CVE-2020-27173 Information

Description

In vm-superio before 0.1.1 the serial console FIFO can grow to unlimited memory usage when data is sent to the input source (i.e. standard input). This behavior cannot be reproduced from the guest side. When no rate limiting is in place the host can be subject to memory pressure impacting all other VMs running on the same host.

CVSS Vector

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

Reference

https://github.com/rust-vmm/vm-superio/issues/17 https://github.com/rust-vmm/vm-superio/pull/19

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5