An authentication bypass vulnerability exists in libcurl prior to v8.0.0 where it reuses a previously established SSH connection despite the fact that an SSH option was modified, which should have prevented reuse. libcurl maintains a pool of previously used connections to reuse them for subsequent transfers if the configurations match. However, two SSH settings were omitted from the configuration check, allowing them to match easily, potentially leading to the reuse of an inappropriate connection.
History

Mon, 09 Jun 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published: 2023-03-30T00:00:00.000Z

Updated: 2025-06-09T14:52:08.739Z

Reserved: 2023-03-02T00:00:00.000Z

Link: CVE-2023-27538

cve-icon Vulnrichment

Updated: 2024-08-02T12:16:35.616Z

cve-icon NVD

Status : Modified

Published: 2023-03-30T20:15:07.677

Modified: 2025-06-09T15:15:29.150

Link: CVE-2023-27538

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-03-20T00:00:00Z

Links: CVE-2023-27538 - Bugzilla