Use After Free Affecting libcurl-minimal package, versions <0:8.0.1-1.amzn2023.0.1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.28% (70th percentile)

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  • Snyk IDSNYK-AMZN2023-LIBCURLMINIMAL-5807908
  • published27 Jul 2023
  • disclosed26 May 2023

Introduced: 26 May 2023

CVE-2023-28319  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 libcurl-minimal to version 0:8.0.1-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2023-270.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl-minimal package and not the libcurl-minimal package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 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.

CVSS Scores

version 3.1