CVE-2019-9636

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.

9.8

CVSS

Severity: Critical

CVSS 3.1 •

CVSS 2.0 •

EPSS 5.63% Top 15%

Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory gentoo.org Vendor Advisory python.org

Affected: n/a n/a

References

Link	Tags
http://www.securityfocus.com/bid/107400	third party advisory vdb entry
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L25RTMKCF62DLC2XVSNXGX7C7HXISLVM/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JSKPGPZQNTAULHW4UH63KGOOUIDE4RRB/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D3LXPABKVLFYUHRYJPM3CSS5MS6FXKS7/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AEZ5IQT7OF7Q2NCGIVABOWYGKO7YU3NJ/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ICBEGRHIPHWPG2VGYS6R4EVKVUUF4AQW/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TR6GCO3WTV4D5L23WTCBF275VE6BVNI3/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/46PVWY5LFP4BRPG3BVQ5QEEFYBVEXHCK/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CFBAAGM27H73OLYBUA2IAZFSUN6KGLME/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IFAXBEY2TGOBDRKTR556JBXBVFSAKD6I/	vendor advisory
https://access.redhat.com/errata/RHSA-2019:0710	third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:0765	third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:0806	third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00092.html	vendor advisory mailing list third party advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00097.html	vendor advisory mailing list third party advisory
https://access.redhat.com/errata/RHSA-2019:0902	third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:0981	third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:0997	third party advisory vendor advisory
https://access.redhat.com/errata/RHBA-2019:0959	third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00024.html	vendor advisory mailing list third party advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JXASHCDD4PQFKTMKQN4YOP5ZH366ABN4/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JMWSKTNOHSUOT3L25QFJAVCFYZX46FYK/	vendor advisory
https://access.redhat.com/errata/RHSA-2019:1467	third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00050.html	vendor advisory mailing list third party advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html	third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html	third party advisory mailing list
https://access.redhat.com/errata/RHBA-2019:0764	third party advisory vendor advisory
https://access.redhat.com/errata/RHBA-2019:0763	third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/44TS66GJMO5H3RLMVZEBGEFTB6O2LJJU/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ORNTF62QPLMJXIQ7KTZQ2776LMIXEKL/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KRYFIMISZ47NTAU3XWZUOFB7CYL62KES/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HQEQLXLOCR3SNM3AA5RRYJFQ5AZBYJ4L/	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00042.html	vendor advisory mailing list third party advisory
https://usn.ubuntu.com/4127-2/	third party advisory vendor advisory
https://usn.ubuntu.com/4127-1/	third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ER6LONC2B2WYIO56GBQUDU6QTWZDPUNQ/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E2HP37NUVLQSBW3J735A2DQDOZ4ZGBLY/	vendor advisory
https://access.redhat.com/errata/RHSA-2019:2980	third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2019:3170	third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M34WOYCDKTDE5KLUACE2YIEH7D37KHRX/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JCPGLTTOBB3QEARDX4JOYURP6ELNNA2V/	vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html	vendor advisory mailing list third party advisory
https://security.gentoo.org/glsa/202003-26	third party advisory vendor advisory
https://www.oracle.com/security-alerts/cpujan2020.html	third party advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html	third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html	third party advisory mailing list
https://www.oracle.com/security-alerts/cpujul2022.html
https://github.com/python/cpython/pull/12201	third party advisory patch
https://python-security.readthedocs.io/vuln/urlsplit-nfkc-normalization.html	third party advisory patch
https://bugs.python.org/issue36216	patch vendor advisory issue tracking
https://security.netapp.com/advisory/ntap-20190517-0001/	third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-9636?: CVE-2019-9636 has been scored as a critical severity vulnerability.
How to fix CVE-2019-9636?: To fix CVE-2019-9636, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-9636 being actively exploited in the wild?: It is possible that CVE-2019-9636 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~6% probability that this vulnerability will be exploited by malicious actors in the next 30 days.