CVE-2020-25650 : What You Need to Know

A flaw in the spice-vdagentd daemon could allow an unprivileged local guest user to perform a memory denial of service, affecting system availability.

Understanding CVE-2020-25650

This CVE involves a vulnerability in the spice-vdagentd daemon that could be exploited by a local guest user to disrupt system availability.

What is CVE-2020-25650?

The flaw in the spice-vdagentd daemon allows unauthorized local users to impact system availability by exploiting file transfers from the host system to the virtual machine.

The Impact of CVE-2020-25650

The vulnerability poses a threat to system availability, as unprivileged local guest users can cause a memory denial of service for spice-vdagentd and other processes in the VM system.

Technical Details of CVE-2020-25650

This section provides technical details about the CVE.

Vulnerability Description

The flaw in spice-vdagentd allows unprivileged local users to disrupt system availability by exploiting file transfers within the virtual machine.

Affected Systems and Versions

Affected Product: spice-vdagent
Affected Versions: spice-vdagent versions prior and including 0.20

Exploitation Mechanism

Unauthorized local guest users with access to the UNIX domain socket path

/run/spice-vdagentd/spice-vdagent-sock

can exploit this vulnerability to perform a memory denial of service.

Mitigation and Prevention

Protect your systems from CVE-2020-25650 with the following steps:

Immediate Steps to Take

Apply the latest security updates provided by the vendor.
Restrict access to the UNIX domain socket path

/run/spice-vdagentd/spice-vdagent-sock

.

Long-Term Security Practices

Regularly monitor and audit system activity for any unauthorized access.
Educate users on best security practices to prevent unauthorized exploitation.

Patching and Updates

Ensure that you regularly update and patch the spice-vdagent software to mitigate the vulnerability.