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FreeBSD: VID-8EAAF135-1893-11ED-9B22-002590C1F29C (CVE-2022-23092): FreeBSD -- Missing bounds check in 9p message handling

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FreeBSD: VID-8EAAF135-1893-11ED-9B22-002590C1F29C (CVE-2022-23092): FreeBSD -- Missing bounds check in 9p message handling

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
08/09/2022
Created
11/08/2022
Added
11/04/2022
Modified
11/04/2022

Description

Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.

From VID-8EAAF135-1893-11ED-9B22-002590C1F29C:

Problem Description:

The implementation of lib9p's handling of RWALK messages was

missing a bounds check needed when unpacking the message contents.

The missing check means that the receipt of a specially crafted

message will cause lib9p to overwrite unrelated memory.

Impact:

The bug can be triggered by a malicious bhyve guest kernel to

overwrite memory in the bhyve(8) process. This could potentially lead

to user-mode code execution on the host, subject to bhyve's Capsicum

sandbox.

Solution(s)

  • freebsd-upgrade-base-13_0-release-p12
  • freebsd-upgrade-base-13_1-release-p1

References

  • CVE-2022-23092

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