Critical severity · published Dec 11, 2018
CVE-2018-20060
urllib3 before version 1.23 does not remove the Authorization HTTP header when following a cross-origin redirect (i.e., a redirect that differs in host, port, or scheme)
9.8
CVSS
4.5%
EPSS
No
On KEV
Description
urllib3 before version 1.23 does not remove the Authorization HTTP header when following a cross-origin redirect (i.e., a redirect that differs in host, port, or scheme). This can allow for credentials in the Authorization header to be exposed to unintended hosts or transmitted in cleartext.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.5% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
28; 29; 30 · source: NVD
UR
Urllib3 · Python
before 1.23 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-20060
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-20060
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00039.html
access.redhat.com
https://access.redhat.com/errata/RHSA-2019:2272
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1649153
Release Notes
https://github.com/urllib3/urllib3/blob/master/CHANGES.rst
Third Party Advisory
https://github.com/urllib3/urllib3/issues/1316
Third Party Advisory
https://github.com/urllib3/urllib3/pull/1346
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