Vulnerabilities > CVE-2017-12855 - Information Exposure vulnerability in XEN

047910
CVSS 2.1 - LOW
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
NONE
local
low complexity
xen
CWE-200
nessus

Summary

Xen maintains the _GTF_{read,writ}ing bits as appropriate, to inform the guest that a grant is in use. A guest is expected not to modify the grant details while it is in use, whereas the guest is free to modify/reuse the grant entry when it is not in use. Under some circumstances, Xen will clear the status bits too early, incorrectly informing the guest that the grant is no longer in use. A guest may prematurely believe that a granted frame is safely private again, and reuse it in a way which contains sensitive information, while the domain on the far end of the grant is still using the grant. Xen 4.9, 4.8, 4.7, 4.6, and 4.5 are affected.

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Nessus

  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2017-2450-1.NASL
    descriptionThis 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-2017-11334: The address_space_write_continue function in exec.c allowed local guest OS privileged users to cause a denial of service (out-of-bounds access and guest instance crash) by leveraging use of qemu_map_ram_ptr to access guest ram block area (bsc#1048920). - 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-2017-10806: Stack-based buffer overflow in hw/usb/redirect.c allowed local guest OS users to cause a denial of service via vectors related to logging debug messages (bsc#1047675). - 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). - CVE-2017-14316: Missing bound check in function `alloc_heap_pages` for an internal array allowed attackers using crafted hypercalls to execute arbitrary code within Xen (XSA-231, bsc#1056278) - CVE-2017-14317: A race in cxenstored may have cause a double-free allowind for DoS of the xenstored daemon (XSA-233, bsc#1056281). - CVE-2017-14319: An error while handling grant mappings allowed malicious or buggy x86 PV guest to escalate its privileges or crash the hypervisor (XSA-234, bsc#1056282). The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id103216
    published2017-09-14
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103216
    titleSUSE SLES11 Security Update : xen (SUSE-SU-2017:2450-1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from SUSE update advisory SUSE-SU-2017:2450-1.
    # The text itself is copyright (C) SUSE.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(103216);
      script_version("3.9");
      script_cvs_date("Date: 2019/09/11 11:22:16");
    
      script_cve_id("CVE-2017-10664", "CVE-2017-10806", "CVE-2017-11334", "CVE-2017-11434", "CVE-2017-12135", "CVE-2017-12137", "CVE-2017-12855", "CVE-2017-14316", "CVE-2017-14317", "CVE-2017-14319");
    
      script_name(english:"SUSE SLES11 Security Update : xen (SUSE-SU-2017:2450-1)");
      script_summary(english:"Checks rpm output for the updated packages.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote SUSE host is missing one or more security updates."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "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-2017-11334: The address_space_write_continue
        function in exec.c allowed local guest OS privileged
        users to cause a denial of service (out-of-bounds access
        and guest instance crash) by leveraging use of
        qemu_map_ram_ptr to access guest ram block area
        (bsc#1048920).
    
      - 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-2017-10806: Stack-based buffer overflow in
        hw/usb/redirect.c allowed local guest OS users to cause
        a denial of service via vectors related to logging debug
        messages (bsc#1047675).
    
      - 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).
    
      - CVE-2017-14316: Missing bound check in function
        `alloc_heap_pages` for an internal array allowed
        attackers using crafted hypercalls to execute arbitrary
        code within Xen (XSA-231, bsc#1056278)
    
      - CVE-2017-14317: A race in cxenstored may have cause a
        double-free allowind for DoS of the xenstored daemon
        (XSA-233, bsc#1056281).
    
      - CVE-2017-14319: An error while handling grant mappings
        allowed malicious or buggy x86 PV guest to escalate its
        privileges or crash the hypervisor (XSA-234,
        bsc#1056282).
    
