Security update for xen

Announcement ID:	SUSE-SU-2016:3044-1
Rating:	important
References:	bsc#1000106 bsc#1000893 bsc#1003030 bsc#1003032 bsc#1005004 bsc#1005005 bsc#1007157 bsc#1009100 bsc#1009103 bsc#1009107 bsc#1009109 bsc#1009111 bsc#1011652 bsc#990843
Cross-References:	CVE-2016-6351 CVE-2016-7777 CVE-2016-7908 CVE-2016-7909 CVE-2016-8667 CVE-2016-8669 CVE-2016-8910 CVE-2016-9379 CVE-2016-9380 CVE-2016-9381 CVE-2016-9382 CVE-2016-9383 CVE-2016-9386 CVE-2016-9637
CVSS scores:	CVE-2016-6351 ( NVD ): 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVE-2016-6351 ( NVD ): 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2016-7777 ( NVD ): 6.3 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N CVE-2016-7908 ( NVD ): 4.4 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H CVE-2016-7908 ( NVD ): 4.4 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H CVE-2016-7909 ( NVD ): 4.4 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H CVE-2016-7909 ( NVD ): 4.4 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H CVE-2016-8667 ( NVD ): 6.0 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H CVE-2016-8669 ( NVD ): 6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H CVE-2016-8669 ( NVD ): 6.0 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H CVE-2016-8910 ( SUSE ): 3.0 CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L CVE-2016-8910 ( NVD ): 6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H CVE-2016-8910 ( NVD ): 6.0 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H CVE-2016-9379 ( NVD ): 7.9 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N CVE-2016-9380 ( NVD ): 7.5 CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N CVE-2016-9381 ( SUSE ): 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H CVE-2016-9381 ( NVD ): 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H CVE-2016-9381 ( NVD ): 7.5 CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H CVE-2016-9382 ( NVD ): 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2016-9383 ( NVD ): 8.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVE-2016-9386 ( NVD ): 7.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2016-9637 ( NVD ): 7.5 CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected Products:	SUSE Linux Enterprise Server 11 SP2 LTSS 11-SP2

An update that solves 14 vulnerabilities can now be installed.

Description:

xen was updated to fix several security issues.

These security issues were fixed:

• CVE-2016-9637: ioport array overflow allowing a malicious guest administrator can escalate their privilege to that of the host (bsc#1011652).
• CVE-2016-9386: x86 null segments were not always treated as unusable allowing an unprivileged guest user program to elevate its privilege to that of the guest operating system. Exploit of this vulnerability is easy on Intel and more complicated on AMD (bsc#1009100)
• CVE-2016-9382: x86 task switch to VM86 mode was mis-handled, allowing a unprivileged guest process to escalate its privilege to that of the guest operating system on AMD hardware. On Intel hardware a malicious unprivileged guest process can crash the guest (bsc#1009103)
• CVE-2016-9383: The x86 64-bit bit test instruction emulation was broken, allowing a guest to modify arbitrary memory leading to arbitray code execution (bsc#1009107)
• CVE-2016-9381: Improper processing of shared rings allowing guest administrators take over the qemu process, elevating their privilege to that of the qemu process (bsc#1009109)
• CVE-2016-9380: Delimiter injection vulnerabilities in pygrub allowed guest administrators to obtain the contents of sensitive host files or delete the files (bsc#1009111)
• CVE-2016-9379: Delimiter injection vulnerabilities in pygrub allowed guest administrators to obtain the contents of sensitive host files or delete the files (bsc#1009111)
• CVE-2016-7777: Xen did not properly honor CR0.TS and CR0.EM, which allowed local x86 HVM guest OS users to read or modify FPU, MMX, or XMM register state information belonging to arbitrary tasks on the guest by modifying an instruction while the hypervisor is preparing to emulate it (bsc#1000106)
• CVE-2016-8910: The rtl8139_cplus_transmit function in hw/net/rtl8139.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) by leveraging failure to limit the ring descriptor count (bsc#1007157)
• CVE-2016-8667: The rc4030_write function in hw/dma/rc4030.c in allowed local guest OS administrators to cause a denial of service (divide-by-zero error and QEMU process crash) via a large interval timer reload value (bsc#1005004)
• CVE-2016-8669: The serial_update_parameters function in hw/char/serial.c allowed local guest OS administrators to cause a denial of service (divide-by-zero error and QEMU process crash) via vectors involving a value of divider greater than baud base (bsc#1005005)
• CVE-2016-7908: The mcf_fec_do_tx function in hw/net/mcf_fec.c did not properly limit the buffer descriptor count when transmitting packets, which allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via vectors involving a buffer descriptor with a length of 0 and crafted values in bd.flags (bsc#1003030)
• CVE-2016-7909: The pcnet_rdra_addr function in hw/net/pcnet.c allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) by setting the (1) receive or (2) transmit descriptor ring length to 0 (bsc#1003032)
• CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c, when built with ESP/NCR53C9x controller emulation support, allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or execute arbitrary code on the host via vectors involving DMA read into ESP command buffer (bsc#990843)

