Authentication Bypass Affecting curl package, versions [,8.0.0)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.22% (60th percentile)

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  • Snyk IDSNYK-UNMANAGED-CURL-3368137
  • published22 Mar 2023
  • disclosed20 Mar 2023
  • creditUnknown

Introduced: 20 Mar 2023

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

How to fix?

Upgrade curl to version 8.0.0 or higher.

Overview

curl is a command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET and TFTP. libcurl offers a myriad of powerful features.

Affected versions of this package are vulnerable to Authentication Bypass libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. However, several FTP settings were left out from the configuration match checks, making them match too easily. The settings in questions are CURLOPT_FTP_ACCOUNT, CURLOPT_FTP_ALTERNATIVE_TO_USER, CURLOPT_FTP_SSL_CCC and CURLOPT_USE_SSL level.

CVSS Scores

version 3.1