    The update package also includes non-security fixes. See advisory for
    details.
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the SUSE security advisory. Tenable
    has attempted to automatically clean and format it as much as possible
    without introducing additional issues."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1027519"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1032598"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1037413"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1046637"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1047675"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1048920"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1049578"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1051787"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1051788"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1052686"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1056278"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1056281"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1056282"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-10664/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-10806/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-11334/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-11434/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-12135/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-12137/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-12855/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-14316/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-14317/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2017-14319/"
      );
      # https://www.suse.com/support/update/announcement/2017/suse-su-20172450-1/
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?70bea784"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "To install this SUSE Security Update use YaST online_update.
    Alternatively you can run the command listed for your product :
    
    SUSE Linux Enterprise Software Development Kit 11-SP4:zypper in -t
    patch sdksp4-xen-13281=1
    
    SUSE Linux Enterprise Server 11-SP4:zypper in -t patch
    slessp4-xen-13281=1
    
    SUSE Linux Enterprise Debuginfo 11-SP4:zypper in -t patch
    dbgsp4-xen-13281=1
    
    To bring your system up-to-date, use 'zypper patch'."
      );
      script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"false");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-doc-html");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-kmp-default");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-kmp-pae");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-libs");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools-domU");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2017/07/25");
      script_set_attribute(attribute:"patch_publication_date", value:"2017/09/13");
      script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/14");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"SuSE Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/SuSE/release");
    if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
    os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
    os_ver = os_ver[1];
    if (! preg(pattern:"^(SLES11)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES11", "SUSE " + os_ver);
    
    if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    cpu = get_kb_item("Host/cpu");
    if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
    if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);
    if (cpu >!< "i386|i486|i586|i686|x86_64") audit(AUDIT_ARCH_NOT, "i386 / i486 / i586 / i686 / x86_64", cpu);
    
    
    sp = get_kb_item("Host/SuSE/patchlevel");
    if (isnull(sp)) sp = "0";
    if (os_ver == "SLES11" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES11 SP4", os_ver + " SP" + sp);
    
    
    flag = 0;
    if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"xen-kmp-default-4.4.4_22_3.0.101_108.7-61.9.2")) flag++;
    if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"xen-libs-4.4.4_22-61.9.2")) flag++;
    if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"xen-tools-domU-4.4.4_22-61.9.2")) flag++;
    if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"xen-4.4.4_22-61.9.2")) flag++;
    if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"xen-doc-html-4.4.4_22-61.9.2")) flag++;
    if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"xen-libs-32bit-4.4.4_22-61.9.2")) flag++;
    if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"xen-tools-4.4.4_22-61.9.2")) flag++;
    if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"xen-kmp-pae-4.4.4_22_3.0.101_108.7-61.9.2")) flag++;
    if (rpm_check(release:"SLES11", sp:"4", cpu:"i586", reference:"xen-kmp-default-4.4.4_22_3.0.101_108.7-61.9.2")) flag++;
    if (rpm_check(release:"SLES11", sp:"4", cpu:"i586", reference:"xen-libs-4.4.4_22-61.9.2")) flag++;
    if (rpm_check(release:"SLES11", sp:"4", cpu:"i586", reference:"xen-tools-domU-4.4.4_22-61.9.2")) flag++;
    if (rpm_check(release:"SLES11", sp:"4", cpu:"i586", reference:"xen-kmp-pae-4.4.4_22_3.0.101_108.7-61.9.2")) flag++;
    
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
      else security_hole(0);
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "xen");
    }
    
  • NASL familyOracleVM Local Security Checks
    NASL idORACLEVM_OVMSA-2017-0148.NASL
    descriptionThe remote OracleVM system is missing necessary patches to address critical security updates : - From: Jan Beulich Subject: gnttab: correct pin status fixup for copy Regardless of copy operations only setting GNTPIN_hst*, GNTPIN_dev* also need to be taken into account when deciding whether to clear _GTF_[read,writ]ing. At least for consistency with code elsewhere the read part better doesn
    last seen2020-06-01
    modified2020-06-02
    plugin id102906
    published2017-09-01
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102906
    titleOracleVM 3.3 : xen (OVMSA-2017-0148)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The package checks in this plugin were extracted from OracleVM
    # Security Advisory OVMSA-2017-0148.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(102906);
      script_version("3.5");
      script_cvs_date("Date: 2019/09/27 13:00:35");
    
      script_cve_id("CVE-2017-12135", "CVE-2017-12137", "CVE-2017-12855");
    
      script_name(english:"OracleVM 3.3 : xen (OVMSA-2017-0148)");
      script_summary(english:"Checks the RPM output for the updated packages.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote OracleVM host is missing one or more security updates."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "The remote OracleVM system is missing necessary patches to address
    critical security updates :
    
