BSA-2018-526

Brocade Security Advisory ID

BSA-2018-526

Initial Publication Date

01/17/2018

Last Updated

03/12/2018

Revision

2.0: Final

Risk Impact

Medium

Workaround

Yes

Component

Fabric OS IPv6 stack

Affected CVE

CVE-2017-6227

CVSS Score

7.5

Summary

A vulnerability in the IPv6 stack on Brocade Fibre Channel SAN products running Brocade Fabric OS (FOS) could allow an unauthenticated, adjacent attacker to cause a denial of service (CPU consumption and device hang) condition by sending crafted Router Advertisement (RA) messages to a targeted system. All versions of Brocade Fabric OS are affected.

Affected Products

Brocade Fabric OS -- Impacted: Fixed in v7.4.2c, v8.1.2 and v8.2.0

Products Confirmed Not Vulnerable

No other Brocade Fibre Channel technology products from Broadcom are currently known to be affected by this vulnerability.

Solution

Brocade has fixed the vulnerability described in this advisory in Brocade Fibre Channel SAN products running Brocade Fabric OS (FOS) v7.4.2c, v8.1.2, v8.2.0 and later releases. The patch releases have been posted to the MyBrocade web portal.

Workaround

To exploit this vulnerability, an attacker must be on the same local network as the targeted system. Minimizing exposure to this vulnerability can be done by using firewall and ipfilter to limit access to switch to trusted hosts only.

Recommended Action

Brocade strongly recommends that all customers running the impacted version(s) install the patch.

Credit

This vulnerability has been found through internal SQA testing.

Revision History

Version Change Date
1.0 Initial Publication January 17, 2018
2.0 Code versionupdated March 12, 2018

Disclaimer

THIS DOCUMENT IS PROVIDED ON AN AS-IS BASIS SOLELY FOR INFORMATIONAL PURPOSES AND DOES NOT IMPLY ANY KIND OF GUARANTY OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. YOUR USE OF THE INFORMATION CONTAINED HEREIN IS AT YOUR OWN RISK. ALL INFORMATION PROVIDED HEREIN IS BASED ON BROCADE'S CURRENT KNOWLEDGE AND UNDERSTANDING OF THE VULNERABILITY AND IMPACT TO BROCADE HARDWARE AND SOFTWARE PRODUCTS. BROCADE RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.