CVE-2019-18348

MEDIUM

Description

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.)

References

http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00041.html

https://bugs.python.org/issue30458#msg347282

https://bugzilla.redhat.com/show_bug.cgi?id=1727276

https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/

https://lists.fedoraproject.org/archives/list/[email protected]/message/A5NSAX4SC3V64PGZUPH7PRDLSON34Q5A/

https://lists.fedoraproject.org/archives/list/[email protected]/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/

https://lists.fedoraproject.org/archives/list/[email protected]/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/

https://lists.fedoraproject.org/archives/list/[email protected]/message/UESGYI5XDAHJBATEZN3MHNDUBDH47AS6/

https://security.netapp.com/advisory/ntap-20191107-0004/

https://usn.ubuntu.com/4333-1/

https://usn.ubuntu.com/4333-2/

https://www.oracle.com/security-alerts/cpuoct2020.html

Details

Source: MITRE

Published: 2019-10-23

Updated: 2020-10-20

Type: CWE-74

Risk Information

CVSS v2.0

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3.0

Base Score: 6.1

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Impact Score: 2.7

Exploitability Score: 2.8

Severity: MEDIUM