CVE-2018-25091

Description

urllib3 before 1.24.2 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. NOTE: this issue exists because of an incomplete fix for CVE-2018-20060 (which was case-sensitive).

How to fix CVE-2018-25091

To remediate CVE-2018-25091, upgrade the affected package to a fixed version below.

• —upgrade to 1.25.6-4 or later
• —upgrade to 1.24.1-1+deb10u1 or later
• —upgrade to 1.24.2 or later
• —upgrade to adb358f8e06865406d1f05e581a16cbea2136fbc or later

Is CVE-2018-25091 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (4)

• from 0, < 1.25.6-4
• from 0, < 1.24.1-1+deb10u1
• from 0, < 1.24.2
• from 0, < adb358f8e06865406d1f05e581a16cbea2136fbc | from 0, < 1.24.2

CVSS scores

References (8)

• ADVISORYgithub.com/advisories/GHSA-gwvm-45gx-3cf8
• ADVISORYnvd.nist.gov/vuln/detail/CVE-2018-25091
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2018-25091
• PATCHgithub.com/urllib3/urllib3
• WEB