Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Haxx | Libcurl | >= 7.16.1, < 8.0.0 |
| Fedoraproject | Fedora | 36 |
| Debian | Debian Linux | 10.0 |
| Netapp | Active Iq Unified Manager | - |
| Netapp | Clustered Data Ontap | 9.0 |
| Broadcom | Brocade Fabric Operating System Firmware | - |
| Netapp | H300S Firmware | - |
| Netapp | H300S | - |
| Netapp | H500S Firmware | - |
| Netapp | H500S | - |
| Netapp | H700S Firmware | - |
| Netapp | H700S | - |
| Netapp | H410S Firmware | - |
| Netapp | H410S | - |
| Splunk | Universal Forwarder | >= 8.2.0, < 8.2.12 |
Related Weaknesses (CWE)
References
- https://hackerone.com/reports/1898475ExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00025.htmlMailing List
- https://security.gentoo.org/glsa/202310-12Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230420-0010/Third Party Advisory
- https://hackerone.com/reports/1898475ExploitThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/04/msg00025.htmlMailing List
- https://security.gentoo.org/glsa/202310-12Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230420-0010/Third Party Advisory
FAQ
What is CVE-2023-27538?
CVE-2023-27538 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 pre...
How severe is CVE-2023-27538?
CVE-2023-27538 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-27538?
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 Clustered Data Ontap.