GitHub Advisoryadvisory · PyPI

GHSA-33c7-2mpw-hg34 Log injection in uvicorn

HIGH Published 2020-07-29 Modified 2024-11-18 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

Weakness · CWE (2)

  • CWE-116 Improper Encoding or Escaping of Output weakness
  • CWE-94 Improper Control of Generation of Code weakness

References