CVE-2019-20373 : Security Advisory and Response
Learn about CVE-2019-20373, a vulnerability in LTSP LDM version 2.18.06 allowing fat-client root access due to an empty LDM_USERNAME variable. Find mitigation steps and prevention measures here.
LTSP LDM version 2.18.06 has a vulnerability that allows fat-client root access due to an empty value in the LDM_USERNAME variable. This issue arises when the user's shell does not support Bourne shell syntax.
Understanding CVE-2019-20373
This CVE involves a vulnerability in LTSP LDM version 2.18.06 that can lead to fat-client root access.
What is CVE-2019-20373?
CVE-2019-20373 is a security vulnerability in LTSP LDM version 2.18.06 that allows fat-client root access by potentially having an empty value in the LDM_USERNAME variable.
The Impact of CVE-2019-20373
The vulnerability in CVE-2019-20373 can result in unauthorized fat-client root access, posing a significant security risk to affected systems.
Technical Details of CVE-2019-20373
This section provides technical details about the vulnerability.
Vulnerability Description
The vulnerability in LTSP LDM version 2.18.06 allows fat-client root access due to the LDM_USERNAME variable potentially having an empty value when the user's shell lacks Bourne shell syntax support. It is associated with a run-x-session script.
Affected Systems and Versions
- Product: n/a
- Vendor: n/a
- Version: 2.18.06 (affected)
Exploitation Mechanism
The vulnerability can be exploited by manipulating the LDM_USERNAME variable to gain unauthorized root access on fat clients.
Mitigation and Prevention
Protecting systems from CVE-2019-20373 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply the security update provided by LTSP to patch the vulnerability.
- Monitor system logs for any suspicious activities indicating exploitation of the vulnerability.
Long-Term Security Practices
- Regularly update and patch all software components to prevent known vulnerabilities.
- Implement strong access controls and user permissions to limit unauthorized access.
Patching and Updates
Ensure that all systems running LTSP LDM version 2.18.06 are updated with the latest security patches to mitigate the CVE-2019-20373 vulnerability.