CVE-2021-33631 Explained : Impact and Mitigation
Learn about CVE-2021-33631, an Integer Overflow vulnerability in the openEuler kernel affecting Linux filesystem modules. Find out the impact, affected systems, and mitigation steps.
A detailed overview of the Integer Overflow or Wraparound vulnerability in the openEuler kernel impacting Linux filesystem modules.
Understanding CVE-2021-33631
This section provides insight into the impact, technical details, and mitigation strategies related to CVE-2021-33631.
What is CVE-2021-33631?
The CVE-2021-33631 vulnerability involves an Integer Overflow or Wraparound issue in the openEuler kernel on Linux, specifically affecting filesystem modules. It allows for Forced Integer Overflow, leading to potential exploitation.
The Impact of CVE-2021-33631
The impact of CVE-2021-33631 is categorized under CAPEC-92 as a Forced Integer Overflow vulnerability. This can result in a high availability impact, with a CVSS v3.1 base score of 5.5 (Medium Severity).
Technical Details of CVE-2021-33631
This section delves into the vulnerability description, affected systems and versions, as well as the exploitation mechanism.
Vulnerability Description
The vulnerability in the openEuler kernel affects versions ranging from 4.19.90 to 5.10.0-60.18.0, prior to 4.19.90-2401.3 and 5.10.0-183.0.0. It stems from an Integer Overflow or Wraparound weakness in the filesystem modules.
Affected Systems and Versions
Systems running openEuler kernel versions between 4.19.90 to 4.19.90-2401.3, and 5.10.0-60.18.0 to 5.10.0-183.0.0 are vulnerable to exploitation through this issue.
Exploitation Mechanism
The exploitation of CVE-2021-33631 involves leveraging the Integer Overflow vulnerability in the filesystem modules of the openEuler kernel, leading to a forced Integer Overflow situation.
Mitigation and Prevention
This section outlines immediate steps to take, long-term security practices, and the importance of patching and updates.
Immediate Steps to Take
It is recommended to apply the necessary patches provided by openEuler to address the vulnerability and mitigate potential risks.
Long-Term Security Practices
To enhance overall system security, organizations should follow secure coding practices, conduct regular security assessments, and maintain awareness of emerging threats.
Patching and Updates
Regularly update the openEuler kernel to the latest secure versions to ensure that the system is protected from known vulnerabilities.