CVE-2019-9740

python: CRLF injection via the query part of the url passed to urlopen()

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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
(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.

Se detectó un problema en urllib2 en Python 2.x hasta 2.7.16 y urllib en Python 3.x hasta 3.7.3. La inyección de CRLF es posible si el atacante controla un parámetro url, como lo demuestra el primer argumento de urllib.request.urlopen con \r
(específicamente en la cadena de consulta después de un carácter ?) Seguido por un encabezado HTTP o un comando Redis. Esto está corregido en las versiones: 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

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-03-12 CVE Reserved
2019-03-13 CVE Published
2024-08-03 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')
CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

CAPEC

References (31)

URL	Tag	Source
http://packetstormsecurity.com/files/154927/Slackware-Security-Advisory-python-Updates.html	Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/02/04/2	Mailing List
http://www.securityfocus.com/bid/107466	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html	Mailing List
https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html	Mailing List
https://lists.debian.org/debian-lts-announce/2019/06/msg00026.html	Mailing List
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html	Mailing List
https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html	Mailing List
https://seclists.org/bugtraq/2019/Oct/29	Mailing List
https://security.netapp.com/advisory/ntap-20190619-0005	Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html	Third Party Advisory

URL	Date	SRC
https://bugs.python.org/issue36276	2024-08-04

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html	2023-11-07
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00041.html	2023-11-07
https://access.redhat.com/errata/RHSA-2019:1260	2023-11-07
https://access.redhat.com/errata/RHSA-2019:2030	2023-11-07
https://access.redhat.com/errata/RHSA-2019:3335	2023-11-07
https://access.redhat.com/errata/RHSA-2019:3520	2023-11-07
https://access.redhat.com/errata/RHSA-2019:3725	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ORNTF62QPLMJXIQ7KTZQ2776LMIXEKL	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/44TS66GJMO5H3RLMVZEBGEFTB6O2LJJU	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JMWSKTNOHSUOT3L25QFJAVCFYZX46FYK	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JXASHCDD4PQFKTMKQN4YOP5ZH366ABN4	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX	2023-11-07
https://security.gentoo.org/glsa/202003-26	2023-11-07
https://usn.ubuntu.com/4127-1	2023-11-07
https://usn.ubuntu.com/4127-2	2023-11-07
https://access.redhat.com/security/cve/CVE-2019-9740	2020-04-14
https://bugzilla.redhat.com/show_bug.cgi?id=1688169	2020-04-14

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				>= 2.0 < 2.7.17 Search vendor "Python" for product "Python" and version " >= 2.0 < 2.7.17"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				>= 3.5.0 < 3.5.8 Search vendor "Python" for product "Python" and version " >= 3.5.0 < 3.5.8"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				>= 3.6.0 < 3.6.9 Search vendor "Python" for product "Python" and version " >= 3.6.0 < 3.6.9"		-		Affected
Python Search vendor "Python"		Python Search vendor "Python" for product "Python"				>= 3.7.0 < 3.7.4 Search vendor "Python" for product "Python" and version " >= 3.7.0 < 3.7.4"		-		Affected