CVE-2023-31425 — A vulnerability in the fosexec command of Brocade Fabric OS after Brocade Fabric

A vulnerability in the fosexec command of Brocade Fabric OS after Brocade Fabric OS v9.1.0 and, before Brocade Fabric OS v9.1.1 could allow a local authenticated user to perform privilege escalation to root by breaking the rbash shell. Starting with Fabric OS v9.1.0, “root” accou

01What is this vulnerability?

A vulnerability in the fosexec command of Brocade Fabric OS after Brocade Fabric OS v9.1.0 and, before Brocade Fabric OS v9.1.1 could allow a local authenticated user to perform privilege escalation to root by breaking the rbash shell. Starting with Fabric OS v9.1.0, “root” account access is disabled.

02Affected products

Vendor	Product	Versions
Brocade	Fabric OS	after Brocade Fabric OS v9.1.0 and, before Brocade Fabric OS v9.1.1

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-08-01T20:34:47.165Z
• Last modified: 2025-02-13T16:50:09.356Z

09References

• support.broadcom.com — https://support.broadcom.com/external/content/SecurityAdvisories/0/22407
• security.netapp.com — https://security.netapp.com/advisory/ntap-20230908-0007/