EulerOS 2.0 SP8 : qemu (EulerOS-SA-2020-1298)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

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

if (description)
{
  script_id(134790);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id(
    "CVE-2020-7039",
    "CVE-2020-8608"
  );

  script_name(english:"EulerOS 2.0 SP8 : qemu (EulerOS-SA-2020-1298)");
  script_summary(english:"Checks the rpm output for the updated packages.");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the qemu packages installed, the EulerOS
installation on the remote host is affected by the following
vulnerabilities :

  - tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in
    QEMU 4.2.0, mismanages memory, as demonstrated by IRC
    DCC commands in EMU_IRC. This can cause a heap-based
    buffer overflow or other out-of-bounds access which can
    lead to a DoS or potential execute arbitrary
    code.(CVE-2020-7039)

  - In libslirp 4.1.0, as used in QEMU 4.2.0, tcp_subr.c
    misuses snprintf return values, leading to a buffer
    overflow in later code.(CVE-2020-8608)

Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2020-1298
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?784f251d");
  script_set_attribute(attribute:"solution", value:
"Update the affected qemu packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:H/PR:N/UI:N/S:U/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-8608");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-audio-alsa");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-audio-oss");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-audio-pa");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-audio-sdl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-curl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-dmg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-gluster");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-iscsi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-nfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-rbd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-ssh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-img");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-system-aarch64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-system-aarch64-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-ui-curses");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-ui-gtk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-ui-sdl");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Huawei Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2020-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
  script_exclude_keys("Host/EulerOS/uvp_version");

  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/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");

sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(8)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8", "EulerOS UVP " + uvp);

if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);

flag = 0;

pkgs = ["qemu-audio-alsa-3.0.1-3.h5.eulerosv2r8",
        "qemu-audio-oss-3.0.1-3.h5.eulerosv2r8",
        "qemu-audio-pa-3.0.1-3.h5.eulerosv2r8",
        "qemu-audio-sdl-3.0.1-3.h5.eulerosv2r8",
        "qemu-block-curl-3.0.1-3.h5.eulerosv2r8",
        "qemu-block-dmg-3.0.1-3.h5.eulerosv2r8",
        "qemu-block-gluster-3.0.1-3.h5.eulerosv2r8",
        "qemu-block-iscsi-3.0.1-3.h5.eulerosv2r8",
        "qemu-block-nfs-3.0.1-3.h5.eulerosv2r8",
        "qemu-block-rbd-3.0.1-3.h5.eulerosv2r8",
        "qemu-block-ssh-3.0.1-3.h5.eulerosv2r8",
        "qemu-common-3.0.1-3.h5.eulerosv2r8",
        "qemu-img-3.0.1-3.h5.eulerosv2r8",
        "qemu-kvm-3.0.1-3.h5.eulerosv2r8",
        "qemu-system-aarch64-3.0.1-3.h5.eulerosv2r8",
        "qemu-system-aarch64-core-3.0.1-3.h5.eulerosv2r8",
        "qemu-ui-curses-3.0.1-3.h5.eulerosv2r8",
        "qemu-ui-gtk-3.0.1-3.h5.eulerosv2r8",
        "qemu-ui-sdl-3.0.1-3.h5.eulerosv2r8"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"8", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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");
}