CVE-2023-27538

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

30/03/2023

Last modified:

09/06/2025

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:haxx:libcurl::::::::	7.16.1 (including)	8.0.0 (excluding)
cpe:2.3:o:fedoraproject:fedora:36:::::::*
cpe:2.3:o:debian:debian_linux:10.0:::::::*
cpe:2.3:a:netapp:active_iq_unified_manager:-:::::vmware_vsphere::
cpe:2.3:a:netapp:clustered_data_ontap:9.0:-::::::
cpe:2.3:o:broadcom:brocade_fabric_operating_system_firmware:-:::::::*
cpe:2.3:o:netapp:h300s_firmware:-:::::::*
cpe:2.3:h:netapp:h300s:-:::::::*
cpe:2.3:o:netapp:h500s_firmware:-:::::::*
cpe:2.3:h:netapp:h500s:-:::::::*
cpe:2.3:o:netapp:h700s_firmware:-:::::::*
cpe:2.3:h:netapp:h700s:-:::::::*
cpe:2.3:o:netapp:h410s_firmware:-:::::::*
cpe:2.3:h:netapp:h410s:-:::::::*
cpe:2.3:a:splunk:universal_forwarder::::::::	8.2.0 (including)	8.2.12 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:a:haxx:libcurl::::::::	7.16.1 (including)	8.0.0 (excluding)
cpe:2.3:o:fedoraproject:fedora:36:::::::*
cpe:2.3:o:debian:debian_linux:10.0:::::::*
cpe:2.3:a:netapp:active_iq_unified_manager:-:::::vmware_vsphere::
cpe:2.3:a:netapp:clustered_data_ontap:9.0:-::::::
cpe:2.3:o:broadcom:brocade_fabric_operating_system_firmware:-:::::::*
cpe:2.3:o:netapp:h300s_firmware:-:::::::*
cpe:2.3:h:netapp:h300s:-:::::::*
cpe:2.3:o:netapp:h500s_firmware:-:::::::*
cpe:2.3:h:netapp:h500s:-:::::::*
cpe:2.3:o:netapp:h700s_firmware:-:::::::*
cpe:2.3:h:netapp:h700s:-:::::::*
cpe:2.3:o:netapp:h410s_firmware:-:::::::*
cpe:2.3:h:netapp:h410s:-:::::::*
cpe:2.3:a:splunk:universal_forwarder::::::::	8.2.0 (including)	8.2.12 (excluding)

CVE-2023-27538

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools