EulerOS 2.0 SP2 : kernel (EulerOS-SA-2021-1311)

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

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

if (description)
{
  script_id(146701);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/19");

  script_cve_id(
    "CVE-2019-20934",
    "CVE-2019-9456",
    "CVE-2020-0305",
    "CVE-2020-10773",
    "CVE-2020-12114",
    "CVE-2020-12352",
    "CVE-2020-14305",
    "CVE-2020-14351",
    "CVE-2020-15436",
    "CVE-2020-15437",
    "CVE-2020-25656",
    "CVE-2020-27777",
    "CVE-2020-27786",
    "CVE-2020-28915",
    "CVE-2020-28974",
    "CVE-2020-29371",
    "CVE-2020-29660",
    "CVE-2020-29661",
    "CVE-2020-36158"
  );

  script_name(english:"EulerOS 2.0 SP2 : kernel (EulerOS-SA-2021-1311)");

  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 kernel packages installed, the
EulerOS installation on the remote host is affected by the following
vulnerabilities :

  - mwifiex_cmd_802_11_ad_hoc_start in
    drivers/net/wireless/marvell/mwifiex/join.c in the
    Linux kernel through 5.10.4 might allow remote
    attackers to execute arbitrary code via a long SSID
    value, aka CID-5c455c5ab332.(CVE-2020-36158)

  - A flaw was found in the Linux kernel. A use-after-free
    was found in the way the console subsystem was using
    ioctls KDGKBSENT and KDSKBSENT. A local user could use
    this flaw to get read memory access out of bounds. The
    highest threat from this vulnerability is to data
    confidentiality.(CVE-2020-25656)

  - A flaw was found in the Linux kernel. A use-after-free
    memory flaw was found in the perf subsystem allowing a
    local attacker with permission to monitor perf events
    to corrupt memory and possibly escalate privileges. The
    highest threat from this vulnerability is to data
    confidentiality and integrity as well as system
    availability.(CVE-2020-14351)

  - A flaw was found in the way RTAS handled memory
    accesses in userspace to kernel communication. On a
    locked down (usually due to Secure Boot) guest system
    running on top of PowerVM or KVM hypervisors (pseries
    platform) a root like local user could use this flaw to
    further increase their privileges to that of a running
    kernel.(CVE-2020-27777)

  - A locking issue was discovered in the tty subsystem of
    the Linux kernel through 5.9.13.
    drivers/tty/tty_jobctrl.c allows a use-after-free
    attack against TIOCSPGRP, aka
    CID-54ffccbf053b.(CVE-2020-29661)

  - A locking inconsistency issue was discovered in the tty
    subsystem of the Linux kernel through 5.9.13.
    drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c may
    allow a read-after-free attack against TIOCGSID, aka
    CID-c8bcd9c5be24.(CVE-2020-29660)

  - An issue was discovered in the Linux kernel before
    5.2.6. On NUMA systems, the Linux fair scheduler has a
    use-after-free in show_numa_stats() because NUMA fault
    statistics are inappropriately freed, aka
    CID-16d51a590a8c.(CVE-2019-20934)

  - A flaw was found in the Linux kernels implementation of
    MIDI, where an attacker with a local account and the
    permissions to issue an ioctl commands to midi devices,
    could trigger a use-after-free. A write to this
    specific memory while freed and before use could cause
    the flow of execution to change and possibly allow for
    memory corruption or privilege
    escalation.(CVE-2020-27786)

  - An issue was discovered in romfs_dev_read in
    fs/romfs/storage.c in the Linux kernel before 5.8.4.
    Uninitialized memory leaks to userspace, aka
    CID-bcf85fcedfdd.(CVE-2020-29371)

  - In the Android kernel in Pixel C USB monitor driver
    there is a possible OOB 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.(CVE-2019-9456)

  - A stack information leak flaw was found in s390/s390x
    in the Linux kernel's memory manager functionality,
    where it incorrectly writes to the
    /proc/sys/vm/cmm_timeout file. This flaw allows a local
    user to see the kernel data.(CVE-2020-10773)

  - A pivot_root race condition in fs/namespace.c in the
    Linux kernel 4.4.x before 4.4.221, 4.9.x before
    4.9.221, 4.14.x before 4.14.178, 4.19.x before
    4.19.119, and 5.x before 5.3 allows local users to
    cause a denial of service (panic) by corrupting a
    mountpoint reference counter.(CVE-2020-12114)

  - An out-of-bounds memory write flaw was found in how the
    Linux kernel's Voice Over IP H.323 connection tracking
    functionality handled connections on ipv6 port 1720.
    This flaw allows an unauthenticated remote user to
    crash the system, causing a denial of service. The
    highest threat from this vulnerability is to
    confidentiality, integrity, as well as system
    availability.(CVE-2020-14305)

  - Use-after-free vulnerability in fs/block_dev.c in the
    Linux kernel before 5.8 allows local users to gain
    privileges or cause a denial of service by leveraging
    improper access to a certain error
    field.(CVE-2020-15436)

  - The Linux kernel before version 5.8 is vulnerable to a
    NULL pointer dereference in
    drivers/tty/serial/8250/8250_core.c:serial8250_isa_init
    _ports() that allows local users to cause a denial of
    service by using the p->serial_in pointer which
    uninitialized.(CVE-2020-15437)

  - A buffer over-read (at the framebuffer layer) in the
    fbcon code in the Linux kernel before 5.8.15 could be
    used by local attackers to read kernel memory, aka
    CID-6735b4632def.(CVE-2020-28915)

  - A slab-out-of-bounds read in fbcon in the Linux kernel
    before 5.9.7 could be used by local attackers to read
    privileged information or potentially crash the kernel,
    aka CID-3c4e0dff2095. This occurs because
    KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for
    manipulations such as font height.(CVE-2020-28974)

  - In cdev_get of char_dev.c, there is a possible
    use-after-free due to a race condition. This could lead
    to local escalation of privilege with System execution
    privileges needed. User interaction is not needed for
    exploitation.Product: AndroidVersions:
    Android-10Android ID: A-153467744(CVE-2020-0305)

  - Improper access control in BlueZ may allow an
    unauthenticated user to potentially enable information
    disclosure via adjacent access.(CVE-2020-12352)

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-2021-1311
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a5285fd5");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:C");
  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:N/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-2020-14305");

  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:"2021/02/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/02/22");

  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-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-debuginfo-common-x86_64");
  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:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python-perf");
  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) 2021-2024 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 !~ "^(2)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2", "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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["kernel-3.10.0-327.62.59.83.h255",
        "kernel-debug-3.10.0-327.62.59.83.h255",
        "kernel-debug-devel-3.10.0-327.62.59.83.h255",
        "kernel-debuginfo-3.10.0-327.62.59.83.h255",
        "kernel-debuginfo-common-x86_64-3.10.0-327.62.59.83.h255",
        "kernel-devel-3.10.0-327.62.59.83.h255",
        "kernel-headers-3.10.0-327.62.59.83.h255",
        "kernel-tools-3.10.0-327.62.59.83.h255",
        "kernel-tools-libs-3.10.0-327.62.59.83.h255",
        "perf-3.10.0-327.62.59.83.h255",
        "python-perf-3.10.0-327.62.59.83.h255"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"2", 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");
}