Path traveral in Streamlit on windows

### 1. Impacted Products Streamilt Open Source versions before 1.37.0. ### 2. Introduction Snowflake Streamlit open source addressed a security vulnerability via the [static file sharing feature](https://docs.streamlit.io/develop/concepts/configuration/serving-static-files). The vulnerability was patched on Jul 25, 2024, as part of Streamlit open source version 1.37.0. The vulnerability only affects Windows. ### 3. Path Traversal Vulnerability #### 3.1 Description On May 12, 2024, Streamlit was informed via our bug bounty program about a path traversal vulnerability in the open source library. We fixed and merged a patch remediating the vulnerability on Jul 25, 2024. The issue was determined to be in the moderate severity range with a maximum CVSSv3 base score of [5.9](https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N) #### 3.2 Scenarios and attack vector(s) Users of hosted Streamlit app(s) on Windows were vulnerable to a path traversal vulnerability when the [static file sharing feature](https://docs.streamlit.io/develop/concepts/configuration/serving-static-files) is enabled. An attacker could utilize the vulnerability to leak the password hash of the Windows user running Streamlit. #### 3.3 Resolution The vulnerability has been fixed in all Streamlit versions released since Jul 25, 2024. We recommend all users upgrade to Version 1.37.0. ### 4. Contact Please contact security@snowflake.com if you have any questions regarding this advisory. If you discover a security vulnerability in one of our products or websites, please report the issue to HackerOne. For more information, please see our [Vulnerability Disclosure Policy](https://hackerone.com/snowflake?type=team).

CVSS 3.0

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N

Severity from

GitHub (reviewed advisory)

Weakness

CWE-22

Also known as

CVE-2024-42474, PYSEC-2024-153

• github.com/streamlit/streamlit/security/advisories/GHSA-rxff-vr5r-8cj5
• nvd.nist.gov/vuln/detail/CVE-2024-42474
• github.com/streamlit/streamlit/commit/3a639859cfdfba2187c81897d44a3e33825eb0a3
• github.com/pypa/advisory-database/tree/main/vulns/streamlit/PYSEC-2024-153.yaml
• github.com/streamlit/streamlit