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HTTP Request Smuggling Affecting python3.7 package, versions *

0.0
medium

Snyk CVSS

    Attack Complexity High
    User Interaction Required
    Availability High

    Threat Intelligence

    EPSS 0.14% (50th percentile)
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NVD
5.9 medium
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SUSE
5.9 medium
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Red Hat
5.9 medium

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  • Snyk ID SNYK-DEBIAN10-PYTHON37-1075120
  • published 16 Feb 2021
  • disclosed 15 Feb 2021
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Introduced: 15 Feb 2021

CVE-2021-23336 Open this link in a new tab
CWE-444 Open this link in a new tab

How to fix?

There is no fixed version for Debian:10 python3.7.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3.7 package and not the python3.7 package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

The package python/cpython from 0 and before 3.6.13, from 3.7.0 and before 3.7.10, from 3.8.0 and before 3.8.8, from 3.9.0 and before 3.9.2 are vulnerable to Web Cache Poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter.

References