GitHub Advisoryadvisory · PyPI
GHSA-33c7-2mpw-hg34 Log injection in uvicorn
HIGH
Official page ↗
- Aliases
- CVE-2020-7694
- Ecosystem
- PyPI
- Packages
- uvicorn
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weaknesses
- CWE-116, CWE-94
- Reviewed
- 2020-07-29
Affected packages
• PyPI uvicorn: < 0.11.7 → fixed in 0.11.7
Description
This affects all versions of package uvicorn. The request logger provided by the package is vulnerable to ASNI escape sequence injection. Whenever any HTTP request is received, the default behaviour of uvicorn is to log its details to either the console or a log file. When attackers request crafted URLs with percent-encoded escape sequences, the logging component will log the URL after it's been processed with urllib.parse.unquote, therefore converting any percent-encoded characters into their single-character equivalent, which can have special meaning in terminal emulators. By requesting URLs with crafted paths, attackers can: * Pollute uvicorn's access logs, therefore jeopardising the integrity of such files. * Use ANSI sequence codes to attempt to interact with the terminal emulator that's displaying the logs (either in real time or from a file).
Related
Alias · CVE (1)
- CVE-2020-7694 This affects all versions of package uvicorn. vulnerability
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-7694 advisory
- https://github.com/encode/uvicorn/issues/723 web
- https://github.com/encode/uvicorn/commit/895807f94ea9a8e588605c12076b7d7517cda503 web
- https://github.com/encode/uvicorn package
- https://github.com/pypa/advisory-database/tree/main/vulns/uvicorn/PYSEC-2020-150.yaml web
- https://snyk.io/vuln/SNYK-PYTHON-UVICORN-575560 web