Information Exposure Through Sent Data Affecting urllib3 package, versions [,1.24.2)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    EPSS
    0.1% (43rd percentile)

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  • Snyk ID SNYK-PYTHON-URLLIB3-5969479
  • published 16 Oct 2023
  • disclosed 15 Oct 2023
  • credit Unknown

How to fix?

Upgrade urllib3 to version 1.24.2 or higher.

Overview

urllib3 is a HTTP library with thread-safe connection pooling, file post, and more.

Affected versions of this package are vulnerable to Information Exposure Through Sent Data when the authorization HTTP header is not removed during a cross-origin redirect. An attacker can expose credentials in the authorisation header to unintended hosts or transmit them in cleartext by exploiting this incomplete fix for CVE-2018-20060.

Notes: This is only exploitable if a redirect differs in host, port, or scheme.

Due to the credential exposure in the authorisation header, the Confidentiality is highly impacted, but there is no proof that the Integrity is affected in any way.

CVSS Scores

version 3.1
Expand this section

Snyk

Recommended
7.4 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    Required
  • Scope (S)
    Changed
  • Confidentiality (C)
    High
  • Integrity (I)
    None
  • Availability (A)
    None
Expand this section

NVD

6.1 medium
Expand this section

Red Hat

6.1 medium