Local privilege escalation via world-writable model cache
Published Nov 25, 2024 · Updated Nov 25, 2024
Incorrect directory permissions in MLflow before 2.16.0 allow local users to gain privileges when spark_udf processes a model. The _create_model_downloading_tmp_dir helper changes a newly created model-download directory from mode 0700 to 0777, allowing other local users to replace its contents during the download-use gap. Exploitation requires spark_udf to create the directory while a higher-privileged process loads the substituted model files.
Summary
What happened
Incorrect directory permissions in MLflow before 2.16.0 allow local users to gain privileges when spark_udf processes a model. The _create_model_downloading_tmp_dir helper changes a newly created model-download directory from mode 0700 to 0777, allowing other local users to replace its contents during the download-use gap. Exploitation requires spark_udf to create the directory while a higher-privileged process loads the substituted model files.
The record
- CVE
- CVE-2024-27134
- Published
- Nov 25, 2024
- Updated
- Nov 25, 2024
- Vendor
- MLflow Project
- Product
- MLflow
- Classifications
- CWE-276, T1068
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 25, 2024CVE publishedPublication date reported by the CVE source.
- Nov 25, 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=0 <2.16.0
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
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Technologies
Your stack
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Your stack
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