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HTTP Response Splitting Affecting python27 package, versions <0:2.7.18-1.138.amzn1

0.0
medium

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.28% (69th percentile)
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NVD
6.1 medium
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SUSE
6.1 medium
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Red Hat
6.5 medium

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  • Snyk ID SNYK-AMZN201803-PYTHON27-3329927
  • published 23 Feb 2023
  • disclosed 23 Oct 2019
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Introduced: 23 Oct 2019

CVE-2019-18348 Open this link in a new tab
CWE-113 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2018.03 python27 to version 0:2.7.18-1.138.amzn1 or higher.
This issue was patched in ALAS-2020-1407.

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.

An issue was discovered in urllib2 in Python 2.x through 2.7.17 and urllib in Python 3.x through 3.8.0. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \r\n (specifically in the host component of a URL) followed by an HTTP header. This is similar to the CVE-2019-9740 query string issue and the CVE-2019-9947 path string issue. (This is not exploitable when glibc has CVE-2016-10739 fixed.). This is fixed in: v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1; v3.6.11, v3.6.11rc1, v3.6.12; v3.7.8, v3.7.8rc1, v3.7.9; v3.8.3, v3.8.3rc1, v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1.

References