CVE-2023-27538: Broadcom Brocade Fabric Operating System Firmware

Medium severity, CVSS 5.5. EPSS: 1.2% chance of exploitation in the next 30 days.

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.

Affected products

• Broadcom Brocade Fabric Operating System Firmware: affected versions not specified
• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 36 only
• Haxx Libcurl: from 7.16.1, before 8.0.0 (fixed in 8.0.0)
• Netapp Active Iq Unified Manager: affected versions not specified
• Netapp Clustered Data Ontap: version 9.0 only
• Netapp h300s Firmware: affected versions not specified
• Netapp h410s Firmware: affected versions not specified
• Netapp h500s Firmware: affected versions not specified
• Netapp h700s Firmware: affected versions not specified
• Splunk Universal Forwarder: from 8.2.0, before 8.2.12 (fixed in 8.2.12); from 9.0.0, before 9.0.6 (fixed in 9.0.6); version 9.1.0 only

Published 2023-03-30. Last modified 2026-06-17.