openSUSE: Security Advisory for xen (openSUSE-SU-2018:1274-1)

# Copyright (C) 2018 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.851742");
  script_version("2020-06-09T14:44:58+0000");
  script_tag(name:"last_modification", value:"2020-06-09 14:44:58 +0000 (Tue, 09 Jun 2020)");
  script_tag(name:"creation_date", value:"2018-05-12 05:51:06 +0200 (Sat, 12 May 2018)");
  script_cve_id("CVE-2018-10471", "CVE-2018-10472", "CVE-2018-7540", "CVE-2018-7541",
                "CVE-2018-7542", "CVE-2018-8897", "CVE-2017-5754");
  script_tag(name:"cvss_base", value:"7.2");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"qod_type", value:"package");
  script_name("openSUSE: Security Advisory for xen (openSUSE-SU-2018:1274-1)");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'xen'
  package(s) announced via the referenced advisory.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");

  script_tag(name:"insight", value:"This update for xen to version 4.9.2 fixes several issues.

  This feature was added:

  - Added script, udev rule and systemd service to watch for vcpu
  online/offline events in a HVM domU. They are triggered via 'xl vcpu-set
  domU N'

  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-2018-7540: x86 PV guest OS users were able to cause a denial of
  service (host OS CPU hang) via non-preemptible L3/L4 pagetable freeing
  (bsc#1080635).

  - CVE-2018-7541: Guest OS users were able to cause a denial of service
  (hypervisor crash) or gain privileges by triggering a grant-table
  transition from v2 to v1 (bsc#1080662).

  - CVE-2018-7542: x86 PVH guest OS users were able to cause a denial of
  service (NULL pointer dereference and hypervisor crash) by leveraging
  the mishandling
  of configurations that lack a Local APIC (bsc#1080634).

  These non-security issues were fixed:

  - bsc#1087252: Update built-in defaults for xenstored in stubdom, keep
  default to run xenstored as daemon in dom0

  - bsc#1087251: Preserve xen-syms from xen-dbg.gz to allow processing
  vmcores with crash(1)

  - bsc#1072834: Prevent unchecked MSR access error

  This update was imported from the SUSE:SLE-12-SP3:Update update project.

  Patch Instructions:

  To install this openSUSE Security Update use the SUSE recommended
  installation methods
  like YaST online_update or 'zypper patch'.

  Alternatively you can run the command listed for your product:

  - openSUSE Leap 42.3:

  zypper in -t patch openSUSE-2018-454=1");

  script_tag(name:"affected", value:"xen on openSUSE Leap 42.3");

  script_tag(name:"solution", value:"Please install the updated package(s).");

  script_xref(name:"openSUSE-SU", value:"2018:1274-1");
  script_xref(name:"URL", value:"https://lists.opensuse.org/opensuse-security-announce/2018-05/msg00059.html");
  script_tag(name:"solution_type", value:"VendorFix");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2018 Greenbone Networks GmbH");
  script_family("SuSE Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/suse", "ssh/login/rpms", re:"ssh/login/release=openSUSELeap42\.3");
  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-rpm.inc");

release = rpm_get_ssh_release();
if(!release)
  exit(0);

res = "";
report = "";

if(release == "openSUSELeap42.3") {
  if(!isnull(res = isrpmvuln(pkg:"xen", rpm:"xen~4.9.2_04~19.2", rls:"openSUSELeap42.3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-debugsource", rpm:"xen-debugsource~4.9.2_04~19.2", rls:"openSUSELeap42.3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-devel", rpm:"xen-devel~4.9.2_04~19.2", rls:"openSUSELeap42.3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-doc-html", rpm:"xen-doc-html~4.9.2_04~19.2", rls:"openSUSELeap42.3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-libs", rpm:"xen-libs~4.9.2_04~19.2", rls:"openSUSELeap42.3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-libs-debuginfo", rpm:"xen-libs-debuginfo~4.9.2_04~19.2", rls:"openSUSELeap42.3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-tools", rpm:"xen-tools~4.9.2_04~19.2", rls:"openSUSELeap42.3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-tools-debuginfo", rpm:"xen-tools-debuginfo~4.9.2_04~19.2", rls:"openSUSELeap42.3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-tools-domU", rpm:"xen-tools-domU~4.9.2_04~19.2", rls:"openSUSELeap42.3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-tools-domU-debuginfo", rpm:"xen-tools-domU-debuginfo~4.9.2_04~19.2", rls:"openSUSELeap42.3"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

exit(0);