CVE-2019-19228 : Security Advisory and Response
Learn about CVE-2019-19228 affecting Fronius Solar Inverter devices. Discover the impact, technical details, affected versions, and mitigation steps for this authentication bypass vulnerability.
Fronius Solar Inverter devices prior to version 3.14.1 (HM 1.12.1) are vulnerable to an authentication bypass due to the storage of the today account password in an insecure file.
Understanding CVE-2019-19228
This CVE identifies a security vulnerability in Fronius Solar Inverter devices that allows attackers to circumvent the authentication process.
What is CVE-2019-19228?
Attackers can exploit a vulnerability in Fronius Solar Inverter devices before version 3.14.1 (HM 1.12.1) to bypass authentication by accessing the password stored in /tmp/web_users.conf.
The Impact of CVE-2019-19228
The vulnerability enables unauthorized individuals to gain access to Fronius Solar Inverter devices without proper authentication, potentially leading to unauthorized control or manipulation of the devices.
Technical Details of CVE-2019-19228
Fronius Solar Inverter devices are susceptible to an authentication bypass due to insecure password storage.
Vulnerability Description
The password associated with the today account is stored in the file /tmp/web_users.conf, allowing attackers to retrieve it and bypass the authentication process.
Affected Systems and Versions
- Affected Systems: Fronius Solar Inverter devices
- Vulnerable Versions: Devices prior to version 3.14.1 (HM 1.12.1)
Exploitation Mechanism
Attackers exploit the insecure storage of the today account password in /tmp/web_users.conf to bypass authentication and gain unauthorized access to the devices.
Mitigation and Prevention
To address CVE-2019-19228, users and administrators should take immediate and long-term security measures.
Immediate Steps to Take
- Update Fronius Solar Inverter devices to version 3.14.1 (HM 1.12.1) or newer to mitigate the vulnerability.
- Monitor device logs for any suspicious activity that may indicate unauthorized access.
Long-Term Security Practices
- Implement strong password policies and avoid storing sensitive information in insecure locations.
- Regularly review and update device firmware to address security vulnerabilities.
Patching and Updates
- Apply patches and updates provided by Fronius for the Solar Inverter devices to ensure ongoing protection against security threats.