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Resource Exhaustion Affecting python27 package, versions <0:2.7.18-2.142.amzn1

0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Availability High

    Threat Intelligence

    EPSS 0.27% (66th percentile)
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NVD
6.5 medium
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SUSE
4 medium
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Red Hat
6.5 medium

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  • Snyk ID SNYK-AMZN201803-PYTHON27-2866058
  • published 10 Jun 2022
  • disclosed 10 Mar 2022
Report a new vulnerability Found a mistake?

Introduced: 10 Mar 2022

CVE-2021-3733 Open this link in a new tab
CWE-400 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2018.03 python27 to version 0:2.7.18-2.142.amzn1 or higher.
This issue was patched in ALAS-2022-1593.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python27 package and not the python27 package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.