CVE-2021-21326 Explained : Impact and Mitigation
Learn about CVE-2021-21326 affecting GLPI versions earlier than 9.5.4. Understand the impact, technical details, and mitigation steps to prevent unauthorized ticket creation by unprivileged users.
This vulnerability in GLPI version prior to 9.5.4 allows unauthorized users to create tickets for other users using the self-service interface without proper permission delegation. It has a CVSS base score of 7.7, indicating a high severity level.
Understanding CVE-2021-21326
This CVE describes a horizontal privilege escalation vulnerability in GLPI software.
What is CVE-2021-21326?
CVE-2021-21326, also known as Horizontal Privilege Escalation, affects GLPI versions prior to 9.5.4. It allows attackers to create tickets on behalf of other users without the necessary permissions.
The Impact of CVE-2021-21326
The vulnerability poses a high risk as it enables unauthorized users to perform actions that should be restricted, potentially leading to unauthorized access and misuse of the system.
Technical Details of CVE-2021-21326
This section provides more detailed technical information about the vulnerability.
Vulnerability Description
GLPI version before 9.5.4 allows the creation of tickets for other users through the self-service interface without proper authorization.
Affected Systems and Versions
Systems running GLPI versions earlier than 9.5.4 are vulnerable to this privilege escalation issue.
Exploitation Mechanism
Attackers can exploit this vulnerability by manipulating the self-service interface to create tickets for users without the required permissions.
Mitigation and Prevention
To secure systems from CVE-2021-21326, immediate actions and long-term security practices are recommended.
Immediate Steps to Take
- Upgrade GLPI to version 9.5.4 or later to mitigate the vulnerability.
- Restrict access to the self-service interface to authorized users only.
Long-Term Security Practices
- Regularly update software and apply patches promptly to address security flaws.
- Conduct security training for users to raise awareness of best practices and potential threats.
Patching and Updates
Ensure timely installation of software updates and patches to safeguard against known vulnerabilities.