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nessusUbuntu Security Notice (C) 2019-2024 Canonical, Inc. / NASL script (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.UBUNTU_USN-3910-2.NASL
HistoryMar 18, 2019 - 12:00 a.m.

Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3910-2)

2019-03-1800:00:00
Ubuntu Security Notice (C) 2019-2024 Canonical, Inc. / NASL script (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
34

4.9 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

6.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

7.3 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

57.6%

The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3910-2 advisory.

  • fs/f2fs/segment.c in the Linux kernel before 4.13 allows local users to cause a denial of service (NULL pointer dereference and panic) by using a noflush_merge option that triggers a NULL value for a flush_cmd_control data structure. (CVE-2017-18241)

  • 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)

  • The function hso_get_config_data in drivers/net/usb/hso.c in the Linux kernel through 4.19.8 reads if_num from the USB device (as a u8) and uses it to index a small array, resulting in an object out-of-bounds (OOB) read that potentially allows arbitrary read in the kernel address space. (CVE-2018-19985)

  • The resv_map_release function in mm/hugetlb.c in the Linux kernel through 4.15.7 allows local users to cause a denial of service (BUG) via a crafted application that makes mmap system calls and has a large pgoff argument to the remap_file_pages system call. (CVE-2018-7740)

  • In PolicyKit (aka polkit) 0.115, the start time protection mechanism can be bypassed because fork() is not atomic, and therefore authorization decisions are improperly cached. This is related to lack of uid checking in polkitbackend/polkitbackendinteractiveauthority.c. (CVE-2019-6133)

Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3910-2. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('compat.inc');

if (description)
{
  script_id(122893);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");

  script_cve_id(
    "CVE-2017-18241",
    "CVE-2018-1120",
    "CVE-2018-19985",
    "CVE-2018-7740",
    "CVE-2019-6133"
  );
  script_xref(name:"USN", value:"3910-2");

  script_name(english:"Ubuntu 14.04 LTS : Linux kernel (Xenial HWE) vulnerabilities (USN-3910-2)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 14.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in
the USN-3910-2 advisory.

  - fs/f2fs/segment.c in the Linux kernel before 4.13 allows local users to cause a denial of service (NULL
    pointer dereference and panic) by using a noflush_merge option that triggers a NULL value for a
    flush_cmd_control data structure. (CVE-2017-18241)

  - 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)

  - The function hso_get_config_data in drivers/net/usb/hso.c in the Linux kernel through 4.19.8 reads if_num
    from the USB device (as a u8) and uses it to index a small array, resulting in an object out-of-bounds
    (OOB) read that potentially allows arbitrary read in the kernel address space. (CVE-2018-19985)

  - The resv_map_release function in mm/hugetlb.c in the Linux kernel through 4.15.7 allows local users to
    cause a denial of service (BUG) via a crafted application that makes mmap system calls and has a large
    pgoff argument to the remap_file_pages system call. (CVE-2018-7740)

  - In PolicyKit (aka polkit) 0.115, the start time protection mechanism can be bypassed because fork() is
    not atomic, and therefore authorization decisions are improperly cached. This is related to lack of uid
    checking in polkitbackend/polkitbackendinteractiveauthority.c. (CVE-2019-6133)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-3910-2");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/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:H/PR:L/UI:R/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-2019-6133");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/03/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1039-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-lowlatency");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-powerpc-e500mc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-powerpc-smp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-powerpc64-emb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-powerpc64-smp");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2019-2024 Canonical, Inc. / NASL script (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');
include('ksplice.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('14.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var kernel_mappings = {
  '14.04': {
    '4.4.0': {
      'generic': '4.4.0-143',
      'generic-lpae': '4.4.0-143',
      'lowlatency': '4.4.0-143',
      'powerpc-e500mc': '4.4.0-143',
      'powerpc-smp': '4.4.0-143',
      'powerpc64-emb': '4.4.0-143',
      'powerpc64-smp': '4.4.0-143',
      'aws': '4.4.0-1039'
    }
  }
};

var host_kernel_release = get_kb_item('Host/uptrack-uname-r');
if (empty_or_null(host_kernel_release)) host_kernel_release = get_kb_item_or_exit('Host/uname-r');
var host_kernel_base_version = get_kb_item_or_exit('Host/Debian/kernel-base-version');
var host_kernel_type = get_kb_item_or_exit('Host/Debian/kernel-type');
if(empty_or_null(kernel_mappings[os_release][host_kernel_base_version][host_kernel_type])) audit(AUDIT_INST_VER_NOT_VULN, 'kernel ' + host_kernel_release);

var extra = '';
var kernel_fixed_version = kernel_mappings[os_release][host_kernel_base_version][host_kernel_type] + "-" + host_kernel_type;
if (deb_ver_cmp(ver1:host_kernel_release, ver2:kernel_fixed_version) < 0)
{
  extra = extra + 'Running Kernel level of ' + host_kernel_release + ' does not meet the minimum fixed level of ' + kernel_fixed_version + ' for this advisory.\n\n';
}
  else
{
  audit(AUDIT_PATCH_INSTALLED, 'Kernel package for USN-3910-2');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2017-18241', 'CVE-2018-1120', 'CVE-2018-7740', 'CVE-2018-19985', 'CVE-2019-6133');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-3910-2');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}
VendorProductVersionCPE
canonicalubuntu_linuxlinux-image-4.4.0-1039-awsp-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1039-aws
canonicalubuntu_linuxlinux-image-4.4.0-143-genericp-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-generic
canonicalubuntu_linuxlinux-image-4.4.0-143-generic-lpaep-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-generic-lpae
canonicalubuntu_linuxlinux-image-4.4.0-143-lowlatencyp-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-lowlatency
canonicalubuntu_linuxlinux-image-4.4.0-143-powerpc-e500mcp-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-powerpc-e500mc
canonicalubuntu_linuxlinux-image-4.4.0-143-powerpc-smpp-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-powerpc-smp
canonicalubuntu_linuxlinux-image-4.4.0-143-powerpc64-embp-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-powerpc64-emb
canonicalubuntu_linuxlinux-image-4.4.0-143-powerpc64-smpp-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-143-powerpc64-smp
canonicalubuntu_linux14.04cpe:/o:canonical:ubuntu_linux:14.04:-:lts

4.9 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

6.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

7.3 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

57.6%