7.2 High
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
7.8 High
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
7.7 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
54.3%
The remote Ubuntu 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4439-1 advisory.
DISPUTED An issue was discovered in the efi subsystem in the Linux kernel through 5.1.5.
phys_efi_set_virtual_address_map in arch/x86/platform/efi/efi.c and efi_call_phys_prolog in arch/x86/platform/efi/efi_64.c mishandle memory allocation failures. NOTE: This id is disputed as not being an issue because All the code touched by the referenced commit runs only at boot, before any user processes are started. Therefore, there is no possibility for an unprivileged user to control it…
(CVE-2019-12380)
An issue was discovered in the Linux kernel through 5.2.13. nbd_genl_status in drivers/block/nbd.c does not check the nla_nest_start_noflag return value. (CVE-2019-16089)
btrfs_root_node in fs/btrfs/ctree.c in the Linux kernel through 5.3.12 allows a NULL pointer dereference because rcu_dereference(root->node) can be zero. (CVE-2019-19036)
relay_open in kernel/relay.c in the Linux kernel through 5.4.1 allows local users to cause a denial of service (such as relay blockage) by triggering a NULL alloc_percpu result. (CVE-2019-19462)
go7007_snd_init in drivers/media/usb/go7007/snd-go7007.c in the Linux kernel before 5.6 does not call snd_card_free for a failure path, which causes a memory leak, aka CID-9453264ef586. (CVE-2019-20810)
A flaw was found in the Linux kernel’s implementation of Userspace core dumps. This flaw allows an attacker with a local account to crash a trivial program and exfiltrate private kernel data.
(CVE-2020-10732)
A flaw was found in the Linux Kernel in versions after 4.5-rc1 in the way mremap handled DAX Huge Pages.
This flaw allows a local attacker with access to a DAX enabled storage to escalate their privileges on the system. (CVE-2020-10757)
A logic bug flaw was found in Linux kernel before 5.8-rc1 in the implementation of SSBD. A bug in the logic handling allows an attacker with a local account to disable SSBD protection during a context switch when additional speculative execution mitigations are in place. This issue was introduced when the per task/process conditional STIPB switching was added on top of the existing SSBD switching. The highest threat from this vulnerability is to confidentiality. (CVE-2020-10766)
A flaw was found in the Linux kernel before 5.8-rc1 in the implementation of the Enhanced IBPB (Indirect Branch Prediction Barrier). The IBPB mitigation will be disabled when STIBP is not available or when the Enhanced Indirect Branch Restricted Speculation (IBRS) is available. This flaw allows a local attacker to perform a Spectre V2 style attack when this configuration is active. The highest threat from this vulnerability is to confidentiality. (CVE-2020-10767)
A flaw was found in the Linux Kernel before 5.8-rc1 in the prctl() function, where it can be used to enable indirect branch speculation after it has been disabled. This call incorrectly reports it as being ‘force disabled’ when it is not and opens the system to Spectre v2 attacks. The highest threat from this vulnerability is to confidentiality. (CVE-2020-10768)
It was discovered that aufs improperly managed inode reference counts in the vfsub_dentry_open() method. A local attacker could use this vulnerability to cause a denial of service attack. (CVE-2020-11935)
An issue was discovered in the Linux kernel 4.4 through 5.7.1. drivers/tty/vt/keyboard.c has an integer overflow if k_ascii is called several times in a row, aka CID-b86dab054059. NOTE: Members in the community argue that the integer overflow does not lead to a security issue in this case. (CVE-2020-13974)
An issue was discovered in drivers/acpi/acpi_configfs.c in the Linux kernel before 5.7.7. Injection of malicious ACPI tables via configfs could be used by attackers to bypass lockdown and secure boot restrictions, aka CID-75b0cea7bf30. (CVE-2020-15780)
An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032. (CVE-2019-20908)
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-4439-1. 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(139027);
script_version("1.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");
script_cve_id(
"CVE-2019-12380",
"CVE-2019-16089",
"CVE-2019-19036",
"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:"4439-1");
script_name(english:"Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-4439-1)");
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-4439-1 advisory.
- **DISPUTED** An issue was discovered in the efi subsystem in the Linux kernel through 5.1.5.
phys_efi_set_virtual_address_map in arch/x86/platform/efi/efi.c and efi_call_phys_prolog in
arch/x86/platform/efi/efi_64.c mishandle memory allocation failures. NOTE: This id is disputed as not
being an issue because All the code touched by the referenced commit runs only at boot, before any user
processes are started. Therefore, there is no possibility for an unprivileged user to control it..
