CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
33.9%
The remote Ubuntu 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4440-1 advisory.
It was discovered that the network block device (nbd) implementation in the Linux kernel did not properly check for error conditions in some situations. An attacker could possibly use this to cause a denial of service (system crash). (CVE-2019-16089)
It was discovered that the kernel->user space relay implementation in the Linux kernel did not properly check return values in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2019-19462)
Chuhong Yuan discovered that go7007 USB audio device driver in the Linux kernel did not properly deallocate memory in some failure conditions. A physically proximate attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-20810)
Jason A. Donenfeld discovered that the ACPI implementation in the Linux kernel did not properly restrict loading SSDT code from an EFI variable. A privileged attacker could use this to bypass Secure Boot lockdown restrictions and execute arbitrary code in the kernel. (CVE-2019-20908)
It was discovered that the elf handling code in the Linux kernel did not initialize memory before using it in certain situations. A local attacker could use this to possibly expose sensitive information (kernel memory). (CVE-2020-10732)
Fan Yang discovered that the mremap implementation in the Linux kernel did not properly handle DAX Huge Pages. A local attacker with access to DAX storage could use this to gain administrative privileges.
(CVE-2020-10757)
It was discovered that the Linux kernel did not correctly apply Speculative Store Bypass Disable (SSBD) mitigations in certain situations. A local attacker could possibly use this to expose sensitive information. (CVE-2020-10766)
It was discovered that the Linux kernel did not correctly apply Indirect Branch Predictor Barrier (IBPB) mitigations in certain situations. A local attacker could possibly use this to expose sensitive information. (CVE-2020-10767)
It was discovered that the Linux kernel could incorrectly enable Indirect Branch Speculation after it has been disabled for a process via a prctl() call. A local attacker could possibly use this to expose sensitive information. (CVE-2020-10768)
Mauricio Faria de Oliveira discovered that the aufs implementation in the Linux kernel improperly managed inode reference counts in the vfsub_dentry_open() method. A local attacker could use this vulnerability to cause a denial of service. (CVE-2020-11935)
It was discovered that the Virtual Terminal keyboard driver in the Linux kernel contained an integer overflow. A local attacker could possibly use this to have an unspecified impact. (CVE-2020-13974)
Jason A. Donenfeld discovered that the ACPI implementation in the Linux kernel did not properly restrict loading ACPI tables via configfs. A privileged attacker could use this to bypass Secure Boot lockdown restrictions and execute arbitrary code in the kernel. (CVE-2020-15780)
Tenable has extracted the preceding description block directly from the Ubuntu security advisory.
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-4440-1. 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(139028);
script_version("1.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");
script_cve_id(
"CVE-2019-16089",
"CVE-2019-19462",
"CVE-2019-20810",
"CVE-2019-20908",
"CVE-2020-10732",
"CVE-2020-10757",
"CVE-2020-10766",
"CVE-2020-10767",
"CVE-2020-10768",
"CVE-2020-11935",
"CVE-2020-13974",
"CVE-2020-15780"
);
script_xref(name:"USN", value:"4440-1");
script_name(english:"Ubuntu 18.04 LTS : linux kernel vulnerabilities (USN-4440-1)");
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 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in
the USN-4440-1 advisory.
It was discovered that the network block device (nbd) implementation in the Linux kernel did not properly
check for error conditions in some situations. An attacker could possibly use this to cause a denial of
service (system crash). (CVE-2019-16089)
It was discovered that the kernel->user space relay implementation in the Linux kernel did not properly
check return values in some situations. A local attacker could possibly use this to cause a denial of
service (system crash). (CVE-2019-19462)
Chuhong Yuan discovered that go7007 USB audio device driver in the Linux kernel did not properly
deallocate memory in some failure conditions. A physically proximate attacker could use this to cause a
denial of service (memory exhaustion). (CVE-2019-20810)
Jason A. Donenfeld discovered that the ACPI implementation in the Linux kernel did not properly restrict
loading SSDT code from an EFI variable. A privileged attacker could use this to bypass Secure Boot
lockdown restrictions and execute arbitrary code in the kernel. (CVE-2019-20908)
It was discovered that the elf handling code in the Linux kernel did not initialize memory before using it
in certain situations. A local attacker could use this to possibly expose sensitive information (kernel
memory). (CVE-2020-10732)
Fan Yang discovered that the mremap implementation in the Linux kernel did not properly handle DAX Huge
Pages. A local attacker with access to DAX storage could use this to gain administrative privileges.
(CVE-2020-10757)
It was discovered that the Linux kernel did not correctly apply Speculative Store Bypass Disable (SSBD)
mitigations in certain situations. A local attacker could possibly use this to expose sensitive
information. (CVE-2020-10766)
It was discovered that the Linux kernel did not correctly apply Indirect Branch Predictor Barrier (IBPB)
mitigations in certain situations. A local attacker could possibly use this to expose sensitive
information. (CVE-2020-10767)
It was discovered that the Linux kernel could incorrectly enable Indirect Branch Speculation after it has
been disabled for a process via a prctl() call. A local attacker could possibly use this to expose
sensitive information. (CVE-2020-10768)
Mauricio Faria de Oliveira discovered that the aufs implementation in the Linux kernel improperly managed
inode reference counts in the vfsub_dentry_open() method. A local attacker could use this vulnerability to
cause a denial of service. (CVE-2020-11935)
It was discovered that the Virtual Terminal keyboard driver in the Linux kernel contained an integer
overflow. A local attacker could possibly use this to have an unspecified impact. (CVE-2020-13974)
Jason A. Donenfeld discovered that the ACPI implementation in the Linux kernel did not properly restrict
loading ACPI tables via configfs. A privileged attacker could use this to bypass Secure Boot lockdown
restrictions and execute arbitrary code in the kernel. (CVE-2020-15780)
Tenable has extracted the preceding description block directly from the Ubuntu security advisory.
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-4440-1");
script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/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-2020-15780");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-13974");
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:"2019/09/06");
script_set_attribute(attribute:"patch_publication_date", value:"2020/07/31");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/07/28");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1030-raspi2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1032-aws");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1034-azure");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-64-generic");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-64-generic-lpae");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-64-lowlatency");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-: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) 2020-2024 Canonical, Inc. / NASL script (C) 2020-2024 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 (! ('18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04', '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 = {
'18.04': {
'5.3.0': {
'generic': '5.3.0-64',
'generic-lpae': '5.3.0-64',
'lowlatency': '5.3.0-64',
'raspi2': '5.3.0-1030',
'aws': '5.3.0-1032',
'azure': '5.3.0-1034'
}
}
};
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 += '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-4440-1');
}
if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
var cve_list = make_list('CVE-2019-16089', 'CVE-2019-19462', 'CVE-2019-20810', 'CVE-2019-20908', 'CVE-2020-10732', 'CVE-2020-10757', 'CVE-2020-10766', 'CVE-2020-10767', 'CVE-2020-10768', 'CVE-2020-11935', 'CVE-2020-13974', 'CVE-2020-15780');
if (ksplice_cves_check(cve_list))
{
audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-4440-1');
}
else
{
extra = extra + ksplice_reporting_text();
}
}
if (extra) {
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : extra
);
exit(0);
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16089
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19462
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20810
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20908
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10732
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10757
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10766
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10767
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10768
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11935
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13974
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15780
ubuntu.com/security/notices/USN-4440-1
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
33.9%