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Resource Exhaustion Affecting python-urllib3 package, versions *

low

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.29% (69th percentile)
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NVD
7.5 high
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SUSE
7.5 high
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Red Hat
7.5 high

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  • Snyk ID SNYK-UBUNTU2010-PYTHONURLLIB3-1304498
  • published 11 Jun 2021
  • disclosed 29 Jun 2021
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Introduced: 11 Jun 2021

CVE-2021-33503 Open this link in a new tab
CWE-400 Open this link in a new tab

How to fix?

There is no fixed version for Ubuntu:20.10 python-urllib3.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-urllib3 package and not the python-urllib3 package as distributed by Ubuntu. See How to fix? for Ubuntu:20.10 relevant fixed versions and status.

An issue was discovered in urllib3 before 1.26.5. When provided with a URL containing many @ characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect.

References