Vulnerability Monitor

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CVE-2023-3494

The fwctl driver implements a state machine which is executed when a bhyve guest accesses certain x86 I/O ports. The interface lets the guest copy a string into a buffer resident in the bhyve process' memory. A bug in the state machine implementation can result in a buffer overflowing when copying this string. Malicious, privileged software running in a guest VM can exploit the buffer overflow to achieve code execution on the host in the bhyve userspace process, which typically runs as root, mitigated by the capabilities assigned through the Capsicum sandbox available to the bhyve process.

Published

2023-08-01T23:15:31.053

Last Modified

2025-02-13T17:16:57.040

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

Weaknesses
  • Type: Secondary
    CWE-120
  • Type: Primary
    CWE-120
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System freebsd freebsd 13.1 Yes
Operating System freebsd freebsd 13.1 Yes
Operating System freebsd freebsd 13.1 Yes
Operating System freebsd freebsd 13.1 Yes
Operating System freebsd freebsd 13.1 Yes
Operating System freebsd freebsd 13.1 Yes
Operating System freebsd freebsd 13.1 Yes
Operating System freebsd freebsd 13.1 Yes
Operating System freebsd freebsd 13.1 Yes
Operating System freebsd freebsd 13.1 Yes
Operating System freebsd freebsd 13.1 Yes
Operating System freebsd freebsd 13.1 Yes
Operating System freebsd freebsd 13.2 Yes
Operating System freebsd freebsd 13.2 Yes
References