      - From: Jan Beulich Subject: gnttab: correct pin status
        fixup for copy Regardless of copy operations only
        setting GNTPIN_hst*, GNTPIN_dev* also need to be taken
        into account when deciding whether to clear
        _GTF_[read,writ]ing. At least for consistency with code
        elsewhere the read part better doesn't use any mask at
        all. This is XSA-230. (CVE-2017-12855)
    
      - From: Andrew Cooper Subject: grant_table: Default to v1,
        and disallow transitive grants The reference counting
        and locking discipline for transitive grants is broken.
        Their use is therefore declared out of security support.
        This is XSA-226. Transitive grants are expected to be
        unconditionally available with grant table v2. Hiding
        transitive grants alone is an ABI breakage for the
        guest. Modern versions of Linux and the Windows PV
        drivers use grant table v1, but older versions did use
        v2. In principle, disabling gnttab v2 entirely is the
        safer way to cause guests to avoid using transitive
        grants. However, some older guests which defaulted to
        using gnttab v2 don't tolerate falling back from v2 to
        v1 over migrate. This patch introduces a new command
        line option to control grant table behaviour. One
        suboption allows a choice of the maximum grant table
        version Xen will allow the guest to use, and defaults to
        v2. A different suboption independently controls whether
        transitive grants can be used. The default case is:
        gnttab=max_ver:2 To disable gnttab v2 entirely, use:
        gnttab=max_ver:1 To allow gnttab v2 and transitive
        grants, use: gnttab=max_ver:2,transitive
    
        Conflict: docs/misc/xen-command-line.markdown
        (CVE-2017-12135)
    
      - Revert wrong fix for xsa226 [bug 26567225]
    
      - From 3aab881c7331cf93ffd8d2f2dd9adfd18ed4fc99 Mon Sep 17
        00:00:00 2001 From: Andrew Cooper Date: Tue, 20 Jun 2017
        19:18:54 +0100 Subject: [PATCH] x86/grant: Disallow
        misaligned PTEs Pagetable entries must be aligned to
        function correctly. Disallow attempts from the guest to
        have a grant PTE created at a misaligned address, which
        would result in corruption of the L1 table with
        largely-guest-controlled values. This is XSA-227
        (CVE-2017-12137)
    
      - Prerequisite patch for xsa227-4.5.patch There is no
        macro ASSERT_UNREACHABLE before OVM3.4 which is needed
        by xsa227-4.5.patch This chunk is picked from upstream
        commit cacdb0faaa121ac8f792d5bd34cc6bc7c72d21da
        (CVE-2017-12137)
    
      - From: Jan Beulich Subject: gnttab: don't use possibly
        unbounded tail calls There is no guarantee that the
        compiler would actually translate them to branches
        instead of calls, so only ones with a known recursion
        limit are okay :
    
      - __release_grant_for_copy can call itself only once, as
        __acquire_grant_for_copy won't permit use of multi-level
        transitive grants,
    
      - __acquire_grant_for_copy is fine to call itself with the
        last argument false, as that prevents further recursion,
    
      - __acquire_grant_for_copy must not call itself to recover
        from an observed change to the active entry's pin count
        This is XSA-226. (CVE-2017-12135)
    
