CVE-2021-27790

HIGH

7.8

CVSS Score

Published: August 12, 2021 at 02:27 PM UTC

Updated: June 17, 2026 at 03:45 AM UTC

1 product affected across 1 vendorFabric Operating System

Using Brocade Fabric OS by N/A?

Get instant alerts when new vulnerabilities affect Brocade Fabric OS - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH7.8

Exploit prediction

EPSS 0.5%

Description

The command ipfilter in Brocade Fabric OS before Brocade Fabric OS v.9.0.1a, v8.2.3, and v8.2.0_CBN4, and v7.4.2h uses unsafe string function to process user input. Authenticated attackers can abuse this vulnerability to exploit stack-based buffer overflows, allowing execution of arbitrary code as the root user account.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fabric Operating System · Broadcom

95%

v < 7.4.2h8.0.0 ≤ v < 8.2.0_cbn48.2.1 ≤ v < 8.2.39.0.0 ≤ v < 9.0.1aBrocade Fabric OS before Brocade Fabric OS v.9.0.1a, v8.2.3, and v8.2.0_CBN4, and v7.4.2h

Affected range stops below 7.4.2h, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.2.0_cbn4, so it looks safe — our inference, not a vendor statement

Affected range stops below 8.2.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 9.0.1a, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1492

References (2)

x_refsource_CONFIRMThird Party Advisory

Source: [email protected]

https://security.netapp.com/advisory/ntap-20210819-0002/

x_refsource_MISCVendor Advisory

Source: [email protected]

https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2021-1492

CVSS

7.8HIGH[email protected]

Attack Vector: LOCAL
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-787

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card