Debian DLA-698-1 : qemu security update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-698-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(94519);
  script_version("2.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2016-7909", "CVE-2016-8909", "CVE-2016-8910", "CVE-2016-9101", "CVE-2016-9102", "CVE-2016-9103", "CVE-2016-9104", "CVE-2016-9105", "CVE-2016-9106");

  script_name(english:"Debian DLA-698-1 : qemu security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Several vulnerabilities were discovered in qemu, a fast processor
emulator. The Common Vulnerabilities and Exposures project identifies
the following problems :

CVE-2016-7909

Quick Emulator(Qemu) built with the AMD PC-Net II emulator support is
vulnerable to an infinite loop issue. It could occur while receiving
packets via pcnet_receive().

A privileged user/process inside guest could use this issue
to crash the Qemu process on the host leading to DoS.

CVE-2016-8909

Quick Emulator(Qemu) built with the Intel HDA controller emulation
support is vulnerable to an infinite loop issue. It could occur while
processing the DMA buffer stream while doing data transfer in
'intel_hda_xfer'.

A privileged user inside guest could use this flaw to
consume excessive CPU cycles on the host, resulting in DoS.

CVE-2016-8910

Quick Emulator(Qemu) built with the RTL8139 ethernet controller
emulation support is vulnerable to an infinite loop issue. It could
occur while transmitting packets in C+ mode of operation.

A privileged user inside guest could use this flaw to
consume excessive CPU cycles on the host, resulting in DoS
situation.

CVE-2016-9101

Quick Emulator(Qemu) built with the i8255x (PRO100) NIC emulation
support is vulnerable to a memory leakage issue. It could occur while
unplugging the device, and doing so repeatedly would result in leaking
host memory affecting, other services on the host.

A privileged user inside guest could use this flaw to cause
a DoS on the host and/or potentially crash the Qemu process
on the host.

CVE-2016-9102 CVE-2016-9105 CVE-2016-9106

Quick Emulator(Qemu) built with the VirtFS, host directory sharing via
Plan 9 File System(9pfs) support, is vulnerable to a several memory
leakage issues.

A privileged user inside guest could use this flaws to leak
the host memory bytes resulting in DoS for other services.

CVE-2016-9104

Quick Emulator(Qemu) built with the VirtFS, host directory sharing via
Plan 9 File System(9pfs) support, is vulnerable to an integer overflow
issue. It could occur by accessing xattributes values.

A privileged user inside guest could use this flaw to crash
the Qemu process instance resulting in DoS.

CVE-2016-9103

Quick Emulator(Qemu) built with the VirtFS, host directory sharing via
Plan 9 File System(9pfs) support, is vulnerable to an information
leakage issue. It could occur by accessing xattribute value before
it's written to.

A privileged user inside guest could use this flaw to leak
host memory bytes.

For Debian 7 'Wheezy', these problems have been fixed in version
1.1.2+dfsg-6+deb7u18.

We recommend that you upgrade your qemu packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA 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://lists.debian.org/debian-lts-announce/2016/11/msg00006.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/qemu"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:N/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:H/UI:N/S:C/C:N/I:N/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:debian:debian_linux:qemu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-keymaps");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-user");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-user-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-utils");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/10/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/11/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/11/04");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"7.0", prefix:"qemu", reference:"1.1.2+dfsg-6+deb7u18")) flag++;
if (deb_check(release:"7.0", prefix:"qemu-keymaps", reference:"1.1.2+dfsg-6+deb7u18")) flag++;
if (deb_check(release:"7.0", prefix:"qemu-system", reference:"1.1.2+dfsg-6+deb7u18")) flag++;
if (deb_check(release:"7.0", prefix:"qemu-user", reference:"1.1.2+dfsg-6+deb7u18")) flag++;
if (deb_check(release:"7.0", prefix:"qemu-user-static", reference:"1.1.2+dfsg-6+deb7u18")) flag++;
if (deb_check(release:"7.0", prefix:"qemu-utils", reference:"1.1.2+dfsg-6+deb7u18")) flag++;

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