CVE-2018-10908 : Security Advisory and Response

CVE-2018-10908 was published on August 9, 2018, and affects vdsm versions prior to 4.20.37. This vulnerability allows attackers to exploit qemu-img, potentially leading to denial of service attacks.

Understanding CVE-2018-10908

This CVE involves a resource restriction issue in vdsm that can be exploited to cause denial of service by consuming excessive memory or CPU time.

What is CVE-2018-10908?

CVE-2018-10908 is a vulnerability in vdsm versions before 4.20.37 that allows attackers to upload manipulated images, leading to resource exhaustion and potential denial of service.

The Impact of CVE-2018-10908

The vulnerability can result in a denial of service situation, affecting the host and potentially impacting other users due to resource consumption by the qemu-img process.

Technical Details of CVE-2018-10908

This section provides detailed technical information about the vulnerability.

Vulnerability Description

Vdsm, prior to version 4.20.37, does not enforce resource restrictions when running qemu-img on untrusted inputs, allowing attackers to cause resource exhaustion.

Affected Systems and Versions

Product: vdsm
Vendor: [UNKNOWN]
Affected Version: 4.20.37

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: Low
Availability Impact: High
Vector String: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Mitigation and Prevention

Protecting systems from CVE-2018-10908 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update vdsm to version 4.20.37 or newer to mitigate the vulnerability.
Monitor resource usage for unusual patterns that could indicate an ongoing attack.

Long-Term Security Practices

Implement network segmentation to limit the impact of potential denial of service attacks.
Regularly review and update security configurations to prevent similar vulnerabilities.

Patching and Updates

Apply patches provided by the vendor to address the resource restriction issue in vdsm.