VULNERABILITY INTELLIGENCE

CVE-2023-27538

CVSS score5.5 MEDIUM
EPSS probability1.45%
CISA KEVNot currently listed
Published2023-03-30
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Description

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.

Weakness classification

  • support@hackerone.com: CWE-305
  • nvd@nist.gov: CWE-287

Primary references