Improper Authentication Affecting curl package, versions <8.0.1-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.22% (60th percentile)

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  • Snyk IDSNYK-ALPINE315-CURL-5422120
  • published20 Mar 2023
  • disclosed30 Mar 2023

Introduced: 20 Mar 2023

CVE-2023-27535  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade Alpine:3.15 curl to version 8.0.1-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Alpine. See How to fix? for Alpine:3.15 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