CVE-2019-9636

Impact:
Important
Public Date:
2019-03-06
CWE:
CWE-172
Bugzilla:
1688543: CVE-2019-9636 python: Information Disclosure due to urlsplit improper NFKC normalization
It was discovered that python's functions urllib.parse.urlsplit and urllib.parse.urlparse do not properly handle URLs encoded with Punycode/Internationalizing Domain Names in Applications (IDNA), which may result in a wrong domain name (specifically the netloc component of URL - user@domain:port) being returned by those functions. When an application parses user-supplied URLs to store cookies, authentication credentials, or other kind of information, it is possible for an attacker to provide specially crafted URLs to make the application locate host-related information (e.g. cookies, authentication data) and send them to a different host than where it should, unlike if the URLs had been correctly parsed. The result of an attack may vary based on the application.

Find out more about CVE-2019-9636 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v3 metrics

CVSS3 Base Score 9.8
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Red Hat Security Errata

Platform Errata Release Date
Red Hat Software Collections for Red Hat Enterprise Linux 7 (rh-python35-python) RHSA-2019:0902 2019-04-30
Red Hat Enterprise Linux 7 (python) RHSA-2019:0710 2019-04-08
Red Hat Software Collections for Red Hat Enterprise Linux 6 (rh-python35-python) RHSA-2019:0902 2019-04-30
Red Hat Enterprise Linux 8 (python3) RHSA-2019:0997 2019-05-07
Red Hat Enterprise Linux 6 (python) RHSA-2019:1467 2019-06-13
Red Hat Software Collections for Red Hat Enterprise Linux 6 (rh-python36-python) RHSA-2019:0765 2019-04-16
Red Hat Software Collections for Red Hat Enterprise Linux 7 (rh-python36-python) RHSA-2019:0765 2019-04-16
Red Hat Software Collections for Red Hat Enterprise Linux 6 (python27-python) RHSA-2019:0806 2019-04-23
Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts (rhvm-appliance) RHBA-2019:0764 2019-04-16
Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts (redhat-virtualization-host) RHBA-2019:0763 2019-04-16
Red Hat Enterprise Linux 8 (python27:2.7) RHSA-2019:0981 2019-05-07
Red Hat Software Collections for Red Hat Enterprise Linux 7 (python27-python) RHSA-2019:0806 2019-04-23

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 8 python36:3.6/python36 Not affected
Red Hat Enterprise Linux 7 python3 Not affected
Red Hat Enterprise Linux 5 python Out of support scope
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.

External References

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