      - From 69549b08eb9bd3a525c07a97d952673a3d02c76a Mon Sep 17
        00:00:00 2001 From: Annie Li Date: Fri, 7 Jul 2017
        14:36:08 -0400 Subject: [PATCH] xen: increase default
        max grant frames and max maptrack frames Commit
        9dfba034e increase default max grant frames to 128 which
        is still not enough when the guest has more cpus and
        vbd/vif devices, so set it to 256. Also the default max
        maptrack frames needs to be increased accordingly."
      );
      # https://oss.oracle.com/pipermail/oraclevm-errata/2017-August/000774.html
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?e4f463c5"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected xen / xen-tools packages."
      );
      script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"false");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:vm:xen");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:vm:xen-tools");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:vm_server:3.3");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2017/08/15");
      script_set_attribute(attribute:"patch_publication_date", value:"2017/08/31");
      script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/01");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"OracleVM Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/OracleVM/release", "Host/OracleVM/rpm-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/OracleVM/release");
    if (isnull(release) || "OVS" >!< release) audit(AUDIT_OS_NOT, "OracleVM");
    if (! preg(pattern:"^OVS" + "3\.3" + "(\.[0-9]|$)", string:release)) audit(AUDIT_OS_NOT, "OracleVM 3.3", "OracleVM " + release);
    if (!get_kb_item("Host/OracleVM/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    cpu = get_kb_item("Host/cpu");
    if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
    if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "OracleVM", cpu);
    if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);
    
    flag = 0;
    if (rpm_check(release:"OVS3.3", reference:"xen-4.3.0-55.el6.186.45")) flag++;
    if (rpm_check(release:"OVS3.3", reference:"xen-tools-4.3.0-55.el6.186.45")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
      else security_hole(0);
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "xen / xen-tools");
    }
    
