IBM Support

Security Bulletin: IBM Security Access Manager appliances may be affected by a kernel vulnerability known as the Dirty COW bug (CVE-2016-5195)

Created by Ann-Louise Bolger on
Published URL:
https://www.ibm.com/support/pages/node/290737
290737

Security Bulletin


Summary

Linux Kernel could allow a local attacker to gain elevated privileges on the system, caused by a race condition when handling the copy-on-write (COW) breakage of private read-only memory mappings by the memory subsystem. This vulnerability is known as the Dirty COW bug.

Under certain circumstances, IBM Security Access Manager appliances might be affected by this vulnerability.

Vulnerability Details

CVEID: CVE-2016-5195
DESCRIPTION: Linux Kernel could allow a local attacker to gain elevated privileges on the system, caused by a race condition when handling the copy-on-write (COW) breakage of private read-only memory mappings by the memory subsystem. An attacker could exploit this vulnerability to gain write access to read-only memory mappings and elevated privileges on the system. Note: This vulnerability is known as the Dirty COW bug.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/118170 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

IBM Security Access Manager for Web 7.0 appliances, all firmware versions.

IBM Security Access Manager for Web 8.0 appliances, all firmware versions.

IBM Security Access Manager for Mobile 8.0 appliances, all firmware versions.

IBM Security Access Manager 9.0 appliances, all firmware versions.

Remediation/Fixes

IBM has provided patches for all affected versions. Follow the installation instructions in the README files included with the patch.

ProductVRMFAPARRemediation
IBM Security Access Manager for Web7.0IV931851. Apply Interim Fix 29:
7.0.0-ISS-WGA-IF0029
IBM Security Access Manager for Web8.0.0.0 -
8.0.1.5		IV931731. Upgrade to 8.0.1.6:
8.0.1-ISS-WGA-FP0006
IBM Security Access Manager for Mobile8.0.0.0 -
8.0.1.5		IV932481. Upgrade to 8.0.1.6:
8.0.1-ISS-ISAM-FP0006
IBM Security Access Manager9.0 - 9.0.2.1IV931731. Upgrade to 9.0.3.0:
IBM Security Access Manager V9.0.3 Multiplatform, Multilingual (CRW4EML)

Workarounds and Mitigations

None.

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References

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

20 May 2017: Original version published.

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Document Information

Modified date:
16 June 2018

UID

swg21997991

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