Authentication Bypass by Primary Weakness Affecting libcurl-minimal package, versions <0:8.0.1-1.amzn2023


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-AMZN2023-LIBCURLMINIMAL-5671400
  • published8 Jun 2023
  • disclosed30 Mar 2023

Introduced: 30 Mar 2023

CVE-2023-27538  (opens in a new tab)
CWE-305  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 libcurl-minimal to version 0:8.0.1-1.amzn2023 or higher.
This issue was patched in ALAS2023-2023-193.

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.

An authentication bypass vulnerability exists in libcurl prior to v8.0.0 where it reuses a previously established SSH connection despite the fact that an SSH option was modified, which should have prevented reuse. libcurl maintains a pool of previously used connections to reuse them for subsequent transfers if the configurations match. However, two SSH settings were omitted from the configuration check, allowing them to match easily, potentially leading to the reuse of an inappropriate connection.

CVSS Scores

version 3.1