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2017-2339-1.NASL
    descriptionThis update for xen fixes the following issues : - CVE-2017-12855: Premature clearing of GTF_writing / GTF_reading lead to potentially leaking sensitive information (XSA-230, bsc#1052686). - 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-2017-11334: The address_space_write_continue function in exec.c allowed local guest OS privileged users to cause a denial of service (out-of-bounds access and guest instance crash) by leveraging use of qemu_map_ram_ptr to access guest ram block area (bsc#1048920). - 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). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id102954
    published2017-09-05
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102954
    titleSUSE SLES11 Security Update : xen (SUSE-SU-2017:2339-1)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-F336BA205D.NASL
    descriptionQemu: serial: host memory leakage 16550A UART emulation [CVE-2017-5579] (#1416162) Qemu: display: cirrus: OOB read access issue [CVE-2017-7718] (#1443444) xen: various flaws (#1481765) multiple problems with transitive grants [XSA-226, CVE-2017-12135] x86: PV privilege escalation via map_grant_ref [XSA-227, CVE-2017-12137] grant_table: Race conditions with maptrack free list handling [XSA-228, CVE-2017-12136] grant_table: possibly premature clearing of GTF_writing / GTF_reading [XSA-230, CVE-2017-12855] Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2017-08-23
    plugin id102686
    published2017-08-23
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102686
    titleFedora 26 : xen (2017-f336ba205d)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1132.NASL
    descriptionMultiple vulnerabilities have been discovered in the Xen hypervisor : CVE-2017-10912 Jann Horn discovered that incorrectly handling of page transfers might result in privilege escalation. CVE-2017-10913 / CVE-2017-10914 Jann Horn discovered that race conditions in grant handling might result in information leaks or privilege escalation. CVE-2017-10915 Andrew Cooper discovered that incorrect reference counting with shadow paging might result in privilege escalation. CVE-2017-10918 Julien Grall discovered that incorrect error handling in physical-to-machine memory mappings may result in privilege escalation, denial of service or an information leak. CVE-2017-10920 / CVE-2017-10921 / CVE-2017-10922 Jan Beulich discovered multiple places where reference counting on grant table operations was incorrect, resulting in potential privilege escalation CVE-2017-12135 Jan Beulich found multiple problems in the handling of transitive grants which could result in denial of service and potentially privilege escalation. CVE-2017-12137 Andrew Cooper discovered that incorrect validation of grants may result in privilege escalation. CVE-2017-12855 Jan Beulich discovered that incorrect grant status handling, thus incorrectly informing the guest that the grant is no longer in use. CVE-2017-14316 Matthew Daley discovered that the NUMA node parameter wasn
    last seen2020-03-17
    modified2017-10-12
    plugin id103791
    published2017-10-12
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103791
    titleDebian DLA-1132-1 : xen security update
  • NASL familyOracleVM Local Security Checks
    NASL idORACLEVM_OVMSA-2017-0153.NASL
    descriptionThe remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2017-0153 for details.
    last seen2020-06-01
    modified2020-06-02
    plugin id103830
    published2017-10-13
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103830
    titleOracleVM 3.4 : xen (OVMSA-2017-0153)
  • NASL familyMisc.
    NASL idXEN_SERVER_XSA-230.NASL
    descriptionAccording to its self-reported version number, the Xen hypervisor installed on the remote host is affected by multiple vulnerabilities. Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.
    last seen2020-06-01
    modified2020-06-02
    plugin id102585
    published2017-08-18
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102585
    titleXen Hypervisor Multiple Vulnerabilities (XSA-226 - XSA-230)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2017-2326-1.NASL
    descriptionThis update for xen to version 4.7.3 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 CVE-2017-12855). The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id102952
    published2017-09-05
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102952
    titleSUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2017:2326-1)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-3969.NASL
    descriptionMultiple vulnerabilities have been discovered in the Xen hypervisor : - CVE-2017-10912 Jann Horn discovered that incorrectly handling of page transfers might result in privilege escalation. - CVE-2017-10913 / CVE-2017-10914 Jann Horn discovered that race conditions in grant handling might result in information leaks or privilege escalation. - CVE-2017-10915 Andrew Cooper discovered that incorrect reference counting with shadow paging might result in privilege escalation. - CVE-2017-10916 Andrew Cooper discovered an information leak in the handling of the Memory Protection Extensions (MPX) and Protection Key (PKU) CPU features. This only affects Debian stretch. - CVE-2017-10917 Ankur Arora discovered a NULL pointer dereference in event polling, resulting in denial of service. - CVE-2017-10918 Julien Grall discovered that incorrect error handling in physical-to-machine memory mappings may result in privilege escalation, denial of service or an information leak. - CVE-2017-10919 Julien Grall discovered that incorrect handling of virtual interrupt injection on ARM systems may result in denial of service. - CVE-2017-10920 / CVE-2017-10921 / CVE-2017-10922 Jan Beulich discovered multiple places where reference counting on grant table operations was incorrect, resulting in potential privilege escalation. - CVE-2017-12135 Jan Beulich found multiple problems in the handling of transitive grants which could result in denial of service and potentially privilege escalation. - CVE-2017-12136 Ian Jackson discovered that race conditions in the allocator for grant mappings may result in denial of service or privilege escalation. This only affects Debian stretch. - CVE-2017-12137 Andrew Cooper discovered that incorrect validation of grants may result in privilege escalation. - CVE-2017-12855 Jan Beulich discovered that incorrect grant status handling, thus incorrectly informing the guest that the grant is no longer in use. - XSA-235 (no CVE yet) Wei Liu discovered that incorrect locking of add-to-physmap operations on ARM may result in denial of service.
