CVE-2021-29631 — HIGH (7.8)

Vulnerability 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 Score

7.8

HIGH

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Freebsd	Freebsd	11.4

Related Weaknesses (CWE)

CWE-908

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-21:13.bhyve.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20210923-0004/Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-21:13.bhyve.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20210923-0004/Third Party Advisory

FAQ

What is CVE-2021-29631?

CVE-2021-29631 is a vulnerability with a CVSS score of 7.8 (HIGH). 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...

How severe is CVE-2021-29631?

CVE-2021-29631 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-29631?

Check the references section above for vendor advisories and patch information. Affected products include: Freebsd Freebsd.