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
0.23% (63rd percentile)

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  • Snyk IDSNYK-AMZN2023-LIBCURLMINIMAL-5671368
  • published8 Jun 2023
  • disclosed30 Mar 2023

Introduced: 30 Mar 2023

CVE-2023-27535  (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 <8.0.0 in the FTP connection reuse feature that can result in wrong credentials being used during subsequent transfers. Previously created connections are kept in a connection pool for reuse if they match the current setup. However, certain FTP settings such as CURLOPT_FTP_ACCOUNT, CURLOPT_FTP_ALTERNATIVE_TO_USER, CURLOPT_FTP_SSL_CCC, and CURLOPT_USE_SSL were not included in the configuration match checks, causing them to match too easily. This could lead to libcurl using the wrong credentials when performing a transfer, potentially allowing unauthorized access to sensitive information.

CVSS Scores

version 3.1