Race Condition Affecting webargs package, versions [,5.1.3)


0.0
medium

Snyk CVSS

    Attack Complexity High

    Threat Intelligence

    EPSS 0.22% (61st percentile)
Expand this section
NVD
8.1 high

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  • Snyk ID SNYK-PYTHON-WEBARGS-173773
  • published 12 Mar 2019
  • disclosed 12 Mar 2019
  • credit ThiefMaster

How to fix?

Upgrade webargs to version 5.1.3 or higher.

Overview

webargs is a python library for parsing and validating HTTP request objects, with built-in support for popular web frameworks, including Flask, Django, Bottle, Tornado, Pyramid, webapp2, Falcon, and aiohttp.

Affected versions of this package are vulnerable to Race Condition. Json parsing uses a short-lived cache to store the parsed Json body. This cache is not thread-safe, meaning that incorrect Json payloads could have been parsed for concurrent requests.