National Vulnerability Database

National Vulnerability Database

National Vulnerability
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    Vulnerabilities Detail

CVE-2019-9947 Detail

Current 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 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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 6.1 MEDIUM
Vector: AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N (V3 legend)
Impact Score: 2.7
Exploitability Score: 2.8

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Changed
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

CVSS v2.0 Severity and Metrics:

Base Score: 4.3 MEDIUM
Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 8.6

Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): None
Integrity (I): Partial
Availability (A): None
Additional Information:
Victim must voluntarily interact with attack mechanism
Allows unauthorized modification

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://access.redhat.com/errata/RHSA-2019:1260
https://access.redhat.com/errata/RHSA-2019:2030
https://bugs.python.org/issue35906 Exploit Issue Tracking Patch Vendor Advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html
https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html
https://lists.debian.org/debian-lts-announce/2019/06/msg00026.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JMWSKTNOHSUOT3L25QFJAVCFYZX46FYK/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JXASHCDD4PQFKTMKQN4YOP5ZH366ABN4/
https://security.netapp.com/advisory/ntap-20190404-0004/

Technical Details

Vulnerability Type (View All)

  • Improper Neutralization of CRLF Sequences ('CRLF Injection') (CWE-93)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
2.0		Up to (including)
2.7.15
 cpe:2.3:a:python:python:2.7.16:-:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
3.0.0		Up to (including)
3.7.2


Change History

9 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-9947
NVD Published Date:
03/23/2019
NVD Last Modified:
05/28/2019