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Resource Exhaustion Affecting python2.7 package, versions <2.7.16-2+deb10u2

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-DEBIAN10-PYTHON27-5423192
  • published 2 Sep 2021
  • disclosed 10 Mar 2022
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Introduced: 2 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 Debian:10 python2.7 to version 2.7.16-2+deb10u2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python2.7 package and not the python2.7 package as distributed by Debian. See How to fix? for Debian:10 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.