SUSE-SU-2017:3090-1: moderate: Recommended update for tboot

[sle-security-updates at lists.suse.com]

   SUSE Security Update: Recommended update for tboot
______________________________________________________________________________

Announcement ID:    SUSE-SU-2017:3090-1
Rating:             moderate
References:         #1057555 #1068390 
Cross-References:   CVE-2017-16837
Affected Products:
                    SUSE Linux Enterprise Server 12-SP3
                    SUSE Linux Enterprise Server 12-SP2
______________________________________________________________________________

   An update that solves one vulnerability and has one errata
   is now available.

Description:

   This update for tboot fixes the following issues:

   Security issue fixed:

   - CVE-2017-16837: Certain function pointers in Trusted Boot (tboot)
     through 1.9.6 are notvalidated and can cause arbitrary code execution,
     which allows local users tooverwrite dynamic PCRs of Trusted Platform
     Module (TPM) by h (bsc#1068390)

   Bug fixes:

   - Fixed failed trusted boot on some systems like Intel Xeon "Purley 8s"
     processors. The following error message showed: "TBOOT: wait-for-sipi
     loop timed-out". Booting continued but "TXT measured launch" was wrongly
     reported as FALSE. (bsc#1057555)


Patch Instructions:

   To install this SUSE Security Update use YaST online_update.
   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Server 12-SP3:

      zypper in -t patch SUSE-SLE-SERVER-12-SP3-2017-1901=1

   - SUSE Linux Enterprise Server 12-SP2:

      zypper in -t patch SUSE-SLE-SERVER-12-SP2-2017-1901=1

   To bring your system up-to-date, use "zypper patch".


Package List:

   - SUSE Linux Enterprise Server 12-SP3 (x86_64):

      tboot-20160518_1.9.4-7.5.1
      tboot-debuginfo-20160518_1.9.4-7.5.1
      tboot-debugsource-20160518_1.9.4-7.5.1

   - SUSE Linux Enterprise Server 12-SP2 (x86_64):

      tboot-20160518_1.9.4-7.5.1
      tboot-debuginfo-20160518_1.9.4-7.5.1
      tboot-debugsource-20160518_1.9.4-7.5.1


References:

   https://www.suse.com/security/cve/CVE-2017-16837.html
   https://bugzilla.suse.com/1057555
   https://bugzilla.suse.com/1068390