CVE-2023-38428 : Security Advisory and Response
CVE-2023-38428 describes a Linux kernel vulnerability before 6.3.4 that allows an out-of-bounds read via UserName, leading to unauthorized access or denial of service.
An issue was discovered in the Linux kernel before 6.3.4, where fs/ksmbd/smb2pdu.c in ksmbd does not properly check the UserName value, leading to an out-of-bounds read.
Understanding CVE-2023-38428
This CVE describes a vulnerability in the Linux kernel that could be exploited to trigger an out-of-bounds read due to improper validation of the UserName value.
What is CVE-2023-38428?
CVE-2023-38428 is a security flaw in the Linux kernel before version 6.3.4 that allows for an out-of-bounds read through the UserName value in fs/ksmbd/smb2pdu.c.
The Impact of CVE-2023-38428
Exploitation of this vulnerability could potentially lead to unauthorized access to sensitive data, escalation of privileges, or a denial of service (DoS) attack.
Technical Details of CVE-2023-38428
This section provides a deeper look into the vulnerability, including its description, affected systems and versions, and the exploitation mechanism.
Vulnerability Description
The vulnerability arises from the lack of proper validation of the UserName value in fs/ksmbd/smb2pdu.c, allowing for an out-of-bounds read operation.
Affected Systems and Versions
All versions of the Linux kernel before 6.3.4 are affected by this vulnerability.
Exploitation Mechanism
An attacker can exploit this vulnerability by crafting a malicious request that triggers an out-of-bounds read via the UserName value.
Mitigation and Prevention
Learn about the immediate steps to take to secure your systems, establish long-term security practices, and stay updated with patching.
Immediate Steps to Take
Ensure that sensitive systems are isolated, monitor network traffic for any suspicious activity, and apply security updates promptly.
Long-Term Security Practices
Implement strong access controls, conduct regular security audits, educate users on best security practices, and keep abreast of security advisories.
Patching and Updates
Regularly check for updates from the Linux kernel project and apply patches as soon as they are available.