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CVE-2019-9636

CRITICAL
9.8
CVSS Score
Published: March 8, 2019 at 09:00 PM UTC
Updated: October 14, 2026 at 07:16 AM UTC
16 products affected across 7 vendorsDebian LinuxFedoraUbuntu Linux· also runs on 1 platform

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Severity
CRITICAL9.8
Exploit prediction
EPSS 8%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
12.0414.0416.0418.0419.04
Debian Linux· Debiandrupal
95%
8.09.0
Fedora· Fedora Projectrpm
95%
28293031
Leap· openSUSEdrupal
95%
15.015.142.3
Sun Zfs Storage Appliance Kit· Oracle
95%
8.8.6
Python· Python
95%
2.7.0 ≤ v < 2.7.173.0.0 ≤ v < 3.4.103.5.0 ≤ v < 3.5.73.6.0 ≤ v < 3.6.93.7.0 ≤ v < 3.7.3
Affected range stops below 2.7.17, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.4.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.5.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.6.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.7.3, so it looks safe — our inference, not a vendor statement
Enterprise Linux· Red Hatrpm
95%
7.07.58.0
Enterprise Linux Desktop· Red Hatrubygems
95%
6.0
Enterprise Linux Eus· Red Hatrpm
95%
7.58.18.28.48.6
Enterprise Linux Server· Red Hatrubygems
95%
6.0

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

References (53)

Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00092.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00097.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00024.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00050.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00042.html
Vendor Advisoryx_refsource_SUSEMailing ListThird Party Advisory
Source: [email protected]
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/107400
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHBA-2019:0763

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-173

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