CVE-2021-29631 Information

Description

In FreeBSD 13.0-STABLE before n246941-20f96f215562 12.2-STABLE before r370400 11.4-STABLE before r370399 13.0-RELEASE before p4 12.2-RELEASE before p10 and 11.4-RELEASE before p13 certain VirtIO-based device models in bhyve failed to handle errors when fetching I/O descriptors. A malicious guest may cause the device model to operate on uninitialized I/O vectors leading to memory corruption crashing of the bhyve process and possibly arbitrary code execution in the bhyve process.

CVSS Vector

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

Reference

https://security.FreeBSD.org/advisories/FreeBSD-SA-21:13.bhyve.asc https://security.netapp.com/advisory/ntap-20210923-0004/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8