08 December 2016
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.2876 SUSE Security Update: Security update for xen 8 December 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: xen Publisher: SUSE Operating System: SUSE Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Increased Privileges -- Existing Account Delete Arbitrary Files -- Existing Account Denial of Service -- Existing Account Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2016-9637 CVE-2016-9386 CVE-2016-9383 CVE-2016-9382 CVE-2016-9381 CVE-2016-9380 CVE-2016-9379 CVE-2016-8910 CVE-2016-8669 CVE-2016-8667 CVE-2016-7909 CVE-2016-7908 CVE-2016-7777 CVE-2016-6351 Reference: ESB-2016.2850 ESB-2016.2814 ESB-2016.2808 - --------------------------BEGIN INCLUDED TEXT-------------------- SUSE Security Update: Security update for xen ______________________________________________________________________________ Announcement ID: SUSE-SU-2016:3044-1 Rating: important References: #1000106 #1000893 #1003030 #1003032 #1005004 #1005005 #1007157 #1009100 #1009103 #1009107 #1009109 #1009111 #1011652 #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 Affected Products: SUSE Linux Enterprise Server 11-SP2-LTSS SUSE Linux Enterprise Debuginfo 11-SP2 ______________________________________________________________________________ An update that fixes 14 vulnerabilities is now available. 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 Security Update use YaST online_update. Alternatively you can run the command listed for your product: - SUSE Linux Enterprise Server 11-SP2-LTSS: zypper in -t patch slessp2-xen-12874=1 - SUSE Linux Enterprise Debuginfo 11-SP2: zypper in -t patch dbgsp2-xen-12874=1 To bring your system up-to-date, use "zypper patch". Package List: - SUSE Linux Enterprise Server 11-SP2-LTSS (i586 x86_64): xen-devel-4.1.6_08-32.1 xen-kmp-default-4.1.6_08_3.0.101_0.7.44-32.1 xen-kmp-trace-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 (x86_64): xen-4.1.6_08-32.1 xen-doc-html-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-tools-4.1.6_08-32.1 - SUSE Linux Enterprise Server 11-SP2-LTSS (i586): xen-kmp-pae-4.1.6_08_3.0.101_0.7.44-32.1 - SUSE Linux Enterprise Debuginfo 11-SP2 (i586 x86_64): xen-debuginfo-4.1.6_08-32.1 xen-debugsource-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/1000106 https://bugzilla.suse.com/1000893 https://bugzilla.suse.com/1003030 https://bugzilla.suse.com/1003032 https://bugzilla.suse.com/1005004 https://bugzilla.suse.com/1005005 https://bugzilla.suse.com/1007157 https://bugzilla.suse.com/1009100 https://bugzilla.suse.com/1009103 https://bugzilla.suse.com/1009107 https://bugzilla.suse.com/1009109 https://bugzilla.suse.com/1009111 https://bugzilla.suse.com/1011652 https://bugzilla.suse.com/990843 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWEigoox+lLeg9Ub1AQjGiw//Ys4iIwrCLUCJthpMqtOfM3gPrU/YilWV zxnbYeEd2lzXkxlwO/Z+CYPaPtFlnENZpzgorLhpnC4kNq+qviyh71ao0E+fnNGG 2bUIuuckdcVJLuBm/ZYtXzGxG4lyWX+v4lv8cKnG4blRdEfCiaTFO0p6jbiBx1Dd pT04qrlawwgCtMHS1dyr8/KUtsVLodFssV8m6tS/uYZL9eRxLbmnwx8n7owdBFRo H464eVheFD6sEXmNGoIZvXry3vfHUf4sHuX1IEgk4VM0vH6S5Y5ZhGYozrY+irKg jGFlcE5kWMG3UxNYrL0fZSxCyM8OBu2G12V2Ifg2aNmvW5J9t63YKEgvOUrIvtrI v7h57FVbIEkhWPf7pB5xSVDJ0hP08LFk49WuMDko5Vce1AH6MUK24LQkgA8qjOiA WoIIl7aOoJybo+BkarqWhKpc4bludV8/Pnx20nP8rQydZauiD4zlQsCr1jActS6g uneY/kWcKIiobC9DqEUZVf6GQy2t+LduSXcRVz4+CLoM0lz+1tAmhUuiFKCNEKHy BpO4qbSmBOOvh1ZAv3Zco3IlZXjIO1hmgC591e5vzoMJrhU2GeWOdoQkcOP/nC+E OODTBY7axFalZAuwVfvNVLu5iq4rDPuEGLYZrwqT5AXQoJCTEvs8dz0mKPHXTm3h Y8ozERtup8Y= =eKH+ -----END PGP SIGNATURE-----