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Authentication Bypass by Primary Weakness The advisory has been revoked - it doesn't affect any version of package curl  (opens in a new tab)

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EPSS
0.07% (23rd percentile)

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  • Snyk IDSNYK-RHEL10-CURL-9837996
  • published28 Apr 2025
  • disclosed20 Mar 2023
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Introduced: 20 Mar 2023

CVE-2023-27535  (opens in a new tab)
CWE-305  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by RHEL.

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.