CVE-2023-27538

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.
Configurations

Configuration 1 (hide)

cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Configuration 4 (hide)

OR cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
cpe:2.3:o:broadcom:brocade_fabric_operating_system_firmware:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:clustered_data_ontap:9.0:-:*:*:*:*:*:*

Configuration 5 (hide)

AND
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*

Configuration 6 (hide)

AND
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*

Configuration 7 (hide)

AND
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*

Configuration 8 (hide)

AND
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*

Configuration 9 (hide)

OR cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*
cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*
cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*

History

09 Jun 2025, 15:15

Type Values Removed Values Added
References (MISC) https://hackerone.com/reports/1898475 - Exploit, Third Party Advisory () https://hackerone.com/reports/1898475 - Exploit, Third Party Advisory
References (GENTOO) https://security.gentoo.org/glsa/202310-12 - Third Party Advisory () https://security.gentoo.org/glsa/202310-12 - Third Party Advisory
References (MLIST) https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html - Mailing List () https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html - Mailing List
References (CONFIRM) https://security.netapp.com/advisory/ntap-20230420-0010/ - Third Party Advisory () https://security.netapp.com/advisory/ntap-20230420-0010/ - Third Party Advisory

27 Mar 2024, 14:46

Type Values Removed Values Added
First Time Splunk
Splunk universal Forwarder
CPE cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*
cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*

20 Oct 2023, 18:43

Type Values Removed Values Added
CPE cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:a:netapp:clustered_data_ontap:9.0:-:*:*:*:*:*:*
cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*
cpe:2.3:o:broadcom:brocade_fabric_operating_system_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*
First Time Broadcom
Netapp active Iq Unified Manager
Netapp clustered Data Ontap
Netapp h500s
Debian
Netapp h700s Firmware
Netapp h410s Firmware
Netapp h300s
Debian debian Linux
Netapp h410s
Broadcom brocade Fabric Operating System Firmware
Netapp h700s
Netapp
Netapp h300s Firmware
Netapp h500s Firmware
References (CONFIRM) https://security.netapp.com/advisory/ntap-20230420-0010/ - (CONFIRM) https://security.netapp.com/advisory/ntap-20230420-0010/ - Third Party Advisory
References (GENTOO) https://security.gentoo.org/glsa/202310-12 - (GENTOO) https://security.gentoo.org/glsa/202310-12 - Third Party Advisory
References (MLIST) https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html - (MLIST) https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html - Mailing List

11 Oct 2023, 11:15

Type Values Removed Values Added
References
  • (GENTOO) https://security.gentoo.org/glsa/202310-12 -

21 Apr 2023, 23:15

Type Values Removed Values Added
References
  • (MLIST) https://lists.debian.org/debian-lts-announce/2023/04/msg00025.html -

20 Apr 2023, 09:15

Type Values Removed Values Added
References
  • (CONFIRM) https://security.netapp.com/advisory/ntap-20230420-0010/ -

19 Apr 2023, 20:15

Type Values Removed Values Added
References
  • {'url': 'https://curl.se/docs/CVE-2023-27538.html', 'name': 'https://curl.se/docs/CVE-2023-27538.html', 'tags': [], 'refsource': 'CONFIRM'}
  • {'url': 'https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/', 'name': 'FEDORA-2023-7e7414e64d', 'tags': ['Mailing List', 'Third Party Advisory'], 'refsource': 'FEDORA'}
Summary An authentication bypass vulnerability exists in libcurl 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. 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.

14 Apr 2023, 00:15

Type Values Removed Values Added
References
  • (CONFIRM) https://curl.se/docs/CVE-2023-27538.html -

10 Apr 2023, 16:36

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown
v2 : unknown
v3 : 5.5
CWE CWE-287
References (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/ - Mailing List, Third Party Advisory
References (MISC) https://hackerone.com/reports/1898475 - (MISC) https://hackerone.com/reports/1898475 - Exploit, Third Party Advisory
CPE cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
First Time Haxx
Fedoraproject fedora
Haxx libcurl
Fedoraproject

09 Apr 2023, 04:16

Type Values Removed Values Added
References
  • (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/36NBD5YLJXXEDZLDGNFCERWRYJQ6LAQW/ -

Information

Published : 2023-03-30 20:15

Updated : 2025-06-09 15:15


NVD link : CVE-2023-27538

Mitre link : CVE-2023-27538


JSON object : View

Products Affected

debian

  • debian_linux

netapp

  • h500s
  • h410s
  • clustered_data_ontap
  • h300s
  • h700s_firmware
  • h500s_firmware
  • h410s_firmware
  • h700s
  • active_iq_unified_manager
  • h300s_firmware

fedoraproject

  • fedora

haxx

  • libcurl

splunk

  • universal_forwarder

broadcom

  • brocade_fabric_operating_system_firmware
CWE
CWE-287

Improper Authentication