EulerOS Virtualization 2.5.1 : kernel (EulerOS-SA-2018-1280)

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

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

if (description)
{
  script_id(117586);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id(
    "CVE-2017-18270",
    "CVE-2018-1000204",
    "CVE-2018-1120"
  );

  script_name(english:"EulerOS Virtualization 2.5.1 : kernel (EulerOS-SA-2018-1280)");
  script_summary(english:"Checks the rpm output for the updated packages.");

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

  - In the Linux kernel before 4.13.5, a local user could
    create keyrings for other users via keyctl commands,
    setting unwanted defaults or causing a denial of
    service.(CVE-2017-18270)

  - ** DISPUTED ** Linux Kernel version 3.18 to 4.16
    incorrectly handles an SG_IO ioctl on /dev/sg0 with
    dxfer_direction=SG_DXFER_FROM_DEV and an empty 6-byte
    cmdp. This may lead to copying up to 1000 kernel heap
    pages to the userspace. This has been fixed upstream in
    https://github.com/torvalds/linux/commit/a45b599ad808c3
    c982fdcdc12b0b8611c2f92824 already. The problem has
    limited scope, as users don't usually have permissions
    to access SCSI devices. On the other hand, e.g. the
    Nero user manual suggests doing `chmod o+r+w /dev/sg*`
    to make the devices accessible.(CVE-2018-1000204)

  - A flaw was found affecting the Linux kernel before
    version 4.17. By mmap()ing a FUSE-backed file onto a
    process's memory containing command line arguments (or
    environment strings), an attacker can cause utilities
    from psutils or procps (such as ps, w) or any other
    program which makes a read() call to the
    /proc/pid/cmdline (or /proc/pid/environ) files to block
    indefinitely (denial of service) or for some controlled
    time (as a synchronization primitive for other
    attacks).(CVE-2018-1120)

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-2018-1280
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?715ecb89");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/09/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-tools-libs-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:2.5.1");
  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) 2018-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "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");
uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "2.5.1") audit(AUDIT_OS_NOT, "EulerOS Virtualization 2.5.1");
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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["kernel-3.10.0-514.44.5.10_54",
        "kernel-devel-3.10.0-514.44.5.10_54",
        "kernel-headers-3.10.0-514.44.5.10_54",
        "kernel-tools-3.10.0-514.44.5.10_54",
        "kernel-tools-libs-3.10.0-514.44.5.10_54",
        "kernel-tools-libs-devel-3.10.0-514.44.5.10_54"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", 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, "kernel");
}