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.). This is fixed in: v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1; v3.6.11, v3.6.11rc1, v3.6.12; v3.7.8, v3.7.8rc1, v3.7.9; v3.8.3, v3.8.3rc1, v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1.
CVSS Details
- CVSS 3.1 Base Score: 6.1
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade python2Upgrade python2-tkinter | Oct 1, 2024 | Oct 23, 2019 |
| Amazon_linux | — | Upgrade python35Upgrade python36Upgrade python26Upgrade python27Upgrade python36Upgrade python34Upgrade python34 | Sep 1, 2020 | Oct 23, 2019 |
| Debian | — | Upgrade python2.7 | Jul 16, 2020 | Oct 23, 2019 |
| F5 Big Ip | — | Update F5 BIG-IP to the latest version | Jun 17, 2026 | Aug 21, 2025 |
| Freebsd | — | Upgrade python36Upgrade python35Upgrade python27Upgrade python37Upgrade python38 | Sep 20, 2020 | Sep 20, 2020 |
| Oracle Solaris | — | Upgrade runtime/python-34 to version 3.4.10-11.4.21.0.1.69.0 on Solaris 11.4Upgrade library/python/tkinter-35 to version 3.5.9-11.4.21.0.1.69.0 on Solaris 11.4Upgrade runtime/python-27 to version 2.7.18-11.4.24.0.1.75.1 on Solaris 11.4Upgrade runtime/python-27/tests to version 2.7.18-11.4.24.0.1.75.1 on Solaris 11.4Upgrade library/python/tkinter-27 to version 2.7.18-11.4.24.0.1.75.1 on Solaris 11.4Upgrade library/python/tkinter-34 to version 3.4.10-11.4.21.0.1.69.0 on Solaris 11.4Upgrade library/python/tkinter-37 to version 3.7.5-11.4.24.0.1.75.1 on Solaris 11.4Upgrade runtime/python-37 to version 3.7.5-11.4.24.0.1.75.1 on Solaris 11.4Upgrade runtime/python-35 to version 3.5.9-11.4.21.0.1.69.0 on Solaris 11.4 | Jan 19, 2021 | Oct 23, 2019 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Oct 23, 2019 |
| Suse | — | Upgrade python-xmlUpgrade python3-base-32bitUpgrade python3-docUpgrade python3-toolsUpgrade python3Upgrade python3-cursesUpgrade python3-testsuiteUpgrade python-demoUpgrade python3-tkUpgrade libpython3_4m1_0Upgrade libpython3_6m1_0-32bitUpgrade python-tkUpgrade python3-32bitUpgrade python-rpm-macrosUpgrade python-develUpgrade python36-baseUpgrade python-cursesUpgrade shared-python-startupUpgrade libpython3_4m1_0-32bitUpgrade libpython3_6m1_0Upgrade pythonUpgrade python3-develUpgrade libpython2_7-1_0-32bitUpgrade python-idleUpgrade python3-idleUpgrade python36Upgrade python-gdbmUpgrade libpython2_7-1_0Upgrade python-docUpgrade python3-doc-devhelpUpgrade python-32bitUpgrade python-doc-pdfUpgrade python3-dbmUpgrade python-base-32bitUpgrade python3-baseUpgrade python-base | Mar 24, 2020 | Oct 23, 2019 |
| Ubuntu | — | Upgrade python3.4 (Ubuntu Pro)Upgrade python3.7 (Ubuntu Pro)Upgrade python3.6Upgrade python3.6 (Ubuntu Pro)Upgrade python2.7 (Ubuntu Pro)Upgrade python3.5-minimal (Ubuntu Pro)Upgrade python3.8 (Ubuntu Pro)Upgrade python3.8Upgrade python3.6-minimalUpgrade python3.7Upgrade python3.8-minimalUpgrade python3.5 (Ubuntu Pro)Upgrade python3.5-minimalUpgrade python3.6-minimal (Ubuntu Pro)Upgrade python3.4-minimal (Ubuntu Pro)Upgrade python3.5Upgrade python3.7-minimal (Ubuntu Pro)Upgrade python2.7-minimalUpgrade python2.7Upgrade python3.7-minimalUpgrade python3.8-minimal (Ubuntu Pro)Upgrade python2.7-minimal (Ubuntu Pro) | Apr 22, 2020 | Oct 23, 2019 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Oct 23, 2019 |
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