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Resource Exhaustion Affecting python3.4 package, versions <3.4.3-1ubuntu1~14.04.7+esm11

0.0
medium

Snyk CVSS

    Attack Complexity Low
    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-UBUNTU1404-PYTHON34-3043096
  • published 4 Sep 2021
  • disclosed 10 Mar 2022
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Introduced: 4 Sep 2021

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

How to fix?

Upgrade Ubuntu:14.04 python3.4 to version 3.4.3-1ubuntu1~14.04.7+esm11 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3.4 package and not the python3.4 package as distributed by Ubuntu. See How to fix? for Ubuntu:14.04 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.