Information Exposure Affecting libcurl-devel package, versions <0:8.3.0-1.amzn2.0.5


Severity

0.0
medium
0
10

    Threat Intelligence

    EPSS
    0.07% (31st percentile)

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  • Snyk ID SNYK-AMZN2-LIBCURLDEVEL-6149019
  • published 10 Jan 2024
  • disclosed 7 Dec 2023

How to fix?

Upgrade Amazon-Linux:2 libcurl-devel to version 0:8.3.0-1.amzn2.0.5 or higher.
This issue was patched in ALAS2-2024-2385.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl-devel package and not the libcurl-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 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
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Snyk

5.3 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    None
  • Availability (A)
    None
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NVD

6.5 medium
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Red Hat

5.3 medium
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SUSE

4.2 medium