suse-su-2018:1202-1
Vulnerability from csaf_suse
Published
2018-05-10 10:43
Modified
2018-05-10 10:43
Summary
Security update for xen

Notes

Title of the patch
Security update for xen
Description of the patch
This update for xen fixes several issues. These security issues were fixed: - CVE-2018-8897: Prevent mishandling of debug exceptions on x86 (XSA-260, bsc#1090820) - Handle HPET timers in IO-APIC mode correctly to prevent malicious or buggy HVM guests from causing a hypervisor crash or potentially privilege escalation/information leaks (XSA-261, bsc#1090822) - Prevent unbounded loop, induced by qemu allowing an attacker to permanently keep a physical CPU core busy (XSA-262, bsc#1090823) - CVE-2018-10472: x86 HVM guest OS users (in certain configurations) were able to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot (bsc#1089152). - CVE-2018-10471: x86 PV guest OS users were able to cause a denial of service (out-of-bounds zero write and hypervisor crash) via unexpected INT 80 processing, because of an incorrect fix for CVE-2017-5754 (bsc#1089635). - CVE-2018-7550: The load_multiboot function allowed local guest OS users to execute arbitrary code on the host via a mh_load_end_addr value greater than mh_bss_end_addr, which triggers an out-of-bounds read or write memory access (bsc#1083292).
Patchnames
SUSE-OpenStack-Cloud-6-2018-839,SUSE-SLE-SAP-12-SP1-2018-839,SUSE-SLE-SERVER-12-SP1-2018-839
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).


To clipboard 

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  "vulnerabilities": [
    {
      "cve": "CVE-2018-10471",
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          "text": "https://www.suse.com/security/cve/CVE-2018-10471"
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        {
          "category": "general",
          "text": "An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (out-of-bounds zero write and hypervisor crash) via unexpected INT 80 processing, because of an incorrect fix for CVE-2017-5754.",
          "title": "CVE description"
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            "vectorString": "CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
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      "threats": [
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          "date": "2018-05-10T10:43:03Z",
          "details": "important"
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      "title": "CVE-2018-7550"
    },
    {
      "cve": "CVE-2018-8897",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2018-8897"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer\u0027s Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A; section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating system at CPL \u003c 3, the debug exception is delivered after the transfer to CPL \u003c 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs.",
          "title": "CVE description"
        }
      ],
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          "url": "https://www.suse.com/security/cve/CVE-2018-8897"
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          "category": "external",
          "summary": "SUSE Bug 1087078 for CVE-2018-8897",
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          "summary": "SUSE Bug 1090368 for CVE-2018-8897",
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          "summary": "SUSE Bug 1092497 for CVE-2018-8897",
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          "summary": "SUSE Bug 1093522 for CVE-2018-8897",
          "url": "https://bugzilla.suse.com/1093522"
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          "summary": "SUSE Bug 1093524 for CVE-2018-8897",
          "url": "https://bugzilla.suse.com/1093524"
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          "category": "external",
          "summary": "SUSE Bug 1098813 for CVE-2018-8897",
          "url": "https://bugzilla.suse.com/1098813"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1100835 for CVE-2018-8897",
          "url": "https://bugzilla.suse.com/1100835"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1115893 for CVE-2018-8897",
          "url": "https://bugzilla.suse.com/1115893"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1178658 for CVE-2018-8897",
          "url": "https://bugzilla.suse.com/1178658"
        }
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      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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      "title": "CVE-2018-8897"
    }
  ]
}


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Nomenclature

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