SB2024103031 - Remote code execution in FreeBSD bhyve
Published: October 30, 2024
Security Bulletin ID
SB2024103031
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2024-41721)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a malicious guest to compromise the affected system.
The vulnerability exists due to a boundary condition in bhyve(8) when emulating device on a USB controller via XHCI emulation. A malicious guest can trigger an out-of-bounds read and crash the hypervisor or execute arbitrary code.
Note that bhyve runs in a Capsicum sandbox, so malicious code is constrained by the capabilities available to the bhyve process.
Remediation
Install update from vendor's website.