Vulnerability Description
An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse previously established connections with incorrect user permissions due to a failure to check for changes in the CURLOPT_GSSAPI_DELEGATION option. This vulnerability affects krb5/kerberos/negotiate/GSSAPI transfers and could potentially result in unauthorized access to sensitive information. The safest option is to not reuse connections if the CURLOPT_GSSAPI_DELEGATION option has been changed.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Haxx | Libcurl | >= 7.22.0, <= 7.88.1 |
| Fedoraproject | Fedora | 36 |
| Debian | Debian Linux | 10.0 |
| Netapp | Active Iq Unified Manager | - |
| Netapp | H300S Firmware | - |
| Netapp | H300S | - |
| Netapp | H500S Firmware | - |
| Netapp | H500S | - |
| Netapp | H700S Firmware | - |
| Netapp | H700S | - |
| Netapp | H410S Firmware | - |
| Netapp | H410S | - |
| Netapp | Ontap | 9 |
| Splunk | Universal Forwarder | >= 8.2.0, < 8.2.12 |
Related Weaknesses (CWE)
References
- https://hackerone.com/reports/1895135ExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00025.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202310-12Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230420-0010/Third Party Advisory
- https://hackerone.com/reports/1895135ExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00025.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202310-12Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230420-0010/Third Party Advisory
FAQ
What is CVE-2023-27536?
CVE-2023-27536 is a vulnerability with a CVSS score of 5.9 (MEDIUM). An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse previously established connections with incorrect user permissions due to a failure to chec...
How severe is CVE-2023-27536?
CVE-2023-27536 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-27536?
Check the references section above for vendor advisories and patch information. Affected products include: Haxx Libcurl, Fedoraproject Fedora, Debian Debian Linux, Netapp Active Iq Unified Manager, Netapp H300S Firmware.