This non-security issue was fixed:

• bsc#1000893: virsh setmem didn't allow to set current guest memory to max limit

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

• SUSE Linux Enterprise Server 11 SP2 LTSS 11-SP2
  zypper in -t patch slessp2-xen-12874=1

Package List:

• SUSE Linux Enterprise Server 11 SP2 LTSS 11-SP2 (x86_64 i586)
  • xen-devel-4.1.6_08-32.1
  • xen-kmp-trace-4.1.6_08_3.0.101_0.7.44-32.1
  • xen-kmp-default-4.1.6_08_3.0.101_0.7.44-32.1
  • xen-libs-4.1.6_08-32.1
  • xen-tools-domU-4.1.6_08-32.1
• SUSE Linux Enterprise Server 11 SP2 LTSS 11-SP2 (i586)
  • xen-kmp-pae-4.1.6_08_3.0.101_0.7.44-32.1
• SUSE Linux Enterprise Server 11 SP2 LTSS 11-SP2 (x86_64)
  • xen-tools-4.1.6_08-32.1
  • xen-4.1.6_08-32.1
  • xen-doc-pdf-4.1.6_08-32.1
  • xen-libs-32bit-4.1.6_08-32.1
  • xen-doc-html-4.1.6_08-32.1

References:

• https://www.suse.com/security/cve/CVE-2016-6351.html
• https://www.suse.com/security/cve/CVE-2016-7777.html
• https://www.suse.com/security/cve/CVE-2016-7908.html
• https://www.suse.com/security/cve/CVE-2016-7909.html
• https://www.suse.com/security/cve/CVE-2016-8667.html
• https://www.suse.com/security/cve/CVE-2016-8669.html
• https://www.suse.com/security/cve/CVE-2016-8910.html
• https://www.suse.com/security/cve/CVE-2016-9379.html
• https://www.suse.com/security/cve/CVE-2016-9380.html
• https://www.suse.com/security/cve/CVE-2016-9381.html
• https://www.suse.com/security/cve/CVE-2016-9382.html
• https://www.suse.com/security/cve/CVE-2016-9383.html
• https://www.suse.com/security/cve/CVE-2016-9386.html
• https://www.suse.com/security/cve/CVE-2016-9637.html
• https://bugzilla.suse.com/show_bug.cgi?id=1000106
• https://bugzilla.suse.com/show_bug.cgi?id=1000893
• https://bugzilla.suse.com/show_bug.cgi?id=1003030
• https://bugzilla.suse.com/show_bug.cgi?id=1003032
• https://bugzilla.suse.com/show_bug.cgi?id=1005004
• https://bugzilla.suse.com/show_bug.cgi?id=1005005
• https://bugzilla.suse.com/show_bug.cgi?id=1007157
• https://bugzilla.suse.com/show_bug.cgi?id=1009100
• https://bugzilla.suse.com/show_bug.cgi?id=1009103
• https://bugzilla.suse.com/show_bug.cgi?id=1009107
• https://bugzilla.suse.com/show_bug.cgi?id=1009109
• https://bugzilla.suse.com/show_bug.cgi?id=1009111
• https://bugzilla.suse.com/show_bug.cgi?id=1011652
• https://bugzilla.suse.com/show_bug.cgi?id=990843