EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1515)

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

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

if (description)
{
  script_id(124836);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/02/09");

  script_cve_id(
    "CVE-2014-8171",
    "CVE-2017-12762",
    "CVE-2017-5715",
    "CVE-2017-5753",
    "CVE-2017-9725",
    "CVE-2018-3620",
    "CVE-2018-3639",
    "CVE-2018-3646",
    "CVE-2018-9516",
    "CVE-2018-9568"
  );
  script_bugtraq_id(
    74293
  );

  script_name(english:"EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1515)");
  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 :

  - A flaw was found where the kernel truncated the value
    used to indicate the size of a buffer which it would
    later become zero using an untruncated value. This can
    corrupt memory outside of the original
    allocation.(CVE-2017-9725)

  - An industry-wide issue was found in the way many modern
    microprocessor designs have implemented speculative
    execution of instructions (a commonly used performance
    optimization). There are three primary variants of the
    issue which differ in the way the speculative execution
    can be exploited. Variant CVE-2017-5753 triggers the
    speculative execution by performing a bounds-check
    bypass. It relies on the presence of a
    precisely-defined instruction sequence in the
    privileged code as well as the fact that memory
    accesses may cause allocation into the microprocessor's
    data cache even for speculatively executed instructions
    that never actually commit (retire). As a result, an
    unprivileged attacker could use this flaw to cross the
    syscall boundary and read privileged memory by
    conducting targeted cache side-channel
    attacks.(CVE-2017-5753)

  - A buffer overflow was found in the Linux kernel's
    isdn_net_newslave() function in the
    /drivers/isdn/i4l/isdn_net.c file. An overflow happens
    when the user-controlled buffer is copied into a local
    buffer of constant size using strcpy() without a length
    check.(CVE-2017-12762)

  - Modern operating systems implement virtualization of
    physical memory to efficiently use available system
    resources and provide inter-domain protection through
    access control and isolation. The L1TF issue was found
    in the way the x86 microprocessor designs have
    implemented speculative execution of instructions (a
    commonly used performance optimization) in combination
    with handling of page-faults caused by terminated
    virtual to physical address resolving process. As a
    result, an unprivileged attacker could use this flaw to
    read privileged memory of the kernel or other processes
    and/or cross guest/host boundaries to read host memory
    by conducting targeted cache side-channel
    attacks.(CVE-2018-3646)

  - An industry-wide issue was found in the way many modern
    microprocessor designs have implemented speculative
    execution of instructions (a commonly used performance
    optimization). There are three primary variants of the
    issue which differ in the way the speculative execution
    can be exploited. Variant CVE-2017-5715 triggers the
    speculative execution by utilizing branch target
    injection. It relies on the presence of a
    precisely-defined instruction sequence in the
    privileged code as well as the fact that memory
    accesses may cause allocation into the microprocessor's
    data cache even for speculatively executed instructions
    that never actually commit (retire). As a result, an
    unprivileged attacker could use this flaw to cross the
    syscall and guest/host boundaries and read privileged
    memory by conducting targeted cache side-channel
    attacks.(CVE-2017-5715)

  - Modern operating systems implement virtualization of
    physical memory to efficiently use available system
    resources and provide inter-domain protection through
    access control and isolation. The L1TF issue was found
    in the way the x86 microprocessor designs have
    implemented speculative execution of instructions (a
    commonly used performance optimization) in combination
    with handling of page-faults caused by terminated
    virtual to physical address resolving process. As a
    result, an unprivileged attacker could use this flaw to
    read privileged memory of the kernel or other processes
    and/or cross guest/host boundaries to read host memory
    by conducting targeted cache side-channel
    attacks.(CVE-2018-3620)

  - In hid_debug_events_read of drivers/hid/hid-debug.c,
    there is a possible out of bounds write due to a
    missing bounds check. This could lead to local
    escalation of privilege with System execution
    privileges needed. User interaction is not needed for
    exploitation. Product: Android Versions: Android kernel
    Android ID: A-71361580.(CVE-2018-9516)

  - Systems with microprocessors utilizing speculative
    execution and speculative execution of memory reads
    before the addresses of all prior memory writes are
    known may allow unauthorized disclosure of information
    to an attacker with local user access via a
    side-channel analysis, aka Speculative Store Bypass
    (SSB), Variant 4.(CVE-2018-3639)

  - It was found that the Linux kernel memory resource
    controller's (memcg) handling of OOM (out of memory)
    conditions could lead to deadlocks. An attacker able to
    continuously spawn new processes within a single
    memory-constrained cgroup during an OOM event could use
    this flaw to lock up the system.(CVE-2014-8171)

  - In sk_clone_lock of sock.c, there is a possible memory
    corruption due to type confusion. This could lead to
    local escalation of privilege with no additional
    execution privileges needed. User interaction is not
    needed for exploitation. Product: Android. Versions:
    Android kernel. Android ID: A-113509306. References:
    Upstream kernel.(CVE-2018-9568)

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-2019-1515
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?789df8aa");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/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:H/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:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:'CANVAS');

  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/13");

  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:"p-cpe:/a:huawei:euleros:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python-perf");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:3.0.1.0");
  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) 2019-2021 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 != "3.0.1.0") audit(AUDIT_OS_NOT, "EulerOS Virtualization 3.0.1.0");
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-3.10.0-862.14.1.6_42",
        "kernel-devel-3.10.0-862.14.1.6_42",
        "kernel-headers-3.10.0-862.14.1.6_42",
        "kernel-tools-3.10.0-862.14.1.6_42",
        "kernel-tools-libs-3.10.0-862.14.1.6_42",
        "kernel-tools-libs-devel-3.10.0-862.14.1.6_42",
        "perf-3.10.0-862.14.1.6_42",
        "python-perf-3.10.0-862.14.1.6_42"];

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

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