Out-of-bounds Read in Broadcom Fabric Operating System
CVE-2021-27791
The function that is used to parse the Authentication header in Brocade Fabric OS Web application service before Brocade Fabric OS v9.0.1a and v8.2.3a fails to properly process a malformed authentication header from the client, resulting in reading memory addresses outside the intended range. An unauthenticated attacker could discover a request, which could bypass the authentication process.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (46.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Broadcom Fabric Operating System
- Brocade Fabric OS — versions Brocade Fabric OS before Brocade Fabric OS v9.0.1a and v8.2.3a
Weakness classification (CWE)
References
- www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-s… (Vendor Advisory)
- security.netapp.com/advisory/ntap-20210819-0002/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-27791?
- CVE-2021-27791 is a medium-severity vulnerability in Broadcom Fabric Operating System, classified under Out-of-bounds Read. CVSS score: 5.4/10. Published 2021-08-12.
- How severe is CVE-2021-27791?
- Medium severity. CVSS v3 base score is 5.4 out of 10.