CVE-2020-7694
Summary
| CVE | CVE-2020-7694 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2020-07-27 12:15:00 UTC |
| Updated | 2021-07-21 11:39:00 UTC |
| 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). |
Risk And Classification
Problem Types: CWE-94 | CWE-116
NVD Known Affected Configurations (CPE 2.3)
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| GitHub - encode/uvicorn: The lightning-fast ASGI server. ???? | MISC | github.com | Product, Third Party Advisory |
| Log Injection in uvicorn | Snyk | MISC | snyk.io | Exploit, Third Party Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
LEGACY: Everardo Padilla Saca
Legacy QID Mappings
- 981862 Python (pip) Security Update for uvicorn (GHSA-33c7-2mpw-hg34)