CVE-2019-9636

high-risk
Published 2019-03-08

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.

Do I need to act?

!
11.5% chance of exploitation in next 30 days
EPSS score — higher than 89% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Debian Redhat Oracle Python Canonical Fedoraproject Opensuse

References (104)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00092.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00097.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00024.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00050.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00042.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
Third Party Advisory http://www.securityfocus.com/bid/107400
Third Party Advisory https://access.redhat.com/errata/RHBA-2019:0763
Third Party Advisory https://access.redhat.com/errata/RHBA-2019:0764
Third Party Advisory https://access.redhat.com/errata/RHBA-2019:0959
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0710
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0765
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0806
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0902
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0981
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:0997
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:1467
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:2980
Third Party Advisory https://access.redhat.com/errata/RHSA-2019:3170
Issue Tracking https://bugs.python.org/issue36216
and 84 more references
66
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 11/34 · Low
Exposure 23/34 · High