CVE-2021-27351 Explained : Impact and Mitigation
Discover the impact of CVE-2021-27351 on Telegram app. Learn about the vulnerability in session termination, affected versions, exploitation risk, and mitigation steps.
The Terminate Session feature in the Telegram application through 7.2.1 for Android, and through 2.4.7 for Windows and UNIX, fails to invalidate a recently active session.
Understanding CVE-2021-27351
This CVE highlights a vulnerability in the Terminate Session feature of the Telegram application that could lead to active sessions not being properly invalidated.
What is CVE-2021-27351?
The CVE-2021-27351 describes a flaw in the Telegram application for Android, Windows, and UNIX versions where terminating a session fails to invalidate the active session.
The Impact of CVE-2021-27351
If exploited, this vulnerability could allow an attacker to maintain access to a user's session even after it should have been terminated, potentially leading to unauthorized access and data compromise.
Technical Details of CVE-2021-27351
This section covers a detailed analysis of the vulnerability.
Vulnerability Description
The vulnerability lies in the failure of the Telegram application to properly invalidate active sessions when using the Terminate Session feature.
Affected Systems and Versions
The affected systems include Telegram versions up to 7.2.1 for Android and versions up to 2.4.7 for Windows and UNIX operating systems.
Exploitation Mechanism
An attacker could exploit this vulnerability by leveraging the failure to terminate active sessions, allowing them to maintain access to a user's account even after they expect the session to end.
Mitigation and Prevention
Protecting systems from CVE-2021-27351 requires immediate action and long-term security practices.
Immediate Steps to Take
Users are advised to update their Telegram application to the latest version to mitigate the risk of session hijacking through this vulnerability.
Long-Term Security Practices
Employing strong authentication measures and monitoring active sessions regularly can help prevent unauthorized access and maintain overall system security.
Patching and Updates
Regularly updating the Telegram application to the latest version is crucial to ensure that security patches are applied, addressing known vulnerabilities like CVE-2021-27351.