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Amazon Linux AMI: CVE-2023-27535: Security patch for curl (ALAS-2023-1727)

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Amazon Linux AMI: CVE-2023-27535: Security patch for curl (ALAS-2023-1727)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
03/21/2023
Created
05/05/2023
Added
04/21/2023
Modified
07/04/2023

Description

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.

Solution(s)

  • amazon-linux-upgrade-curl

References

  • ALAS-2023-1727
  • CVE-2023-27535

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