CVE-2023-46218 Affecting curl package, versions <7.81.0-1ubuntu1.15


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.09% (39th percentile)

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  • Snyk IDSNYK-UBUNTU2204-CURL-6101793
  • published6 Dec 2023
  • disclosed7 Dec 2023

Introduced: 6 Dec 2023

CVE-2023-46218  (opens in a new tab)

How to fix?

Upgrade Ubuntu:22.04 curl to version 7.81.0-1ubuntu1.15 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Ubuntu. See How to fix? for Ubuntu:22.04 relevant fixed versions and status.

This flaw allows a malicious HTTP server to set "super cookies" in curl that are then passed back to more origins than what is otherwise allowed or possible. This allows a site to set cookies that then would get sent to different and unrelated sites and domains.

It could do this by exploiting a mixed case flaw in curl's function that verifies a given cookie domain against the Public Suffix List (PSL). For example a cookie could be set with domain=co.UK when the URL used a lower case hostname curl.co.uk, even though co.uk is listed as a PSL domain.

CVSS Scores

version 3.1