mitigation and Prevention
Recommended steps to address CVE-2020-1758
Immediate Steps to Take
- Upgrade Keycloak to version 10.0.0 or later to mitigate the vulnerability.
- Implement proper TLS hostname verification for SMTP communication.
Long-Term Security Practices
- Regularly update and patch Keycloak to the latest versions to prevent security incidents.
Patching and Updates
- Stay informed about security patches and updates released by Red Hat to address CVE-2020-1758.