    last seen2020-06-01
    modified2020-06-02
    plugin id103146
    published2017-09-13
    reporterThis script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103146
    titleDebian DSA-3969-1 : xen - security update
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2017-2541-1.NASL
    descriptionThis 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-2017-11334: The address_space_write_continue function in exec.c allowed local guest OS privileged users to cause a denial of service (out-of-bounds access and guest instance crash) by leveraging use of qemu_map_ram_ptr to access guest ram block area (bsc#1048920). - 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-2017-10806: Stack-based buffer overflow in hw/usb/redirect.c allowed local guest OS users to cause a denial of service via vectors related to logging debug messages (bsc#1047675). - 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). - CVE-2017-14316: Missing bound check in function `alloc_heap_pages` for an internal array allowed attackers using crafted hypercalls to execute arbitrary code within Xen (XSA-231, bsc#1056278) - CVE-2017-14317: A race in cxenstored may have cause a double-free allowind for DoS of the xenstored daemon (XSA-233, bsc#1056281). - CVE-2017-14319: An error while handling grant mappings allowed malicious or buggy x86 PV guest to escalate its privileges or crash the hypervisor (XSA-234, bsc#1056282). The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id103412
    published2017-09-22
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103412
    titleSUSE SLES12 Security Update : xen (SUSE-SU-2017:2541-1)
  • NASL familyOracleVM Local Security Checks
    NASL idORACLEVM_OVMSA-2017-0149.NASL
    descriptionThe remote OracleVM system is missing necessary patches to address critical security updates : - From e26560a4b056dad6d85ffd9ebfad9565f210a9cc Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Wed, 30 May 2012 09:22:17 +0100 Subject: [PATCH] gnttab: don
    last seen2020-06-01
    modified2020-06-02
    plugin id102907
    published2017-09-01
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102907
    titleOracleVM 3.2 : xen (OVMSA-2017-0149)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2017-1023.NASL
    descriptionThis 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 dom0 - bsc#1002573: Optimized LVM functions in block-dmmd block-dmmd This update was imported from the SUSE:SLE-12-SP3:Update update project.
    last seen2020-06-05
    modified2017-09-13
    plugin id103159
    published2017-09-13
    reporterThis script is Copyright (C) 2017-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/103159
    titleopenSUSE Security Update : xen (openSUSE-2017-1023)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2017-2327-2.NASL
    descriptionThis 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. The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id104649
    published2017-11-17
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/104649
    titleSUSE SLES12 Security Update : xen (SUSE-SU-2017:2327-2)
  • NASL familyMisc.
    NASL idCITRIX_XENSERVER_CTX225941.NASL
    descriptionThe version of Citrix XenServer installed on the remote host is missing a security hotfix. It is, therefore, affected by multiple vulnerabilities as noted in the CTX225941 advisory.
    last seen2020-05-03
    modified2017-08-16
    plugin id102526
    published2017-08-16
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102526
    titleCitrix XenServer Multiple Vulnerabilities (CTX225941)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2017-2327-1.NASL
    descriptionThis 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. The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id102953
    published2017-09-05
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/102953
    titleSUSE SLED12 Security Update : xen (SUSE-SU-2017:2327-1)
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2017-ED735463E3.NASL
    descriptionQemu: usb: ohci: infinite loop due to incorrect return value [CVE-2017-9330] (#1457698) Qemu: qemu-nbd: server breaks with SIGPIPE upon client abort [CVE-2017-10664] (#1466466) revised full fix for XSA-226 (regressed 32-bit Dom0 or backend domains) ---- full fix for XSA-226, replacing workaround drop conflict of xendomain and libvirtd as can cause problems (#1398590) add-to-physmap error paths fail to release lock on ARM [XSA-235] (#1484476) Qemu: audio: host memory leakage via capture buffer [CVE-2017-8309] (#1446521) Qemu: input: host memory leakage via keyboard events [CVE-2017-8379] (#1446561) ---- Qemu: serial: host memory leakage 16550A UART emulation [CVE-2017-5579] (#1416162) Qemu: display: cirrus: OOB read access issue [CVE-2017-7718] (#1443444) xen: various flaws (#1481765) multiple problems with transitive grants [XSA-226, CVE-2017-12135] x86: PV privilege escalation via map_grant_ref [XSA-227, CVE-2017-12137] grant_table: Race conditions with maptrack free list handling [XSA-228, CVE-2017-12136] grant_table: possibly premature clearing of GTF_writing / GTF_reading [XSA-230, CVE-2017-12855] Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2017-09-20
    plugin id103342
    published2017-09-20
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103342
    titleFedora 25 : xen (2017-ed735463e3)
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2017-1022.NASL
    descriptionThis update for xen to version 4.7.3 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 CVE-2017-12855). 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 dom0 - bsc#1002573: Optimized LVM functions in block-dmmd block-dmmd - bsc#1037840: Xen-detect always showed HVM for PV guests This update was imported from the SUSE:SLE-12-SP2:Update update project.
    last seen2020-06-05
    modified2017-09-13
    plugin id103158
    published2017-09-13
    reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103158
    titleopenSUSE Security Update : xen (openSUSE-2017-1022)