Scientific Linux Security Update : qemu-kvm on SL7.x x86_64 (20170302)

2017-03-03T00:00:00
ID SL_20170302_QEMU_KVM_ON_SL7_X.NASL
Type nessus
Reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2017-03-03T00:00:00

Description

Security Fix(es) :

  • Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or potentially execute arbitrary code on the host with privileges of QEMU process on the host. (CVE-2017-2615)

  • Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrus_bitblt_cputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute arbitrary code on host with privileges of the QEMU process. (CVE-2017-2620)

Bug Fix(es) :

  • When using the virtio-blk driver on a guest virtual machine with no space on the virtual hard drive, the guest terminated unexpectedly with a

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#

include("compat.inc");

if (description)
{
  script_id(97517);
  script_version("3.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/25");

  script_cve_id("CVE-2017-2615", "CVE-2017-2620");
  script_xref(name:"IAVB", value:"2017-B-0024");

  script_name(english:"Scientific Linux Security Update : qemu-kvm on SL7.x x86_64 (20170302)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Scientific Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Security Fix(es) :

  - Quick emulator (QEMU) built with the Cirrus CLGD 54xx
    VGA emulator support is vulnerable to an out-of-bounds
    access issue. It could occur while copying VGA data via
    bitblt copy in backward mode. A privileged user inside a
    guest could use this flaw to crash the QEMU process
    resulting in DoS or potentially execute arbitrary code
    on the host with privileges of QEMU process on the host.
    (CVE-2017-2615)

  - Quick emulator (QEMU) built with the Cirrus CLGD 54xx
    VGA Emulator support is vulnerable to an out-of-bounds
    access issue. The issue could occur while copying VGA
    data in cirrus_bitblt_cputovideo. A privileged user
    inside guest could use this flaw to crash the QEMU
    process OR potentially execute arbitrary code on host
    with privileges of the QEMU process. (CVE-2017-2620)

Bug Fix(es) :

  - When using the virtio-blk driver on a guest virtual
    machine with no space on the virtual hard drive, the
    guest terminated unexpectedly with a 'block I/O error in
    device' message and the qemu-kvm process exited with a
    segmentation fault. This update fixes how the
    system_reset QEMU signal is handled in the above
    scenario. As a result, if a guest crashes due to no
    space left on the device, qemu-kvm continues running and
    the guest can be reset as expected."
  );
  # https://listserv.fnal.gov/scripts/wa.exe?A2=ind1703&L=scientific-linux-errata&F=&S=&P=406
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?59a8a749"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/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:fermilab:scientific_linux:qemu-img");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:qemu-kvm-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:qemu-kvm-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:qemu-kvm-tools");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/07/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/03/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/03/03");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Scientific Linux Local Security Checks");

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

  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) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Scientific Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 7.x", "Scientific Linux " + 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 (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);


flag = 0;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"qemu-img-1.5.3-126.el7_3.5")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"qemu-kvm-1.5.3-126.el7_3.5")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"qemu-kvm-common-1.5.3-126.el7_3.5")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"qemu-kvm-debuginfo-1.5.3-126.el7_3.5")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"qemu-kvm-tools-1.5.3-126.el7_3.5")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : rpm_report_get()
  );
  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");
}