CRLF Injection Affecting python package, versions [2.0,2.7.17)[3.0.0, 3.5.8)[3.6.0, 3.6.9)[3.7.0,3.7.4)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.4% (74th percentile)

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  • Snyk IDSNYK-UNMANAGED-PYTHON-2317642
  • published14 Dec 2021
  • disclosed23 Mar 2019
  • creditUnknown

Introduced: 23 Mar 2019

CVE-2019-9947  (opens in a new tab)
CWE-93  (opens in a new tab)

How to fix?

Upgrade python to version 2.7.17, 3.5.8, 3.6.9, 3.7.4 or higher.

Overview

Affected versions of this package are vulnerable to CRLF Injection. An issue was discovered in urllib2 in Python 2.x through 2.7.16 and urllib in Python 3.x through 3.7.3. 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 path component of a URL that lacks a ? character) followed by an HTTP header or a Redis command. This is similar to the CVE-2019-9740 query string issue. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.

CVSS Scores

version 3.1