Authenticated file write via path traversal
Published Dec 10, 2021 · Updated Aug 4, 2024
Path traversal in OpenOlat before 15.5.12 and 16.0.5 allows remote authenticated users to write files via REST filenames. REST upload methods pass caller-controlled filenames into VFS resolve and createChildLeaf operations, allowing relative paths to escape the intended container; the patch adds an in-path check and rejects traversal. Exploitation requires an OpenOlat account, enabled REST API, and rights on the targeted business object, with writes bounded by the application server account permissions.
Summary
What happened
Path traversal in OpenOlat before 15.5.12 and 16.0.5 allows remote authenticated users to write files via REST filenames. REST upload methods pass caller-controlled filenames into VFS resolve and createChildLeaf operations, allowing relative paths to escape the intended container; the patch adds an in-path check and rejects traversal. Exploitation requires an OpenOlat account, enabled REST API, and rights on the targeted business object, with writes bounded by the application server account permissions.
The record
- CVE
- CVE-2021-41242
- Published
- Dec 10, 2021
- Updated
- Aug 4, 2024
- Vendor
- frentix GmbH
- Product
- OpenOlat
- Classifications
- CWE-23, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 10, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record 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=< 15.5.12
- Affected versionversion=>= 16.0.0, < 16.0.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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