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. 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.
CVSS Metrics
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Attack Vector
- network
- Complexity
- low
- Privileges
- none
- User Action
- required
- Scope
- unchanged
- Confidentiality
- high
- Integrity
- high
- Availability
- high
- Weaknesses
- CWE-787
Metadata
- Primary Vendor
- FREEBSD
- Published
- 2/15/2024
- Last Modified
- 6/4/2025
- Source
- NIST NVD
- Note: Verify all details with official vendor sources before applying patches.
Affected Products
freebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsdfreebsd : freebsd
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