Security Bulletin: IBM has released Unified Extensible Firmware Interface (UEFI) fixes in response to TianoCore EDK II BIOS Vulnerability (CVE-2018-12182)

Summary

IBM has released the following Unified Extensible Firmware Interface (UEFI) fixes for System x and Flex systems in response to the TianoCore EDK II BIOS Vulnerability listed below.

Vulnerability Details

CVEID: CVE-2018-12182 DESCRIPTION: TianoCore EDK II BIOS could allow a local authenticated attacker to gain elevated privileges on the system, caused by improper memory write check in SMM service. By sending a specially-crafted request, an attacker could exploit this vulnerability to gain elevated privileges, obtain sensitive information or cause a denial of service condition.
CVSS Base Score: 8.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/161214&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H)

Affected Products and Versions

Product

|

Affected Version

—|—

Flex System x280, x480, x880 7903

|

n2e1

System x3850 x6 3837/3839
System x3950 x6 3839

|

a8e1

Remediation/Fixes

Firmware fix versions are available on Fix Central: http://www.ibm.com/support/fixcentral/

Product

|

Fixed Version

—|—
Flex System x280, x480, x880 7903
(ibm_fw_uefi_n2e134d-2.10_anyos_32-64) | n2e134d-2.10
System x3850 x6 3837/3839
System x3950 x6 3839
(ibm_fw_uefi_a8e132d-1.90_anyos_32-64) | a8e132d-1.90

Workarounds and Mitigations

None