bhyve virtio_scsi ctl_report_supported_opcodes Arbitrary Write Host Exec
CVE-2024-42416 Published on September 5, 2024
The ctl_report_supported_opcodes function did not sufficiently validate a field provided by userspace, allowing an arbitrary write to a limited amount of kernel help memory. Malicious software running in a guest VM that exposes virtio_scsi can exploit the vulnerabilities to achieve code execution on the host in the bhyve userspace process, which typically runs as root. Note that bhyve runs in a Capsicum sandbox, so malicious code is constrained by the capabilities available to the bhyve process. A malicious iSCSI initiator could achieve remote code execution on the iSCSI target host.
Vulnerability Analysis
CVE-2024-42416 is exploitable with local system access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Types
Improper Filtering of Special Elements
The software receives data from an upstream component, but does not filter or incorrectly filters special elements before sending it to a downstream component.
What is an Untrusted pointer offset Vulnerability?
The program performs pointer arithmetic on a valid pointer, but it uses an offset that can point outside of the intended range of valid memory locations for the resulting pointer.
CVE-2024-42416 has been classified to as an Untrusted pointer offset vulnerability or weakness.
Products Associated with CVE-2024-42416
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2024-42416 are published in FreeBSD:
Affected Versions
FreeBSD:- Version 14.1-RELEASE and below p4 is affected.
- Version 14.0-RELEASE and below p10 is affected.
- Version 13.3-RELEASE and below p6 is affected.
- Version 14.1 and below 14.1_p4 is affected.
- Version 14.0 and below 14.0_p10 is affected.
- Version 13.3 and below 13.3_p6 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.