Cleartext Transmission of Sensitive Information Affecting libcurl package, versions <0:7.88.0-1.amzn2.0.1


0.0
medium

Snyk CVSS

    Attack Complexity High
    User Interaction Required

    Threat Intelligence

    EPSS 0.06% (25th percentile)
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NVD
6.5 medium
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SUSE
7.4 high
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Red Hat
4.2 medium

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  • Snyk ID SNYK-AMZN2-LIBCURL-3343408
  • published 7 Mar 2023
  • disclosed 23 Feb 2023

How to fix?

Upgrade Amazon-Linux:2 libcurl to version 0:7.88.0-1.amzn2.0.1 or higher.
This issue was patched in ALAS2-2023-1986.

NVD Description

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

A cleartext transmission of sensitive information vulnerability exists in curl <v7.88.0 that could cause HSTS functionality to behave incorrectly when multiple URLs are requested in parallel. Using its HSTS support, curl can be instructed to use HTTPS instead of using an insecure clear-text HTTP step even when HTTP is provided in the URL. This HSTS mechanism would however surprisingly fail when multiple transfers are done in parallel as the HSTS cache file gets overwritten by the most recentlycompleted transfer. A later HTTP-only transfer to the earlier host name would then not get upgraded properly to HSTS.