IM
IronMonkey Threat Research

CVE-2023-27535 MEDIUM

Published: 2023-03-30 | Last Modified: 2025-06-09 | Status: Modified

Description

An authentication bypass vulnerability exists in libcurl <8.0.0 in the FTP connection reuse feature that can result in wrong credentials being used during subsequent transfers. Previously created connections are kept in a connection pool for reuse if they match the current setup. However, certain FTP settings such as CURLOPT_FTP_ACCOUNT, CURLOPT_FTP_ALTERNATIVE_TO_USER, CURLOPT_FTP_SSL_CCC, and CURLOPT_USE_SSL were not included in the configuration match checks, causing them to match too easily. This could lead to libcurl using the wrong credentials when performing a transfer, potentially allowing unauthorized access to sensitive information.

CVSS Metrics

Base Score: 5.9 (MEDIUM)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack VectorNETWORK
Attack ComplexityHIGH
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
Confidentiality ImpactHIGH
Integrity ImpactNONE
Availability ImpactNONE

Source: [email protected]

Type: Primary

Exploitability Score: 2.2

Impact Score: 3.6

Weaknesses

Source Type Description
[email protected] Secondary
en CWE-305
[email protected] Primary
en CWE-287

Affected Products

Vendor Product Version Update Type
haxx libcurl * <built-in method update of dict object at 0x7fd36b259900> Application
fedoraproject fedora 36 <built-in method update of dict object at 0x7fd36b259b80> Operating System
debian debian_linux 10.0 <built-in method update of dict object at 0x7fd37034ac80> Operating System
netapp active_iq_unified_manager - <built-in method update of dict object at 0x7fd2dbe94440> Application
netapp ontap_9 - <built-in method update of dict object at 0x7fd36b258500> Application
netapp h300s_firmware - <built-in method update of dict object at 0x7fd36b25ac00> Operating System
netapp h500s_firmware - <built-in method update of dict object at 0x7fd36a76f980> Operating System
netapp h700s_firmware - <built-in method update of dict object at 0x7fd36b25b540> Operating System
netapp h410s_firmware - <built-in method update of dict object at 0x7fd3094e7b80> Operating System
splunk universal_forwarder * <built-in method update of dict object at 0x7fd36b25b580> Application
splunk universal_forwarder * <built-in method update of dict object at 0x7fd2dbe94240> Application
splunk universal_forwarder 9.1.0 <built-in method update of dict object at 0x7fd36b258400> Application

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
Yes cpe:2.3:a:netapp:ontap_9:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
No cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*
Yes cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*
Yes cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*

References