Debian DLA-1694-1 : 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-1694-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(122511);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/11");

  script_cve_id("CVE-2018-12617", "CVE-2018-16872", "CVE-2019-6778");

  script_name(english:"Debian DLA-1694-1 : 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-2018-12617

The qmp_guest_file_read function (qga/commands-posix.c) is affected by
an integer overflow and subsequent memory allocation failure. This
weakness might be leveraged by remote attackers to cause denial of
service (application crash).

CVE-2018-16872

The usb_mtp_get_object, usb_mtp_get_partial_object and
usb_mtp_object_readdir functions (hw/usb/dev-mtp.c) are affected by a
symlink attack. Remote attackers might leverage this vulnerability to
perform information disclosure.

CVE-2019-6778

The tcp_emu function (slirp/tcp_subr.c) is affected by a heap buffer
overflow caused by insufficient validation of available space in the
sc_rcv->sb_data buffer. Remote attackers might leverage this flaw to
cause denial of service, or any other unspecified impact.

For Debian 8 'Jessie', these problems have been fixed in version
1:2.1+dfsg-12+deb8u10.

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/2019/02/msg00041.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:L/AC:L/Au:N/C:P/I:P/A:P");
  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:L/UI:N/S:U/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-2019-6778");
  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: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:"2018/06/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/02/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/01");
  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+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-guest-agent", reference:"1:2.1+dfsg-12+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-kvm", reference:"1:2.1+dfsg-12+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system", reference:"1:2.1+dfsg-12+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-arm", reference:"1:2.1+dfsg-12+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-common", reference:"1:2.1+dfsg-12+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-mips", reference:"1:2.1+dfsg-12+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-misc", reference:"1:2.1+dfsg-12+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-ppc", reference:"1:2.1+dfsg-12+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-sparc", reference:"1:2.1+dfsg-12+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-system-x86", reference:"1:2.1+dfsg-12+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-user", reference:"1:2.1+dfsg-12+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-user-binfmt", reference:"1:2.1+dfsg-12+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-user-static", reference:"1:2.1+dfsg-12+deb8u10")) flag++;
if (deb_check(release:"8.0", prefix:"qemu-utils", reference:"1:2.1+dfsg-12+deb8u10")) 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");