CVE-2019-9636
CRITICALCVSS 9.8/10EPSS 8.81%
Last modified
CVE-2019-9636 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by: Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. EPSS estimates a 8.81% chance of exploitation in the next 30 days.
Description
Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by: Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. that are cached against a given hostname). The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.7, 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; v3.7.3, v3.7.3rc1, 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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Python | Python | >= 2.7.0, < 2.7.17 |
| Python | Python | >= 3.0.0, < 3.4.10 |
| Python | Python | >= 3.5.0, < 3.5.7 |
| Python | Python | >= 3.6.0, < 3.6.9 |
| Python | Python | >= 3.7.0, < 3.7.3 |
| Fedoraproject | Fedora | 28 |
| Fedoraproject | Fedora | 29 |
| Fedoraproject | Fedora | 30 |
| Fedoraproject | Fedora | 31 |
| Opensuse | Leap | 15.0 |
| Opensuse | Leap | 15.1 |
| Opensuse | Leap | 42.3 |
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Canonical | Ubuntu Linux | 12.04 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Canonical | Ubuntu Linux | 19.04 |
| Redhat | Openshift Container Platform | 3.11 |
| Redhat | Enterprise Linux | 7.5 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux Desktop | 6.0 |
| Redhat | Enterprise Linux Eus | 7.5 |
| Redhat | Enterprise Linux Eus | 8.1 |
| Redhat | Enterprise Linux Eus | 8.2 |
| Redhat | Enterprise Linux Eus | 8.4 |
| Redhat | Enterprise Linux Eus | 8.6 |
| Redhat | Enterprise Linux Server | 6.0 |
| Redhat | Enterprise Linux Server Aus | 7.4 |
| Redhat | Enterprise Linux Server Aus | 8.2 |
| Redhat | Enterprise Linux Server Aus | 8.4 |
| Redhat | Enterprise Linux Server Eus | 5.6 |
| Redhat | Enterprise Linux Server Tus | 7.4 |
| Redhat | Enterprise Linux Server Tus | 8.2 |
| Redhat | Enterprise Linux Server Tus | 8.4 |
| Redhat | Enterprise Linux Server Tus | 8.6 |
| Redhat | Enterprise Linux Workstation | 6.0 |
| Redhat | Virtualization | 4.0 |
| Oracle | Sun Zfs Storage Appliance Kit | 8.8.6 |
References
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00092.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00097.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00024.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00050.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00042.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.htmlMailing List, Third Party Advisory
- http://www.securityfocus.com/bid/107400Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHBA-2019:0763Third Party Advisory
- https://access.redhat.com/errata/RHBA-2019:0764Third Party Advisory
- https://access.redhat.com/errata/RHBA-2019:0959Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0710Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0765Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0806Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0902Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0981Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0997Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1467Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2980Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3170Third Party Advisory
- https://bugs.python.org/issue36216Issue Tracking, Patch, Vendor Advisory
- https://github.com/python/cpython/pull/12201Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/06/msg00022.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/06/msg00023.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00011.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00034.htmlMailing List, Third Party Advisory
- https://python-security.readthedocs.io/vuln/urlsplit-nfkc-normalization.htmlPatch, Third Party Advisory
- https://security.gentoo.org/glsa/202003-26Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190517-0001/Third Party Advisory
- https://usn.ubuntu.com/4127-1/Third Party Advisory
- https://usn.ubuntu.com/4127-2/Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2020.htmlThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00092.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00097.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00024.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00050.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00042.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.htmlMailing List, Third Party Advisory
- http://www.securityfocus.com/bid/107400Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHBA-2019:0763Third Party Advisory
- https://access.redhat.com/errata/RHBA-2019:0764Third Party Advisory
- https://access.redhat.com/errata/RHBA-2019:0959Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0710Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0765Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0806Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0902Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0981Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:0997Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1467Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2980Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3170Third Party Advisory
- https://bugs.python.org/issue36216Issue Tracking, Patch, Vendor Advisory
- https://github.com/python/cpython/pull/12201Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/06/msg00022.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/06/msg00023.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00011.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00034.htmlMailing List, Third Party Advisory
- https://python-security.readthedocs.io/vuln/urlsplit-nfkc-normalization.htmlPatch, Third Party Advisory
- https://security.gentoo.org/glsa/202003-26Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190517-0001/Third Party Advisory
- https://usn.ubuntu.com/4127-1/Third Party Advisory
- https://usn.ubuntu.com/4127-2/Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2020.htmlThird Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-9636?
Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by: Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. that are cached against a given hostname). The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.7, 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; v3.7.3, v3.7.3rc1, 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.
How severe is CVE-2019-9636?
CVE-2019-9636 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 8.81% probability of exploitation in the next 30 days.
How do I fix CVE-2019-9636?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2019-9636?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST