Auth bypass in Broadcom Brocade Fabric Operating System Firmware
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.
EPSS: 0.013 (68.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support@hackerone.com (Exploit, Third Party Advisory)
- support@hackerone.com (Third Party Advisory)
- support@hackerone.com (mailing-list, Mailing List)
- support@hackerone.com (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-27538?
- CVE-2023-27538 is a medium-severity vulnerability in Broadcom Brocade Fabric Operating System Firmware, classified under Authentication Bypass by Primary Weakness. CVSS score: 5.5/10. Published 2023-03-30.
- How severe is CVE-2023-27538?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2023-27538 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.