CVE-2023-27535

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.

Affected products

Alt Linux, Almalinux, Astra Linux, Centos, Ibm Aix, Linuxmint, Red Hat, Red Os

Haxx Libcurl

≤ 7.88.1

CVSS 3.1

5.9 MEDIUM

EPSS

1.6% (73th percentile)

Weakness

CWE-287, CWE-305

NVD status

Modified

Published

2023-03-30

No exploit for CVE-2023-27535 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.