Auth bypass in Broadcom Fabric Operating System
CVE-2021-27793
ntermittent authorization failure in aaa tacacs+ with Brocade Fabric OS versions before Brocade Fabric OS v9.0.1b and after 9.0.0, also in Brocade Fabric OS before Brocade Fabric OS v8.2.3a and after v8.2.0 could cause a user with a valid account to be unable to log into the switch.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.009 (58.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Broadcom Fabric Operating System — versions 8.2.3, 9.0.1, 9.0.1a
- Brocade Fabric OS — versions Versions before Brocade Fabric OS v9.0.1b and after 9.0.0, also before Brocade Fabric OS v8.2.3a and after v8.2.0
Weakness classification (CWE)
References
- www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-s… (Vendor Advisory)
- security.netapp.com/advisory/ntap-20210819-0001/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-27793?
- CVE-2021-27793 is a medium-severity vulnerability in Broadcom Fabric Operating System, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2021-08-12.
- How severe is CVE-2021-27793?
- Medium severity. CVSS v3 base score is 5.3 out of 10.