HTTP Request Smuggling Affecting python3-libs package, versions <0:3.6.8-37.el8


0.0
medium

Snyk CVSS

    Attack Complexity High
    User Interaction Required
    Availability High

    Threat Intelligence

    EPSS 0.14% (49th 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-CENTOS8-PYTHON3LIBS-2102684
  • published 26 Jul 2021
  • disclosed 13 Feb 2021

How to fix?

Upgrade Centos:8 python3-libs to version 0:3.6.8-37.el8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-libs package and not the python3-libs package as distributed by Centos. See How to fix? for Centos:8 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