CVE-2020-26116 : http.client in Python 3.x before 3.5.10, 3.6.x before 3.6.12, 3.7.x before 3.7.9

http.client in Python 3.x before 3.5.10, 3.6.x before 3.6.12, 3.7.x before 3.7.9, and 3.8.x before 3.8.5 allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of HTTPConnection.request.

Published 2020-09-27 04:15:12

Updated 2023-05-24 21:15:10

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2020-26116

Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Oracle » Zfs Storage Appliance Kit » Version: 8.8
cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 12.04
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 14.04 ESM Edition
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 18.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 16.04 ESM Edition
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 31
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 32
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 33
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
Matching versions
Opensuse » Leap » Version: 15.1
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
Matching versions
Netapp » Solidfire » Version: N/A
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
Matching versions
Netapp » Hci Storage Node » Version: N/A
cpe:2.3:h:netapp:hci_storage_node:-:*:*:*:*:*:*:*
Matching versions
Python » Python
Versions from including (>=) 3.7.0 and before (<) 3.7.9
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
Matching versions
Python » Python
Versions from including (>=) 3.0.0 and before (<) 3.5.10
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
Matching versions
Python » Python
Versions from including (>=) 3.6.0 and before (<) 3.6.12
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
Matching versions
Python » Python
Versions from including (>=) 3.8.0 and before (<) 3.8.5
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2020-26116

Top countries where our scanners detected CVE-2020-26116

Top open port discovered on systems with this issue 80

IPs affected by CVE-2020-26116 316,605

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2020-26116!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2020-26116

EPSS FAQ

0.20%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 58 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-26116

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.4	MEDIUM	AV:N/AC:L/Au:N/C:P/I:P/A:N	10.0	4.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: None
7.2	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N	3.9	2.7	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: Low Integrity: Low Availability: None

CWE ids for CVE-2020-26116

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-26116

http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00027.html

[security-announce] openSUSE-SU-2020:1859-1: moderate: Security update f
Mailing List;Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HDQ2THWU4GPV4Y5H5WW5PFMSWXL2CRFD/

[SECURITY] Fedora 31 Update: python2-2.7.18-6.fc31 - package-announce - Fedora Mailing-Lists
Mailing List;Third Party Advisory
https://python-security.readthedocs.io/vuln/http-header-injection-method.html

http.client: HTTP Header Injection in the HTTP method — Python Security 0.0 documentation
Patch;Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html

[SECURITY] [DLA 3432-1] python2.7 security update

CVEs referencing this url
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QOX7DGMMWWL6POCRYGAUCISOLR2IG3XV/

[SECURITY] Fedora 32 Update: mingw-python3-3.8.3-7.fc32 - package-announce - Fedora Mailing-Lists
Mailing List;Third Party Advisory
https://security.netapp.com/advisory/ntap-20201023-0001/

CVE-2020-26116 Python Vulnerability in NetApp Products | NetApp Product Security
Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BW4GCLQISJCOEGQNIMVUZDQMIY6RR6CC/

[SECURITY] Fedora 33 Update: python2.7-2.7.18-6.fc33 - package-announce - Fedora Mailing-Lists
Third Party Advisory
https://usn.ubuntu.com/4581-1/

USN-4581-1: Python vulnerability | Ubuntu security notices | Ubuntu
Third Party Advisory
https://bugs.python.org/issue39603

Issue 39603: [security] http.client: HTTP Header Injection in the HTTP method - Python tracker
Exploit;Issue Tracking;Patch;Vendor Advisory

CVEs referencing this url
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JWMAVY4T4257AZHTF2RZJKNJNSJFY24O/

[SECURITY] Fedora 32 Update: python27-2.7.18-6.fc32 - package-announce - Fedora Mailing-Lists
Mailing List;Third Party Advisory
https://security.gentoo.org/glsa/202101-18

Python: Multiple vulnerabilities (GLSA 202101-18) — Gentoo security
Third Party Advisory

CVEs referencing this url
https://www.oracle.com/security-alerts/cpuoct2021.html

Oracle Critical Patch Update Advisory - October 2021
Patch;Third Party Advisory

CVEs referencing this url
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OXI72HIHMXCQFWTULUXDG7VDA2BCYL4Y/

[SECURITY] Fedora 32 Update: python34-3.4.10-11.fc32 - package-announce - Fedora Mailing-Lists
Mailing List;Third Party Advisory

CVEs referencing this url
https://lists.debian.org/debian-lts-announce/2020/11/msg00032.html

[SECURITY] [DLA 2456-1] python3.5 security update
Mailing List;Third Party Advisory

CVEs referencing this url