Debian DLA-1781-1 : 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-1781-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(124720);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2018-11806", "CVE-2018-18849", "CVE-2018-20815", "CVE-2019-9824");

  script_name(english:"Debian DLA-1781-1 : 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 found in QEMU, a fast processor 
emulator :

CVE-2018-11806

It was found that the SLiRP networking implementation could use a
wrong size when reallocating its buffers, which can be exploited by a
priviledged user on a guest to cause denial of service or possibly
arbitrary code execution on the host system.

CVE-2018-18849

It was found that the LSI53C895A SCSI Host Bus Adapter emulation was
susceptible to an out of bounds memory access, which could be
leveraged by a malicious guest user to crash the QEMU process.

CVE-2018-20815

A heap buffer overflow was found in the load_device_tree function,
which could be used by a malicious user to potentially execute
arbitrary code with the priviledges of the QEMU process.

CVE-2019-9824

William Bowling discovered that the SLiRP networking implementation
did not handle some messages properly, which could be triggered to
leak memory via crafted messages.

For Debian 8 'Jessie', these problems have been fixed in version
1:2.1+dfsg-12+deb8u11.

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/2019/05/msg00010.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/qemu"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:"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-guest-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-kvm");
  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-system-arm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-mips");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-misc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-ppc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-sparc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:qemu-system-x86");
  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-binfmt");
  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:8.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/06/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/10");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2021 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:"8.0", prefix:"qemu", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-guest-agent", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-kvm", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-arm", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-common", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-mips", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-misc", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-ppc", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-sparc", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-x86", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-user", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-user-binfmt", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-user-static", reference:"1:2.1+dfsg-12+deb8u11")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-utils", reference:"1:2.1+dfsg-12+deb8u11")) flag++;

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