CVE-2019-9740

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Summary

CVECVE-2019-9740
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-03-13 03:29:00 UTC
Updated2026-10-14 07:16:57 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

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

Problem Types: CWE-93 | n/a | CWE-93 CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.1ADPDECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
2.0[email protected]Primary4.3AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Python Python All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
[SECURITY] Fedora 29 Update: python3-3.7.3-3.fc29 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 29 Update: python36-3.6.9-1.fc29 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
Python: Multiple vulnerabilities (GLSA 202003-26) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
[security-announce] openSUSE-SU-2019:2133-1: moderate: Security update f af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
Issue 36276: [CVE-2019-9740] Python urllib CRLF injection vulnerability - Python tracker af854a3a-2127-422b-91ae-364da2661108 bugs.python.org Exploit, Issue Tracking, Vendor Advisory
[SECURITY] Fedora 29 Update: python35-3.5.8-2.fc29 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 30 Update: python35-3.5.8-2.fc30 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] [DLA 2280-1] python3.5 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
USN-4127-2: Python vulnerabilities | Ubuntu security notices | Ubuntu af854a3a-2127-422b-91ae-364da2661108 usn.ubuntu.com Third Party Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
[SECURITY] [DLA 2337-1] python2.7 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
Oracle Critical Patch Update Advisory - July 2022 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
CVE-2019-9740 Python Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
[SECURITY] Fedora 30 Update: python3-3.7.3-3.fc30 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] [DLA 1834-1] python2.7 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Slackware Security Advisory - python Updates ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com Third Party Advisory, VDB Entry
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Python CVE-2019-9740 CRLF Injection Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory, VDB Entry
[SECURITY] [DLA 1835-2] python3.4 regression update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
[security-announce] openSUSE-SU-2019:2131-1: moderate: Security update f af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
Bugtraq: [slackware-security] python (SSA:2019-293-01) af854a3a-2127-422b-91ae-364da2661108 seclists.org Mailing List, Third Party Advisory
oss-security - [CVE-2020-15693, CVE-2020-15694] Nim - stdlib Httpclient - Header Crlf Injection & Server Response Validation af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
[SECURITY] Fedora 30 Update: python36-3.6.9-1.fc30 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 31 Update: python35-3.5.8-2.fc31 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
[SECURITY] [DLA 1835-1] python3.4 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
USN-4127-1: Python vulnerabilities | Ubuntu security notices | Ubuntu af854a3a-2127-422b-91ae-364da2661108 usn.ubuntu.com Third Party Advisory
[SECURITY] Fedora 30 Update: python3-3.7.3-3.fc30 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 31 Update: python35-3.5.8-2.fc31 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 30 Update: python36-3.6.9-1.fc30 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 29 Update: python36-3.6.9-1.fc29 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 30 Update: python35-3.5.8-2.fc30 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 29 Update: python35-3.5.8-2.fc29 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 29 Update: python3-3.7.3-3.fc29 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159668 Oracle Enterprise Linux Security Update for python27:2.7 security and bug fix update (ELSA-2019-3335)
  • 296073 Oracle Solaris 11.4 Support Repository Update (SRU) 24.75.2 Missing (CPUJUL2020)
  • 296075 Oracle Solaris 11.4 Support Repository Update (SRU) 21.69.0 Missing (CPUAPR2020)
  • 296081 Oracle Solaris 11.4 Support Repository Update (SRU) 12.5.0 Missing (CPUJUL2019)
  • 377306 Alibaba Cloud Linux Security Update for python (ALINUX2-SA-2019:0094)
  • 377557 Alibaba Cloud Linux Security Update for python27:2.7 (ALINUX3-SA-2022:0112)
  • 6000046 Debian Security Update for python-urllib3 (DLA 3610-1)
  • 671062 EulerOS Security Update for python (EulerOS-SA-2019-2442)
  • 690721 Free Berkeley Software Distribution (FreeBSD) Security Update for python 3.6 (18ed9650-a1d6-11e9-9b17-fcaa147e860e)
  • 940202 AlmaLinux Security Update for python27:2.7 (ALSA-2019:3335)

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