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Use After Free Affecting curl package, versions <0:8.2.1-1.amzn2.0.2

0.0
medium

Snyk CVSS

    Attack Complexity High
    Confidentiality High

    Threat Intelligence

    EPSS 0.14% (49th percentile)
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NVD
7.5 high
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SUSE
5.9 medium
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Red Hat
5.9 medium

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  • Snyk ID SNYK-AMZN2-CURL-5882130
  • published 6 Sep 2023
  • disclosed 26 May 2023
Report a new vulnerability Found a mistake?

Introduced: 26 May 2023

CVE-2023-28319 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 curl to version 0:8.2.1-1.amzn2.0.2 or higher.
This issue was patched in ALAS2-2023-2230.

NVD Description

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

A use after free vulnerability exists in curl <v8.1.0 in the way libcurl offers a feature to verify an SSH server's public key using a SHA 256 hash. When this check fails, libcurl would free the memory for the fingerprint before it returns an error message containing the (now freed) hash. This flaw risks inserting sensitive heap-based data into the error message that might be shown to users or otherwise get leaked and revealed.