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CVE-2018-25091

Published: 15 October 2023

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).

Notes

AuthorNote
mdeslaur
On focal and earlier, the python-pip package bundles
python-urllib3 binaries when built. After updating
python-urllib3, a no-change rebuild of python-pip is required.
On jammy and later, python-urllib3 is bundled in the python-pip
package and needs to be patched.
sbeattie
According to Debian, this issue exists because of an
incomplete fix for CVE-2018-20060 (which was case-sensitive)

Priority

Medium

Cvss 3 Severity Score

6.1

Score breakdown

Status

Package Release Status
python-pip
Launchpad, Ubuntu, Debian
bionic
Released (9.0.1-2.3~ubuntu1.18.04.8+esm2)
Available with Ubuntu Pro
focal
Released (20.0.2-5ubuntu1.10)
jammy
Released (22.0.2+dfsg-1ubuntu0.4)
lunar
Released (23.0.1+dfsg-1ubuntu0.2)
mantic
Released (23.2+dfsg-1ubuntu0.1)
trusty Needs triage

upstream Needs triage

xenial
Released (8.1.1-2ubuntu0.6+esm6)
Available with Ubuntu Pro
python-urllib3
Launchpad, Ubuntu, Debian
bionic
Released (1.22-1ubuntu0.18.04.2+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
focal Not vulnerable
(1.25.8-2ubuntu0.2)
jammy Not vulnerable

lunar Not vulnerable

mantic Not vulnerable

trusty Needs triage

upstream
Released (1.25.6-4)
xenial
Released (1.13.1-2ubuntu0.16.04.4+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)

Severity score breakdown

Parameter Value
Base score 6.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N