Scientific Linux Security Update : kvm on SL5.x x86_64

2015-10-23T00:00:00
ID SL_20151022_KVM_ON_SL5_X.NASL
Type nessus
Reporter Tenable
Modified 2015-10-23T00:00:00

Description

A heap buffer overflow flaw was found in the way QEMU's NE2000 NIC emulation implementation handled certain packets received over the network. A privileged user inside a guest could use this flaw to crash the QEMU instance (denial of service) or potentially execute arbitrary code on the host. (CVE-2015-5279)

NOTE: The following procedure must be performed before this update will take effect :

1) Stop all KVM guest virtual machines.

2) Either reboot the hypervisor machine or, as the root user, remove (using 'modprobe -r [module]') and reload (using 'modprobe [module]') all of the following modules which are currently running (determined using 'lsmod'): kvm, ksm, kvm-intel or kvm-amd.

3) Restart the KVM guest virtual machines.

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

include("compat.inc");

if (description)
{
  script_id(86563);
  script_version("$Revision: 2.1 $");
  script_cvs_date("$Date: 2015/10/23 13:44:41 $");

  script_cve_id("CVE-2015-5279");

  script_name(english:"Scientific Linux Security Update : kvm on SL5.x x86_64");
  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:
"A heap buffer overflow flaw was found in the way QEMU's NE2000 NIC
emulation implementation handled certain packets received over the
network. A privileged user inside a guest could use this flaw to crash
the QEMU instance (denial of service) or potentially execute arbitrary
code on the host. (CVE-2015-5279)

NOTE: The following procedure must be performed before this update
will take effect :

1) Stop all KVM guest virtual machines.

2) Either reboot the hypervisor machine or, as the root user, remove
(using 'modprobe -r [module]') and reload (using 'modprobe [module]')
all of the following modules which are currently running (determined
using 'lsmod'): kvm, ksm, kvm-intel or kvm-amd.

3) Restart the KVM guest virtual machines."
  );
  # http://listserv.fnal.gov/scripts/wa.exe?A2=ind1510&L=scientific-linux-errata&F=&S=&P=4514
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?ec6cf79d"
  );
  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_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2015/10/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/10/23");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015 Tenable Network Security, Inc.");
  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("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");
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);


flag = 0;
if (rpm_check(release:"SL5", cpu:"x86_64", reference:"kmod-kvm-83-274.el5_11")) flag++;
if (rpm_check(release:"SL5", cpu:"x86_64", reference:"kmod-kvm-debug-83-274.el5_11")) flag++;
if (rpm_check(release:"SL5", cpu:"x86_64", reference:"kvm-83-274.el5_11")) flag++;
if (rpm_check(release:"SL5", cpu:"x86_64", reference:"kvm-debuginfo-83-274.el5_11")) flag++;
if (rpm_check(release:"SL5", cpu:"x86_64", reference:"kvm-qemu-img-83-274.el5_11")) flag++;
if (rpm_check(release:"SL5", cpu:"x86_64", reference:"kvm-tools-83-274.el5_11")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");