CVE-2019-9740

Medium

Description

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 query string after a ? character) followed by an HTTP header or a Redis command. 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.

SeverityMedium

CVSS6.1

Exploit probability—

Product

Python

PublishedMar 13, 2019

First seenMar 13, 2019

Weakness typeCWE-93CWE-93

How to fix

Update

python python2.7.17, 3.5.8, 3.6.9, 3.7.4 or later

Vendor advisories

Affected products

Product	Affected versions	Fixed in
python python	2.0 ≤ v < 2.7.17, 3.5.0 ≤ v < 3.5.8, 3.6.0 ≤ v < 3.6.9, 3.7.0 ≤ v < 3.7.4	2.7.17, 3.5.8, 3.6.9, 3.7.4

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