IBM Power Systems Firmware FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 - OP940.81 (Power HMC) is affected by a vulnerability in host firmware NVRAM parsing. An attacker with root access to a guest partition on an OpenPOWER system can write a specially crafted NVRAM image, causing the host firmware boot stage to crash with possible memory corruption. This condition persists until operator intervention — clearing NVRAM via the service processor — to restore normal operation. This vulnerability only affects OpenPOWER systems; systems running PowerVM are not affected. Successful exploitation results in an integrity and availability impact to the managed system.
Customers with the products below should install FW950.H3(950_230) or newer to remediate this vulnerability.
Power 9
- IBM Power System S922 (9009-22G)
- IBM Power System H922 (9223-22S)
- IBM Power System S914 (9009-41G)
- IBM Power System S924 (9009-42G)
- IBM Power System H924 (9223-42S)
- IBM Power System E950 (9040-MR9)
- IBM Power System E980 (9080-M9S)
Customers with the products below should install OP940.a2 or newer to remediate this vulnerability.
Power 9
- IBM Power System AC922 (8335-GTH, 8335-GTX)
Customers with the products below should install OP940.82 or newer to remediate this vulnerability.
Power Hardware Management Console
- IBM Power Hardware Management Console (7063-CR2)
The images mentioned above can be located at IBM Fix Central : https://www.ibm.com/support/fixcentral/ https://www.ibm.com/support/fixcentral/