Vulnerabilities > CVE-2018-7550 - Out-of-bounds Write vulnerability in multiple products

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2019-620.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(123271);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/30");

  script_cve_id("CVE-2018-11806", "CVE-2018-3639", "CVE-2018-7550");

  script_name(english:"openSUSE Security Update : qemu (openSUSE-2019-620) (Spectre)");
  script_summary(english:"Check for the openSUSE-2019-620 patch");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote openSUSE host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for qemu to version 2.11.2 fixes the following issues :

Security issue fixed :

  - CVE-2018-11806: Fix heap buffer overflow issue that can
    happen while reassembling fragmented datagrams
    (bsc#1096223).

  - CVE-2018-3639: Mitigation functionality for Speculative
    Store Bypass issue in x86 (bsc#1087082).

  - CVE-2018-7550: Fix out of bounds read and write memory
    access, potentially leading to code execution
    (bsc#1083291)

Bug fixes :

  - bsc#1091695: SEV guest will not lauchh with
    qemu-system-x86_64 version 2.11.1.

  - bsc#1094898: qemu-guest-agent service doesn't work in
    version Leap 15.0.

  - bsc#1094725: `virsh blockresize` does not work with Xen
    qdisks.

  - bsc#1094913: QEMU crashes when starting a guest with
    more than 7.999TB.

This update was imported from the SUSE:SLE-15:Update update project."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1083291"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1087082"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1091695"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1094725"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1094898"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1094913"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1096223"
  );
  # https://features.opensuse.org/322124
  script_set_attribute(
    attribute:"see_also",
    value:"https://features.opensuse.org/"
  );
  # https://features.opensuse.org/325467
  script_set_attribute(
    attribute:"see_also",
    value:"https://features.opensuse.org/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected qemu 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:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-11806");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-arm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-arm-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-curl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-curl-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-dmg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-dmg-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-gluster");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-gluster-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-iscsi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-iscsi-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-rbd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-rbd-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-ssh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-block-ssh-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-extra-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-guest-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-guest-agent-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-ipxe");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-ksm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-lang");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-linux-user");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-linux-user-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-linux-user-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-ppc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-ppc-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-s390");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-s390-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-seabios");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-sgabios");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-testsuite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-tools-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-vgabios");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-x86");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:qemu-x86-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/03/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/27");
  script_set_attribute(attribute:"in_the_news", value:"true");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 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/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu");

  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, "openSUSE");
if (release !~ "^(SUSE15\.0)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(x86_64)$") audit(AUDIT_ARCH_NOT, "x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE15.0", reference:"qemu-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-arm-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-arm-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-block-curl-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-block-curl-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-block-dmg-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-block-dmg-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-block-gluster-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-block-gluster-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-block-iscsi-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-block-iscsi-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-block-rbd-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-block-rbd-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-block-ssh-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-block-ssh-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-debugsource-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-extra-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-extra-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-guest-agent-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-guest-agent-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-ipxe-1.0.0-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-ksm-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-kvm-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-lang-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-linux-user-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-linux-user-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-linux-user-debugsource-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-ppc-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-ppc-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-s390-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-s390-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-seabios-1.11.0-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-sgabios-8-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-testsuite-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-tools-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-tools-debuginfo-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-vgabios-1.11.0-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-x86-2.11.2-lp150.7.6.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"qemu-x86-debuginfo-2.11.2-lp150.7.6.1") ) 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, "qemu-linux-user / qemu-linux-user-debuginfo / etc");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:2462. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(111803);
  script_version("1.7");
  script_cvs_date("Date: 2019/10/24 15:35:45");

  script_cve_id("CVE-2018-11806", "CVE-2018-7550");
  script_xref(name:"RHSA", value:"2018:2462");

  script_name(english:"RHEL 7 : qemu-kvm (RHSA-2018:2462)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An update for qemu-kvm is now available for Red Hat Enterprise Linux
7.

Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

Kernel-based Virtual Machine (KVM) is a full virtualization solution
for Linux on a variety of architectures. The qemu-kvm packages provide
the user-space component for running virtual machines that use KVM.

Security Fix(es) :

* QEMU: slirp: heap buffer overflow while reassembling fragmented
datagrams (CVE-2018-11806)

* QEMU: i386: multiboot OOB access while loading kernel image
(CVE-2018-7550)

For more details about the security issue(s), including the impact, a
CVSS score, and other related information, refer to the CVE page(s)
listed in the References section.

Red Hat would like to thank Jskz - Zero Day Initiative
(trendmicro.com) for reporting CVE-2018-11806 and Cyrille Chatras
(Orange.com) and CERT-CC (Orange.com) for reporting CVE-2018-7550.

Bug Fix(es) :

* Previously, live migrating a Windows guest in some cases caused the
guest to become unresponsive. This update ensures that Real-time Clock
(RTC) interrupts are not missed, which prevents the problem from
occurring. (BZ# 1596302)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2018:2462"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2018-7550"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2018-11806"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A: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_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-img");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:qemu-kvm-tools");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.6");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7.7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/17");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 7.x", "Red Hat " + os_ver);

if (!get_kb_item("Host/RedHat/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$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2018:2462";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-img-1.5.3-156.el7_5.5")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-kvm-1.5.3-156.el7_5.5")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-kvm-common-1.5.3-156.el7_5.5")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-kvm-debuginfo-1.5.3-156.el7_5.5")) flag++;

  if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"qemu-kvm-tools-1.5.3-156.el7_5.5")) flag++;


  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "qemu-img / qemu-kvm / qemu-kvm-common / qemu-kvm-debuginfo / etc");
  }
}