CVE-2020-23793

2023-08-2815:04:13

redhat.com

access.redhat.com

flaw

spice-server

unauthorized restart

kvm

virtual machine

tcp packet

mitigation

red hat product security

8.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

0.0005 Low

EPSS

Percentile

17.1%

JSON

A flaw was found in spice-server in Redhat’s VDI product that can restart KVMvirtual machine without any authorization. A handshake is required before spice-server and spice-client can establish communication, and spice-client will send a request containing information that the server needs. This TCP request requires only host and port; A malformed TCP packet causes the vm to crash and the QEMu-KVM process to be restarted.

Mitigation

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.