Products
Xen Hypervisor
Source
security@xen.org
Tags
CVE-2024-31145 details
Last Modified : Sept. 25, 2024, 2:35 p.m.
Description
Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR") for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typically used for platform tasks such as legacy USB emulation. Since the precise purpose of these regions is unknown, once a device associated with such a region is active, the mappings of these regions need to remain continuouly accessible by the device. In the logic establishing these mappings, error handling was flawed, resulting in such mappings to potentially remain in place when they should have been removed again. Respective guests would then gain access to memory regions which they aren't supposed to have access to.
CVSS Score
| 1 | 2 | 3 | 4 | 5 | 6 | 7.5 | 8 | 9 | 10 |
|---|
Weakness
| Weakness | Name | Description |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. |
CVSS Data
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Base Score
7.5
Exploitability Score
0.8
Impact Score
6.0
Base Severity
HIGH
Vector String : CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
References
| URL | Source |
|---|---|
| https://xenbits.xenproject.org/xsa/advisory-460.html | security@xen.org |