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Q1What is this vulnerability? (Essence + Consequences)
๐จ **Essence**: Mlflow < 2.3.1 suffers from **Local File Read** via Path Traversal. ๐ฅ **Consequences**: Attackers can access sensitive local files on the server, potentially leaking credentials, configs, or source code.โฆ
๐ฆ **Affected**: **Mlflow** (mlflow/mlflow). ๐ **Versions**: All versions **prior to 2.3.1**. If you are running 2.3.0 or earlier, you are vulnerable. ๐ข **Vendor**: Mlflow (Open Source ML Lifecycle Platform).
Q4What can hackers do? (Privileges/Data)
๐ **Attacker Actions**: Hackers can **read arbitrary local files** from the server's filesystem.โฆ
โ๏ธ **Exploitation Threshold**: **Low to Medium**. The vulnerability relies on **Path Traversal**. It typically requires the attacker to have some level of access to the Mlflow UI or API to submit the malicious path.โฆ
๐ **Public Exploit**: **Yes**. A PoC is available via **Nuclei Templates** (ProjectDiscovery). ๐ **Link**: `https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-2780.yaml`.โฆ
๐ **Self-Check**: Scan your infrastructure using **Nuclei** with the specific CVE template. ๐ ๏ธ **Feature**: Look for requests containing `\..\` in file path parameters.โฆ
โ **Official Fix**: **Yes**. The vulnerability was fixed in **Mlflow 2.3.1**. ๐ **Commit**: `fae77a525dd908c56d6204a4cef1c1c75b4e9857`. ๐ **Mitigation**: Upgrade to version 2.3.1 or later immediately.โฆ
๐ง **No Patch Workaround**: If you cannot upgrade immediately: 1. **Restrict Access**: Ensure Mlflow is not exposed to the public internet. 2. **WAF Rules**: Block requests containing `\..\` or `../` in URL parameters.โฆ
๐ฅ **Urgency**: **High**. Since a public PoC exists and it allows direct file reading, the risk of data exfiltration is immediate. ๐ **Published**: May 17, 2023. โก **Priority**: Patch immediately if exposed.โฆ