CVE-2021-46705 : What You Need to Know
Learn about CVE-2021-46705, a vulnerability in grub2-once in SUSE Linux Enterprise Server 15 SP4 and openSUSE Factory allowing local attackers to manipulate files. Explore the impact, technical details, and mitigation steps.
A vulnerability in grub2-once in SUSE Linux Enterprise Server 15 SP4 and openSUSE Factory allows local attackers to manipulate files. Here's what you should know about CVE-2021-46705.
Understanding CVE-2021-46705
CVE-2021-46705, titled 'grub2-once uses fixed file name in /var/tmp,' presents a security risk in SUSE Linux Enterprise Server 15 SP4 and openSUSE Factory due to insecure temporary file handling.
What is CVE-2021-46705?
This vulnerability in grub2-once enables local attackers to truncate arbitrary files, potentially leading to unauthorized system changes.
The Impact of CVE-2021-46705
The severity of this CVE is rated as MEDIUM, with a CVSS base score of 5.1. The attack complexity is low, and no user interaction or special privileges are required, making it a concerning issue with potential integrity impact.
Technical Details of CVE-2021-46705
Explore the specific technical aspects of CVE-2021-46705 to better understand its implications and how to address them.
Vulnerability Description
The vulnerability lies in the insecure handling of temporary files by grub2-once, allowing attackers to tamper with files on affected systems.
Affected Systems and Versions
- SUSE Linux Enterprise Server 15 SP4 with grub2 version less than 2.06-150400.7.1
- openSUSE Factory with grub2 version less than 2.06-18.1
Exploitation Mechanism
Attackers can exploit this vulnerability locally, without the need for advanced privileges or user interaction, potentially leading to file manipulation on the system.
Mitigation and Prevention
Discover the steps to mitigate the risks associated with CVE-2021-46705 and secure your systems effectively.
Immediate Steps to Take
- Apply the necessary patches provided by SUSE promptly to address the vulnerability.
- Monitor system files and directories for unauthorized changes or activities.
Long-Term Security Practices
- Implement least privilege access to limit the impact of potential attacks.
- Conduct regular security audits and penetration testing to uncover vulnerabilities proactively.
Patching and Updates
- Stay informed about security updates from SUSE and apply them in a timely manner to ensure protection against known vulnerabilities.