Host file disclosure via unrestricted loader path lookup
Published Feb 15, 2024 · Updated Feb 13, 2025
Information disclosure in FreeBSD bhyveload allows attackers to read host files through a malicious guest loader script. bhyveload file callbacks resolve guest-requested paths without constraining lookups beneath the directory supplied with -h, so traversal can escape that tree. Exposure requires FreeBSD 13.2-RELEASE before p10 or 14.0-RELEASE before p5, use of -h, and attacker influence over the guest image; disclosed files are limited to those readable by the bhyveload user, which is often root.
Summary
What happened
Information disclosure in FreeBSD bhyveload allows attackers to read host files through a malicious guest loader script. bhyveload file callbacks resolve guest-requested paths without constraining lookups beneath the directory supplied with -h, so traversal can escape that tree. Exposure requires FreeBSD 13.2-RELEASE before p10 or 14.0-RELEASE before p5, use of -h, and attacker influence over the guest image; disclosed files are limited to those readable by the bhyveload user, which is often root.
The record
- CVE
- CVE-2024-25940
- Published
- Feb 15, 2024
- Updated
- Feb 13, 2025
- Vendor
- The FreeBSD Project
- Product
- FreeBSD
- Classifications
- CWE-922, T1005
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 15, 2024CVE publishedPublication date reported by the CVE source.
- Feb 13, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=13.2-RELEASE <p10
- Affected versionversion=14.0-RELEASE <p5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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