Power7 System Firmware

Response for Recent Security Vulnerabilities

• In response to recently reported security vulnerabilities, this firmware update is being released to address Common Vulnerabilities and Exposures issue number CVE-2017-5715. In addition, Operating System updates are available to mitigate the CVE-2017-5753 and CVE-2017-5754 security issues. This pertains to the following models:
  1)  IBM Power 770 (9117-MMC)
  2)  IBM Power 780 (9179-MHC)
  This firmware update also addresses CVE-2017-5715 for IBM i, along with updates for AIX and Linux, for the following models:
  1) IBM Power 750 Express (8408-E8D)
  2) IBM Power 760 (9109-RMD)
  3) IBM PowerLinux 7R4 (8248-L4T)
  

New features and functions

• In response to recently reported security vulnerabilities, this firmware update is being released to address Common Vulnerabilities and Exposures issue numbers CVE-2017-5715,  CVE-2017-5753 and CVE-2017-5754.  Note that a subsequent FW release is required and will replace this FW update for CVE-2017-5715 for IBMi when available.  In addition, Operating System updates are required in conjunction with this FW level for CVE-2017-5753 and CVE-2017-5754.
  The models addressed by this service pack update have the P7+ processor: 
  1) IBM Power 750 Express (8408-E8D)
  2) IBM Power 760 (9109-RMD)
  3) IBM PowerLinux 7R4 (8248-L4T)
  

• DEFERRED:  A problem was fixed for a I/O performance slow-down that can occur after a concurrent repair of a GX bus I/O adapter with a Feature Code of #1808 or #1914.  A re-IPL of the system after the concurrent repair operation corrects the I/O performance issue.  This fix requires an IPL of the system to take effect.
  This problem only pertains to the IBM Power 770 (9117-MMC) and the IBM Power 780 (9179-MHC).
  

System firmware changes that affect all systems

• On systems using Virtual Shared Processor Pools (VSPP), a problem was fixed for an inaccurate pool idle count over a small sampling period.
  
  A problem was corrected for a defect in an earlier service pack (AM770_098) that potentially caused an undetected corruption of firmware when the fix was concurrently activated. If the earlier service pack(AM770_098) was concurrently installed, a platform IPL will mitigate potential future exposure to the problem.
  

• HIPER/Pervasive:  On systems using PowerVM firmware, a performance problem was fixed that may affect shared processor partitions where there is a mixture of dedicated and shared processor partitions with virtual IO connections, such as virtual ethernet or Virtual IO Server (VIOS) hosting, between them.  In high availability cluster environments this problem may result in a split brain scenario.
• DEFERRED:  A performance problem was fixed for PCIe slot C4 which was missing a dedicated internal data buffer, making it a bottleneck when using certain high-performance IO adapters.  The PCIe slot C4 is now assigned a data capability of 16 GB.  This fix pertains only to the IBM Power 750 Express (8408-E8D), IBM Power 760 (9109-RMD), and IBM PowerLinux 7R4 (8248-L4T) systems.  This deferred fix addresses a potential performance problem but not an error condition.  As such,  customers may wait for the next planned service window to activate the deferred fix via a system reboot.

System firmware changes that affect all systems

• HIPER/Pervasive:  A security problem was fixed in the OpenSSL (Secure Socket Layer) protocol that allowed clients and servers, via a specially crafted handshake packet, to use weak keying material for communication.  A man-in-the-middle attacker could use this flaw to decrypt and modify traffic between the management console and the service processor.  The Common Vulnerabilities and Exposures issue number for this problem is CVE-2014-0224.
• HIPER/Pervasive:  A security problem was fixed in OpenSSL for a buffer overflow in the Datagram Transport Layer Security (DTLS) when handling invalid DTLS packet fragments.  This could be used to execute arbitrary code on the service processor.  The Common Vulnerabilities and Exposures issue number for this problem is CVE-2014-0195.
• HIPER/Pervasive:  Multiple security problems were fixed in the way that OpenSSL handled read and write buffers when the SSL_MODE_RELEASE_BUFFERS mode was enabled to prevent denial of service.  These could cause the service processor to reset or unexpectedly drop connections to the management console when processing certain SSL commands.  The Common Vulnerabilities and Exposures issue numbers for these problems are CVE-2010-5298 and CVE-2014-0198.
• HIPER/Pervasive:  A security problem was fixed in OpenSSL to prevent a denial of service when handling certain Datagram Transport Layer Security (DTLS) ServerHello requests. A specially crafted DTLS handshake packet could cause the service processor to reset.  The Common Vulnerabilities and Exposures issue number for this problem is CVE-2014-0221.
• HIPER/Pervasive:  A security problem was fixed in OpenSSL to prevent a denial of service by using an exploit of a null pointer de-reference during anonymous Elliptic Curve Diffie Hellman (ECDH) key exchange.  A specially crafted handshake packet could cause the service processor to reset.  The Common Vulnerabilities and Exposures issue number for this problem is CVE-2014-3470.

• HIPER/Pervasive:  A  security problem was fixed in the OpenSSL Montgomery ladder implementation for the ECDSA (Elliptic Curve Digital Signature Algorithm) to protect sensitive information from being obtained with a flush and reload cache side-channel attack to recover ECDSA nonces from the service processor.  The Common Vulnerabilities and Exposures issue number is CVE-2014-0076.  The stolen ECDSA nonces could be used to decrypt the SSL sessions and compromise the Hardware Management Console (HMC) access password to the service processor.  Therefore, the HMC access password for the managed system should be changed after applying this fix.
• HIPER/Pervasive:  A  security problem was fixed in the OpenSSL Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS) to not allow Heartbeat Extension packets to trigger a buffer over-read to steal private keys for the encrypted sessions on the service processor.  The Common Vulnerabilities and Exposures issue number is CVE-2014-0160 and it is also known as the heartbleed vulnerability.  The stolen private keys could be used to decrypt the SSL sessions and and compromise the Hardware Management Console (HMC) access password to the service processor.  Therefore, the HMC access password for the managed system should be changed after applying this fix.

• DEFERRED:  On Power7 systems, a problem was fixed that caused a system checkstop during hypervisor time keeping services. This deferred fix addresses a problem that has a very low probability of occurrence.  As such customers may wait for the next planned service window to activate the deferred fix via a system reboot.
  
• DEFERRED: On Power7 systems, a problem was fixed that caused a system checkstop with SRC B113E504 for a recoverable hardware fault.  This deferred fix addresses a problem that has a very low probability of occurrence.  As such customers may wait for the next planned service window to activate the deferred fix via a system reboot.