CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
86.4%
The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4527-1 advisory.
It was discovered that the Conexant 23885 TV card device driver for the Linux kernel did not properly deallocate memory in some error conditions. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-19054)
It was discovered that the Atheros HTC based wireless driver in the Linux kernel did not properly deallocate in certain error conditions. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-19073, CVE-2019-19074)
Yue Haibing discovered that the Linux kernel did not properly handle reference counting in sysfs for network devices in some situations. A local attacker could possibly use this to cause a denial of service.
(CVE-2019-20811)
It was discovered that the F2FS file system in the Linux kernel did not properly perform bounds checking in some situations, leading to an out-of- bounds read. A local attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2019-9445)
It was discovered that the F2FS file system in the Linux kernel did not properly validate xattr meta data in some situations, leading to an out-of- bounds read. An attacker could use this to construct a malicious F2FS image that, when mounted, could expose sensitive information (kernel memory). (CVE-2019-9453)
It was discovered that the F2FS file system implementation in the Linux kernel did not properly perform bounds checking on xattrs in some situations. A local attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2020-0067)
It was discovered that the NFS client implementation in the Linux kernel did not properly perform bounds checking before copying security labels in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-25212)
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-4527-1. 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(140724);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");
script_cve_id(
"CVE-2019-9445",
"CVE-2019-9453",
"CVE-2019-19054",
"CVE-2019-19073",
"CVE-2019-19074",
"CVE-2019-20811",
"CVE-2020-0067",
"CVE-2020-25212"
);
script_xref(name:"USN", value:"4527-1");
script_name(english:"Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-4527-1)");
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 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in
the USN-4527-1 advisory.
It was discovered that the Conexant 23885 TV card device driver for the Linux kernel did not properly
deallocate memory in some error conditions. A local attacker could use this to cause a denial of service
(memory exhaustion). (CVE-2019-19054)
It was discovered that the Atheros HTC based wireless driver in the Linux kernel did not properly
deallocate in certain error conditions. A local attacker could use this to cause a denial of service
(memory exhaustion). (CVE-2019-19073, CVE-2019-19074)
Yue Haibing discovered that the Linux kernel did not properly handle reference counting in sysfs for
network devices in some situations. A local attacker could possibly use this to cause a denial of service.
(CVE-2019-20811)
It was discovered that the F2FS file system in the Linux kernel did not properly perform bounds checking
in some situations, leading to an out-of- bounds read. A local attacker could possibly use this to expose
sensitive information (kernel memory). (CVE-2019-9445)
It was discovered that the F2FS file system in the Linux kernel did not properly validate xattr meta data
in some situations, leading to an out-of- bounds read. An attacker could use this to construct a malicious
F2FS image that, when mounted, could expose sensitive information (kernel memory). (CVE-2019-9453)
It was discovered that the F2FS file system implementation in the Linux kernel did not properly perform
bounds checking on xattrs in some situations. A local attacker could possibly use this to expose sensitive
information (kernel memory). (CVE-2020-0067)
It was discovered that the NFS client implementation in the Linux kernel did not properly perform bounds
checking before copying security labels in some situations. A local attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-25212)
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-4527-1");
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:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-25212");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/09/06");
script_set_attribute(attribute:"patch_publication_date", value:"2020/09/22");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/09/22");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1080-kvm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1114-aws");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1139-raspi2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1143-snapdragon");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-190-generic");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-190-generic-lpae");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-190-lowlatency");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-190-powerpc-e500mc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-190-powerpc-smp");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-190-powerpc64-emb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-190-powerpc64-smp");
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 (! ('16.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04', '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 = {
'16.04': {
'4.4.0': {
'generic': '4.4.0-190',
'generic-lpae': '4.4.0-190',
'lowlatency': '4.4.0-190',
'powerpc-e500mc': '4.4.0-190',
'powerpc-smp': '4.4.0-190',
'powerpc64-emb': '4.4.0-190',
'powerpc64-smp': '4.4.0-190',
'kvm': '4.4.0-1080',
'aws': '4.4.0-1114',
'raspi2': '4.4.0-1139',
'snapdragon': '4.4.0-1143'
}
}
};
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-4527-1');
}
if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
var cve_list = make_list('CVE-2019-9445', 'CVE-2019-9453', 'CVE-2019-19054', 'CVE-2019-19073', 'CVE-2019-19074', 'CVE-2019-20811', 'CVE-2020-0067', 'CVE-2020-25212');
if (ksplice_cves_check(cve_list))
{
audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-4527-1');
}
else
{
extra = extra + ksplice_reporting_text();
}
}
if (extra) {
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : extra
);
exit(0);
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19054
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19073
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19074
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20811
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9445
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9453
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0067
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25212
ubuntu.com/security/notices/USN-4527-1
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
86.4%