(CVE-2019-12380)
- An issue was discovered in the Linux kernel through 5.2.13. nbd_genl_status in drivers/block/nbd.c does
not check the nla_nest_start_noflag return value. (CVE-2019-16089)
- btrfs_root_node in fs/btrfs/ctree.c in the Linux kernel through 5.3.12 allows a NULL pointer dereference
because rcu_dereference(root->node) can be zero. (CVE-2019-19036)
- relay_open in kernel/relay.c in the Linux kernel through 5.4.1 allows local users to cause a denial of
service (such as relay blockage) by triggering a NULL alloc_percpu result. (CVE-2019-19462)
- go7007_snd_init in drivers/media/usb/go7007/snd-go7007.c in the Linux kernel before 5.6 does not call
snd_card_free for a failure path, which causes a memory leak, aka CID-9453264ef586. (CVE-2019-20810)
- A flaw was found in the Linux kernel's implementation of Userspace core dumps. This flaw allows an
attacker with a local account to crash a trivial program and exfiltrate private kernel data.
(CVE-2020-10732)
- A flaw was found in the Linux Kernel in versions after 4.5-rc1 in the way mremap handled DAX Huge Pages.
This flaw allows a local attacker with access to a DAX enabled storage to escalate their privileges on the
system. (CVE-2020-10757)
- A logic bug flaw was found in Linux kernel before 5.8-rc1 in the implementation of SSBD. A bug in the
logic handling allows an attacker with a local account to disable SSBD protection during a context switch
when additional speculative execution mitigations are in place. This issue was introduced when the per
task/process conditional STIPB switching was added on top of the existing SSBD switching. The highest
threat from this vulnerability is to confidentiality. (CVE-2020-10766)
- A flaw was found in the Linux kernel before 5.8-rc1 in the implementation of the Enhanced IBPB (Indirect
Branch Prediction Barrier). The IBPB mitigation will be disabled when STIBP is not available or when the
Enhanced Indirect Branch Restricted Speculation (IBRS) is available. This flaw allows a local attacker to
perform a Spectre V2 style attack when this configuration is active. The highest threat from this
vulnerability is to confidentiality. (CVE-2020-10767)
- A flaw was found in the Linux Kernel before 5.8-rc1 in the prctl() function, where it can be used to
enable indirect branch speculation after it has been disabled. This call incorrectly reports it as being
'force disabled' when it is not and opens the system to Spectre v2 attacks. The highest threat from this
vulnerability is to confidentiality. (CVE-2020-10768)
- It was discovered that aufs improperly managed inode reference counts in the vfsub_dentry_open() method. A
local attacker could use this vulnerability to cause a denial of service attack. (CVE-2020-11935)
- An issue was discovered in the Linux kernel 4.4 through 5.7.1. drivers/tty/vt/keyboard.c has an integer
overflow if k_ascii is called several times in a row, aka CID-b86dab054059. NOTE: Members in the community
argue that the integer overflow does not lead to a security issue in this case. (CVE-2020-13974)
- An issue was discovered in drivers/acpi/acpi_configfs.c in the Linux kernel before 5.7.7. Injection of
malicious ACPI tables via configfs could be used by attackers to bypass lockdown and secure boot
restrictions, aka CID-75b0cea7bf30. (CVE-2020-15780)
- An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access
permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot
restrictions, aka CID-1957a85b0032. (CVE-2019-20908)
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-4439-1");
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:"2019/05/28");
script_set_attribute(attribute:"patch_publication_date", value:"2020/07/27");
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-5.0.0-1045-gke");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0.0-1065-oem-osp1");
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': {
'5.0.0': {
'gke': '5.0.0-1045',
'oem-osp1': '5.0.0-1065'
}
}
};
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-4439-1');
}
if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
var cve_list = make_list('CVE-2019-12380', 'CVE-2019-16089', 'CVE-2019-19036', '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-4439-1');
}
else
{
extra = extra + ksplice_reporting_text();
}
}
if (extra) {
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : extra
);
exit(0);
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | linux-image-5.0.0-1045-gke | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0.0-1045-gke |
canonical | ubuntu_linux | linux-image-5.0.0-1065-oem-osp1 | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.0.0-1065-oem-osp1 |
canonical | ubuntu_linux | 18.04 | cpe:/o:canonical:ubuntu_linux:18.04:-:lts |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12380
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16089
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19036
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-4439-1
7.2 High
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
7.8 High
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
7.7 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
54.3%