Vulnerability 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).
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Encode | Uvicorn | - |
Related Weaknesses (CWE)
References
- https://github.com/encode/uvicornProductThird Party Advisory
- https://snyk.io/vuln/SNYK-PYTHON-UVICORN-575560ExploitThird Party Advisory
- https://github.com/encode/uvicornProductThird Party Advisory
- https://snyk.io/vuln/SNYK-PYTHON-UVICORN-575560ExploitThird Party Advisory
FAQ
What is CVE-2020-7694?
CVE-2020-7694 is a vulnerability with a CVSS score of 3.7 (LOW). 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 o...
How severe is CVE-2020-7694?
CVE-2020-7694 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-7694?
Check the references section above for vendor advisories and patch information. Affected products include: Encode Uvicorn.