BSA-2017-360

Brocade Security Advisory ID

BSA-2017-360

Initial Publication Date

08/25/2017

Last Updated

10/27/2017

Revision

2.0: Interim

Risk Impact

Low

Workaround

N/A

Component

Linux Kernel

Affected CVE

CVE-2017-1000365

CVSS Score

X.X

Summary

The offset2lib patch as used by the Linux Kernel contains a vulnerability, if RLIMIT_STACK is set to RLIMIT_INFINITY and 1 Gigabyte of memory is allocated (the maximum under the 1/4 restriction) then the stack will be grown down to 0x80000000, and as the PIE binary is mapped above 0x80000000 the minimum distance between the end of the PIE binary's read-write segment and the start of the stack becomes small enough that the stack guard page can be jumped over by an attacker.

Affected Products

Brocade is investigating its product lines to determine which products may be affected by this vulnerability and the impact on each affected product.

Products Confirmed Not Vulnerable

Products

Workaround

Brocade Fabric OS, Brocade FastIron OS, Brocade NetIron OS, Brocade ServerIron ADX, and Brocade Workflow Composer are confirmed not affected by this vulnerability..


Revision History

Version Change Date
1.0 Initial Publication August 25, 2017
2.0 Updated to address ADX & WC October 27, 2017

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.