CVE-2024-0565: What You Need to Know

This CVE-2024-0565 article discusses a remote code execution vulnerability found in the cifs filesystem decryption function receive_encrypted_standard of the Linux Kernel.

Understanding CVE-2024-0565

CVE-2024-0565 is a moderate-severity vulnerability with a CVSS base score of 6.8. The flaw allows for an out-of-bounds memory read in the SMB Client sub-component of the kernel, leading to a denial of service.

What is CVE-2024-0565?

The vulnerability in receive_encrypted_standard in the Linux Kernel's SMB Client sub-component occurs due to an integer underflow on the memcpy length, causing the denial of service.

The Impact of CVE-2024-0565

This vulnerability has a medium severity level with a high impact on confidentiality, integrity, and availability of the affected systems. Attackers could potentially execute remote code on vulnerable systems.

Technical Details of CVE-2024-0565

This section delves into the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability stems from an out-of-bounds memory read in the receive_encrypted_standard function of the SMB Client sub-component, leading to a denial of service.

Affected Systems and Versions

The Linux Kernel version 6.7-rc6 is reported as unaffected.
Red Hat Enterprise Linux versions 6, 7, 8, and 9 are affected by the vulnerability.
Fedora is also listed as unaffected by this vulnerability.

Exploitation Mechanism

The vulnerability can be exploited remotely by an attacker adjacent to the network with low privileges required. User interaction is necessary for successful exploitation.

Mitigation and Prevention

To address CVE-2024-0565, immediate steps and long-term security practices are recommended.

Immediate Steps to Take

To mitigate the vulnerability, blacklist the cifs module to prevent it from loading automatically. See Red Hat's solution article for more information.

Long-Term Security Practices

Ensure timely patching and updates of the affected systems. Implement robust security practices and monitoring to prevent and detect potential exploits.

Patching and Updates

Red Hat provides updates for the impacted Red Hat Enterprise Linux versions. Regularly check for security advisories and apply patches promptly to mitigate risks.

This detailed breakdown of CVE-2024-0565 aims to provide insights into the vulnerability, its impact, affected systems, and mitigation strategies to secure systems from potential exploitation.