SUSE-SU-2017:2327-2: important: Security update for xen

sle-security-updates at sle-security-updates at
Thu Nov 16 07:06:51 MST 2017

   SUSE Security Update: Security update for xen

Announcement ID:    SUSE-SU-2017:2327-2
Rating:             important
References:         #1002573 #1026236 #1027519 #1035231 #1046637 
                    #1049578 #1051787 #1051788 #1051789 #1052686 
Cross-References:   CVE-2017-10664 CVE-2017-11434 CVE-2017-12135
                    CVE-2017-12136 CVE-2017-12137 CVE-2017-12855
Affected Products:
                    SUSE Linux Enterprise Server 12-SP3

   An update that solves 6 vulnerabilities and has 5 fixes is
   now available.


   This update for xen fixes several issues.

   These security issues were fixed:

   - CVE-2017-12135: Unbounded recursion in grant table code allowed a
     malicious guest to crash the host or potentially escalate
     privileges/leak information (XSA-226, bsc#1051787).
   - CVE-2017-12137: Incorrectly-aligned updates to pagetables allowed for
     privilege escalation (XSA-227, bsc#1051788).
   - CVE-2017-12136: Race conditions with maptrack free list handling allows
     a malicious guest administrator to crash the host or escalate their
     privilege to that of the host (XSA-228, bsc#1051789).
   - CVE-2017-11434: The dhcp_decode function in slirp/bootp.c allowed local
     guest OS users to cause a denial of service (out-of-bounds read) via a
     crafted DHCP
     options string (bsc#1049578).
   - CVE-2017-10664: qemu-nbd did not ignore SIGPIPE, which allowed remote
     attackers to cause a denial of service (daemon crash) by disconnecting
     during a server-to-client reply attempt (bsc#1046637).
   - CVE-2017-12855: Premature clearing of GTF_writing / GTF_reading lead to
     potentially leaking sensitive information (XSA-230 bsc#1052686.

   These non-security issues were fixed:

   - bsc#1055695: XEN: 11SP4 and 12SP3 HVM guests can not be restored after
     the save using xl stack
   - bsc#1035231: Migration of HVM domU did not use superpages on destination
   - bsc#1002573: Optimized LVM functions in block-dmmd block-dmmd

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-SP3-2017-1437=1

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

Package List:

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



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